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Neo_AM809 Smart Module Hardware User Guide

Copyright © Neoway Technology Co., Ltd i

Neo_AM809 Smart Module

Hardware User Guide

Version 1.1


Copyright © Neoway Technology Co., Ltd i

Copyright © 2015 Neoway Technology Co., Ltd All right is reserved

is the trademark of Neoway Technology Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective

holders.

Remarks

This document is intended for system engineers (SEs), development engineers, and test engineers.

The information in this document is subject to change without notice due to product version update

or other reasons.

Every effort has been made in preparation of this document to ensure accuracy of the contents, but all

statements, information, and recommendations in this document do not constitute a warranty of any

kind, express or implied.

Neoway provides customers complete technical support. If you have any question, please contact

your account manager or email to

[email protected]

[email protected]

Website: http://www.neoway.com


Copyright © Neoway Technology Co., Ltd ii

Contents

About This Document ......................................................................................................... 1

1 Introduction to AM809 ..................................................................................................... 1

1.1 Overview ............................................................................................................................................ 1

1.2 Block Diagram ................................................................................................................................... 1

1.3 Features .............................................................................................................................................. 2

2 Pin Description and PCB Foot Print .............................................................................. 6

2.1 Specifications and Pin Definition ....................................................................................................... 6

2.2 Pin Description ................................................................................................................................... 7

2.3 PCB Foot Print ................................................................................................................................. 18

3 Power Supply Interfaces ................................................................................................ 19

3.1 Power Supply Pins ............................................................................................................................ 19

3.2 Power-On .......................................................................................................................................... 23

3.3 Hard Reset ........................................................................................................................................ 24

3.4 Hard Power-off ................................................................................................................................. 25

3.5 VRTC Power Supply ........................................................................................................................ 26

3.6 Battery Management ........................................................................................................................ 26

4 Video I/O Interfaces ........................................................................................................ 28

4.1 LCD Interfaces ................................................................................................................................. 28

4.1.1 WVGA .................................................................................................................................... 28

4.1.2 720P ........................................................................................................................................ 31

4.2 TP Interfaces ..................................................................................................................................... 32

4.3 Camera Interfaces ............................................................................................................................. 33

4.3.1 Main Camera ........................................................................................................................... 34

4.3.2 Sub-Camera ............................................................................................................................. 35

4.3.3 Design Cautions ...................................................................................................................... 36

4.3.4 Camera Power Supply ............................................................................................................. 38

4.4 Design Cautions ............................................................................................................................... 39

5 Audio Interface ................................................................................................................ 40

5.1 Audio Input ....................................................................................................................................... 40

5.2 Audio Output .................................................................................................................................... 40

5.3 Headphone Interfaces ....................................................................................................................... 41

5.4 Audio Design Cautions ..................................................................................................................... 43

6 Peripheral Interfaces ....................................................................................................... 44


Copyright © Neoway Technology Co., Ltd iii

6.1 USB Interface ................................................................................................................................... 44

6.2 UIM Card Interface .......................................................................................................................... 45

6.3 SDIO ................................................................................................................................................. 46

6.3.1 SD Card ................................................................................................................................... 46

6.3.2 SD Peripheral Interface ........................................................................................................... 47

6.4 GPIO ................................................................................................................................................. 47

6.4.1 UART ...................................................................................................................................... 48

6.4.2 I2C ........................................................................................................................................... 49

6.4.3 SPI ........................................................................................................................................... 50

6.5 ADC .................................................................................................................................................. 50

6.6 Other Interfaces ................................................................................................................................ 50

7 RF Interface ....................................................................................................................... 52

7.1 2G/3G RF Design and PCB Layout ................................................................................................. 52

7.2 WIFI/BT RF Design and PCB Layout .............................................................................................. 53

7.3 GPS RF Design and PCB Layout ..................................................................................................... 55

7.3.1 GPS Impedance ....................................................................................................................... 55

7.3.2 Active GPS Antenna Design.................................................................................................... 56

7.3.3 Passive GPS antenna design reference .................................................................................... 56

7.4 FM RF Design and PCB Layout ....................................................................................................... 57

8 Commissioning Interface ............................................................................................... 59

9 Electric Feature and Reliability .................................................................................... 60

9.1 Electric Feature ................................................................................................................................. 60

9.2 Temperature ...................................................................................................................................... 60

9.3 ESD Protection ................................................................................................................................. 60

10 RF feature ........................................................................................................................ 62

10.1 Work band ...................................................................................................................................... 62

10.2 TX Power and RX Sensitivity ........................................................................................................ 62

11 Mounting and Packaging ............................................................................................. 64

11.1 Mounting the Module onto the Application Board ......................................................................... 64

11.2 Package ........................................................................................................................................... 64

12 Abbreviations ................................................................................................................. 65


Copyright © Neoway Technology Co., Ltd iv

Table of Figures Figure 1-1 AM809 block diagram ........................................................................................................... 2

Figure 2-1 Top view of AM809 ............................................................................................................... 6

Figure 2-2 PCC foot print recommended for AM809 ............................................................................ 18

Figure 3-1 Current peaks and voltage drops .......................................................................................... 19

Figure 3-2 Capacitors used for the power supply .................................................................................. 20

Figure 3-3 Reference design of power supply control ........................................................................... 20

Figure 3-4 Reference design of power supply controlled by p-MOSFET ............................................. 21

Figure 3-5 Reference designs of separated power supply ...................................................................... 22

Figure 3-6 Push switch controlling ........................................................................................................ 23

Figure 3-7 MCU controlling .................................................................................................................. 23

Figure 3-8 AM809 power-on sequence .................................................................................................. 23

Figure 3-9 Reset controlled by button ................................................................................................... 24

Figure 3-10 Reset circuit with triode separating .................................................................................... 24

Figure 3-11 AM809 reset sequence ....................................................................................................... 25

Figure 3-12 AM809 power-off sequence ............................................................................................... 25

Figure 3-13 VRTC design in the module ............................................................................................... 26

Figure 3-14 Battery connections ............................................................................................................ 27

Figure 4-1 Reference MIPI circuits with common mode chokes .......................................................... 29

Figure 4-2 AM809 LCD backlight chipset ............................................................................................ 30

Figure 4-3 Power supply of AM809 LCD driver ................................................................................... 30

Figure 4-4 Reference design of LCD interface ...................................................................................... 31

Figure 4-5 Reference design of TP interface ......................................................................................... 33

Figure 4-6 Reference design of the main camera interface.................................................................... 35

Figure 4-7 Reference design of sub-camera interface ........................................................................... 36

Figure 4-8 Scan direction of 3264*2448 LCD ...................................................................................... 36

Figure 4-9 Reference design of customized camera .............................................................................. 37

Figure 4-10 Adjustment of camera sensor ............................................................................................. 37

Figure 4-11 Reference design of the main camera power supply .......................................................... 38

Figure 4-12 Reference design of the main camera power supply .......................................................... 38

Figure 5-1 Reference design of MIC connection ................................................................................... 40

Figure 5-2 Reference design of EAR/SPK connections ........................................................................ 41

Figure 5-3 Reference design of headphone without FM ........................................................................ 42


Copyright © Neoway Technology Co., Ltd v

Figure 5-4 Headphone interface ............................................................................................................ 43

Figure 6-1 USB circuit(without OTG)................................................................................................... 44

Figure 6-2 USB circuit (with OTG) ....................................................................................................... 44

Figure 6-3 Reference design of SIM card interface ............................................................................... 45

Figure 6-4 Reference design of TF card interface ................................................................................. 46

Figure 6-5 Reference design of the UART interface ............................................................................. 48

Figure 6-6 Recommended circuit for the communication between 5V MCU and UART ..................... 49

Figure 6-7 Reference design of I2C ....................................................................................................... 49

Figure 6-8 Reference design of the SPI ................................................................................................. 50

Figure 6-9 Reference design of motor circuit ........................................................................................ 51

Figure 7-1 Reference of antenna matching design ................................................................................ 52

Figure 7-2 Recommended RF PCB design ............................................................................................ 52

Figure 7-3 Encapsulation specifications of Murata RF connector ......................................................... 53

Figure 7-4 RF connections..................................................................................................................... 53

Figure 7-5 Antenna layout ..................................................................................................................... 54

Figure 7-6 Clearance around the antenna .............................................................................................. 54

Figure 7-7 GPS RF structure ................................................................................................................. 55

Figure 7-8 Power supply reference for active antenna .......................................................................... 56

Figure 7-9 Passive GPS antenna design reference ................................................................................. 57

Figure 7-10 Reference design of the headphone circuit with FM function ........................................... 58

Figure 8-1 Reference design of the fastboot interface ........................................................................... 59


Copyright © Neoway Technology Co., Ltd vi

Table of Tables AM809 baseband and wireless features ................................................................................... 2

AM809 dimensions .................................................................................................................. 6

AM809 pin description ............................................................................................................ 7

WVGA LCD description ........................................................................................................ 28

720P LCD pins ....................................................................................................................... 31

TP pins ................................................................................................................................... 32

Main camera pins ................................................................................................................... 34

Sub-camera pins ..................................................................................................................... 35

Audio input pins ..................................................................................................................... 40

Audio output pins ................................................................................................................... 41

Headphone pins ..................................................................................................................... 41

TF card pins ........................................................................................................................... 46

Pin Description ...................................................................................................................... 47

ADC pin ................................................................................................................................. 50

AM809 Electric Feature ......................................................................................................... 60

Temperature Feature .............................................................................................................. 60

AM809 ESD feature............................................................................................................... 61

AM809 work band ............................................................................................................... 62

AM809 RF power and RX sensitivity .................................................................................. 62


Copyright © Neoway Technology Co., Ltd vii

Revision Record

Version Changes Revised By Date

V1.0 Initial draft Li,Tian 2015-05

V1.1 Modified the initial functions of the 90, 91, 92,

93, 110, 111, 112, and 113 pins

Added VRTC performance parameters

Added audio parameters

Added the USB OTG function

Modified the ADC collecting precision

Li 2015-06


Copyright © Neoway Technology Co., Ltd 1

About This Document

This document details the features, indicators, and reference standards of the AM809 module and provides

reference for the hardware design of each interface. This user guide can help you complete wireless

communication application easily.

1 Introduction to AM809

1.1 Overview

AM809 is an industrial smart module that is developed on Qualcomm platform and supports Windows 10

and Android OS. Its dimensions are 40mm x 40 mm x 2.8mm. It is well applicable to in-vehicle

computers, multimedia terminals, smart homes, IoT terminals, etc, with the following features:

Quad-core ARM Cortex-A7 processors, 1.1 GHz main frequency, 512kB L2 cache, 28 nm

8Gb LPDDR3 RAM; 8GB Nand Flash, eMMC interface, supporting at most 32GB

GSM/WCDMA/HSPA+, CDMA2000/EV-DOrA, WiFi 802.11b/g/n, BT4.0,

GPS/GLONASS/BEIDOU communications modes; FM radio

Windows 10, Android 5.1 OS

MIPI interface LCD, supporting at most 720P

MIPI interface dual-camera, among which the main camera supports at most 8MP and the sub

camera supports 3MP

Multiple-channel audio I/O, supporting stereo headphone

USB2.0 high-speed serial port, SDIO3.0, 10-bit ADC, UART, SPI, I2C, PWM, GPIO, charging

management, etc.

1.2 Block Diagram

Figure 1-1 shows the block diagram of AM809.



Figure 1-1 AM809 block diagram

Power Management

RF

Sectio

n

LCD

(MIPI)

TP

(MIPI)

Main/Sub

Cam

(MIPI)

USB/UART/SPI/I2C/GPIO/

PWM

Power

supply

input

Memory Baseband

4G

DRX

GPSAudio

2G/3G

/4G

BT /

Wi-Fi

ADC

Charge

Analog

interface

Digital interface

1.3 Features

AM809 baseband and wireless features

Specifications Description

Power supply VBAT: 3.5V to 4.2V, typical value 3.9V

Current

Flight mode: 2 mA

Sleeping mode: 4mA

Operating

temperature -25℃ to +75℃

Baseband temperature

Processor Quad-core ARM Cortex-A7 processor

Main frequency: 1.1 GHz



512 KB L2 cache

Multimedia

processor

QDSP6 v5 core

Operation frequency 691 MHz

768KB L2

Memory

8Gb LPDDR3 SDRAM

32-bit bus

Maximum operation frequency 533MHz

Storage

8GB NAND Flash

Embedded EMMC

At most 32GB

RF feature

Band

GSM850/EGSM900/DCS1800/PCS1900

WCDMA 2100

CDMA2000 1x/EVDO

LTE-FDD B1, B3; LTE-TDD B39, B40, B41

Sensitivity

2G/3G< -107dBm;

LTE: B1<-98; B3<-95; B39<-98; 40<-98; 41<-96

LTE Test Bandwidth: 10MHz

Transmit power

GSM850/EGSM900: +33dBm (Power Class 4)

DCS1800/PCS1900: +30dBm (Power Class 1)

EDGE 850M/900MHz: +27dBm (Power Class E2)

EDGE1800MHz/1900MHz: +26dBm (Power Class E2)

WCDMA/HSDPA: +23dBm (Power Class 3)

CDMA/EVDO: +23dBm (Power Class 3)

LTE: +23dBm (Power Class 3)

Protocol

GSM/GPRS/EDGE,

WCDMA R99, Rel9DC- HSDPA+(42Mbps)

CDMA2000@1x, 1xAdvanced, 1xEV-DOrA

LTE Cat4

Satellite

positioning GPS / BEIDOU/ GLONASS

Antenna feature 50Ω impedance

Multimedia

Display interface 4 groups of MIPI_DSI, each of which supports 1.5 Gbps



Support WVGA (two groups of MIPI_DSI), at most 720p (4 groups of

MIPI_DSI)

24-bit color depth

Camera Interfaces

MIPI_CSI, each group of which support at most 1.5 Gbps rate, supporting 2

cameras

Rear camera uses two groups of MIPI_CSI, supporting at most 8MP

Front camera uses one group of MIPI_CSI, supporting at most 3MP

Video processing

Coding

H.264 BP/MP – 720p, 30 fps

MPEG-4 SP / H.263 P0 – WVGA, 30 fps

VP8 – WVGA, 30 fps

Decoding

H.264 BP/MP/HP – RES, 30 fps

MPEG-4 SP/ASP – RES, 30 fps

DivX 4x/5x/6x – RES, 30 fps

H.263 P0 – WVGA, 30 fps

VP8 – RES, 30 fps

(HEVC) H.265 MP 8 bit – RES, 30 fps

Graphics

processing unit

Adreno 304, at most 400MHz 3D graphics processing, GMEM 96kB 96 kB

API supports OpenGL ES 1.1, 2.0, 3.0/DirectX 9.3

Audio

Encoder/decoder

Voice encoding/decoding supports G711, Raw PCM, QCELP; EVRC, -B,

-WB; AMR-NB, -WB; GSM-EFR, -FR, -HR

Audio encoding/decoding supports MP3; AAC, AAC+, eAAC; AMR-NB,

-WB, G.711, WMA 9/10 Pro

Noise rejection

Audio Input 3 groups of analog MIC input, embedding internal bias

Audio Output

Class-AB headphone amplifier

Class-AB differential receiver amplifier

Class-D speaker amplifier

Connection feature

UART At most 4 Mbps, 2 groups

I2C 2 groups of I2C

SPI One group, supporting only host mode

At most 52Mbps

UIM 2 groups, 1.8V/2.85V dual-voltage adaptive



USB 1 group of USB2.0 high-speed interface

Only DEVIECE mode

SDIO Supporting SD3.0 and SD/MMC cards

Wireless connection

WLAN

2.4G single band, supporting 802.11b/g/n, at most 72Mbps

Wake-on-WLAN (WoWLAN)

Ad-Hoc mode

WAPI supports SMS4 hardware encryption

AP mode

Wi-Fi Direct

Bluetooth BT4.1LE

FM Supporting Rx, 76 to 108MHz, channel spacing of 50 kHz

RDS (Europe) RBDS (USA)

Commissioning Interface

Fastboot mode Forcibly enable USB control



2 Pin Description and PCB Foot Print

2.1 Specifications and Pin Definition

AM809 dimensions

Specifications AM809

Dimensions 40mm*40mm*2.8mm(H*W*D)

Weight 9.0g

Package 152-Pin LCC

Figure 2-1 Top view of AM809



2.2 Pin Description

AM809 pin description

Pin Signal General

Function

Level

Feature (V) Interrupt GPIO

Alternate

Function 1

Alternate

Function 2

Alternate

Function 3

1 VIB_DRV_N Motor

2, 3 VBAT VBAT 3.5~4.2V

4, 5 VBUS_USB_IN USB Power 5V

6 GND GND

7 USB_DM USB-

8 USB_DP USB+

9 GND GND

10 USB_HS_ID USB

11 GPIO_52 UIM2 1.8V 52 UIM2_PRESENT

12 UIM2_RESET UIM2

13 UIM2_CLK UIM2

14 UIM2_DATA UIM2

15 VREG_UIM2 UIM Power 1.8V/2.85V



16 GND GND

17 GPIO_52 UIM1 1.8V 56 UIM1_PRESENT

18 UIM1_RESET UIM1

19 UIM1_CLK UIM1

20 UIM1_DATA UIM1

21 VREG_UIM1 UIM Power 1.8V/2.85V

22 GND GND

23 SDC2_DATA2 TF

24 SDC2_DATA3 TF

25 SDC2_CMD TF

26 VREG_SDC_PWR TF 2.95V

27 SDC2_CLK TF

28 SDC2_DATA0 TF

29 SDC2_DATA1 TF

30 SD_CARD_DET_N TF 1.8V ► 38 SD_CARD_DET_

N CCI_TIMER2

31 GND GND

32 GPIO_15 1.8V 15 BLSP4_SPI_CLK BLSP4_I2C_SCL



33 GPIO_14 1.8V 14 BLSP4_SPI_CS_

N BLSP4_I2C_SDA

34 TS_INT_N TP 1.8V ► 13 BLSP4_SPI_MIS

O

35 TS_RST_N TP 1.8V ► 12 BLSP4_SPI_MOS

I

36 WLED_PWM LCD 1.8V PM-MPP_

2

37 LCD_DIF LCD 1.8V 23 UIM3_CLK

38 LCD_RST_N LCD 1.8V ► 25 DSI_RST MDP_VSYNC_S

39 LCD_TE LCD 1.8V 24 MDP_VSYNC_P

40 GND GND

41 MIPI_DSI0_LANE1_P LCD

42 MIPI_DSI0_LANE1_M LCD

43 MIPI_DSI0_CLK_M LCD

44 MIPI_DSI0_CLK_P LCD









51 GND

52 MIPI_CSI0_LANE0_P REAR

CAMEAR

53 MIPI_CSI0_LANE0_M REAR

CAMEAR

54 MIPI_CSI0_CLK_P REAR

CAMEAR

55 MIPI_CSI0_CLK_M REAR

CAMEAR

56 MIPI_CSI0_LANE1_P REAR

CAMEAR

57 MIPI_CSI0_LANE1_M REAR

CAMEAR

58 GND

59 MIPI_CSI1_LANE0_M FRONT

CAMERA

60 MIPI_CSI1_LANE0_P FRONT

CAMERA



61 MIPI_CSI1_CLK_P FRONT

CAMERA

62 MIPI_CSI1_CLK_M FRONT

CAMERA

63 GND

64 CAM0_MCLK REAR

CAMEAR 26 CAM_MCLK0 GP_PDM_0B

65 CAM1_MCLK FRONT

CAMERA 27 CAM_MCLK1 GP_PDM_1B

66 GND

67 ANT-WIFI/BT ANT-WIFI/BT

68 GND

69 CAM0_RST_N REAR

CAMEAR 1.8V ► 35 CAM1_RST_N

70 PWDN_VCM REAR

CAMEAR 1.8V ► 34

CAM1_STANDB

Y_N

71 CAM1_PWDN FRONT

CAMERA 1.8V 33 CCI_ASYNC0

72 CAM1_RST_N FRONT

CAMERA 1.8V ► 28

WEBCAM_RST_

N GP_PDM_2B



73 CAM_I2C_SCL CAMERA_I2C

_SCL 1.8V 30 BLSP3_I2C_SCL

74 CAM_I2C_SDA CAMERA_I2C

_SDA 1.8V 29 BLSP3_I2C_SDA

75 GPIO_31 1.8V ► 31 CCI_TIMER0 GP_CLK0

76 CAM_FLASH_TORCH_

MODE CAM_FLASH 1.8V 32 CCI_TIMER1 GP_CLK1

77 SENSORS_I2C_SCL SENSORS_I2C

_SCL 1.8V 7 BLSP1_SPI_CLK

BLSP1_UART_RF

R_N BLSP1_I2C_SCL

78 SENSORS_I2C_SDA SENSORS_I2C

_SDA 1.8V 6

BLSP1_SPI_CS_

N

BLSP1_UART_CT

S_N BLSP1_I2C_SDA

79 UART1_MSM_RX 1.8V ► 5 BLSP1_SPI_MIS

O BLSP1_UART_RX BLSP2_SPI_CS3_N

80 UART1_MSM_TX 1.8V 4 BLSP1_SPI_MOS

I BLSP1_UART_TX BLSP3_SPI_CS3_N

81 KEY_VOL_UP_N KEY 1.8V 90 KYPD_SNS0

82 CAM_FLASH_TORCH_

EN 1.8V 93

83 GND

84 ANT_TRX ANT_TRX

85 GND



86 KEY_VOL_DOWN_N KEY 1.8V ► 91 KYPD_SNS1

87 GPIO_92 1.8V ► 92 KYPD_SNS2

88 GPIO_88 1.8V 88 RFFE4_CLK

89 GPIO_89 1.8V 89 RFFE4_CLK

90 GPIO_3 1.8V 3 GPIO_3 MI2S_2_D1

91 GPIO_2 1.8V 2 GPIO_2 MI2S_2_D0

92 GPIO_1 1.8V 1 GPIO_1 MI2S_2_SCK

93 GPIO_0 1.8V 0 GPIO_0 MI2S_2_WS

94 GPIO_98 1.8V ► 98 MI2S_2_MCLK MI2S_1_MCLK_B

95 GPIO_69 1.8V 69 RFFE2_DATA

96 LED_SINK 1.8V 68 RFFE2_CLK

97 I2C_SCL 1.8V ► 112 BLSP2_SPI_CLK BLSP2_UART_RF

R_N BLSP2_I2C_SCL

98 I2C_SDA 1.8V ► 111 BLSP2_SPI_CS_

N

BLSP2_UART_CT

S_N BLSP2_I2C_SDA

99 UART2_MSM_RX 1.8V 21 UIM3_PRESENT BLSP2_SPI_MISO BLSP2_UART_RX

100 UART2_MSM_TX 1.8V 20 UIM3_DATA BLSP2_SPI_MOSI BLSP2_UART_TX

101 GPIO_97 1V8_EN 1.8V ► 97 HDSET_DET BLSP1_SPI_CS1_N

102 GPIO_110 1.8V ► 110 MI2S_1_WS_B



103 ALSP_INT_N 1.8V ► 94 ALSP_INT MI2S_1_SCK_B

104 MAG_INT_N 1.8V ► 36

105 ACCL_INT2_N 1.8V ► 65 MAG_INT BLSP3_SPI_CS2_N

106 ACCL_INT1_N 1.8V ► 96 GYRO_ACCEL_I

NT_N MI2S_1_D1_B

107 GPIO_58 OTG_5V_EN 1.8V ► 58 SMB_INT

108 GPIO_99 1.8V 99 SD_WRITE_PRO

TECT

109 GPIO_95 1.8V ► 95 BLSP3_SPI_CS1_

N MI2S_1_D0_B

110 BLSP6_SPI_CLK 1.8V 11 BLSP6_SPI_CLK

111 BLSP6_SPI_CS_N 1.8V 10 BLSP6_SPI_CS_

N

112 BLSP6_SPI_MISO 1.8V 9 BLSP6_SPI_MIS

O

113 BLSP6_SPI_MOSI 1.8V 8 BLSP6_SPI_MOS

I

114 GPIO_16 1.8V 16 BLSP5_SPI_MOS

I

115 GND



116 ANT_GPS

117 GND

118 GPIO_17 1.8V 17 BLSP5_SPI_MIS

O BLSP2_SPI_CS2_N

119 TS_I2C_SDA TP 1.8V 18 BLSP5_SPI_CS_

N BLSP5_I2C_SDA

120 TS_I2C_SCL TP 1.8V 19 BLSP5_SPI_CLK BLSP5_I2C_SCL

121 FORCE_USB_BOOT FORCE_USB_

BOOT 37 BACKLIGHT_EN

FORCED_USB_BO

OT

122 VDEBUG_1P8V VDEBUG_1P8

V

123 PWR_N ON_OFF

124 RESIN_N RESET

125 VRTC 3V

126 VREG_L6_1P8 VREG_L6_1P8

127 VREG_17_2P85 VREG_17_2P8

5

128 PM_GPIO_4 PM-GPIO_4 PM-GPIO

_4



129 ADC_IN ADC_IN PM-MPP_4 PM-MPP_

4

130 VBAT_THERM VBATTERY

131 GND

132 BB_CLK

133 GND

134 ANT_DRX ANT_DRX

135 GND

136 CDC_EAR_P EAR

137 CDC_EAR_M EAR

138 GND

139 CDC_HPH_R HEADSET

140 CDC_HPH_REF HEADSET

141 CDC_HPH_L HEADSET

142 CDC_HS_DET HEADSET

143 MIC2_P HEADSET

144 GND_MIC HEADSET

145 GND



146 ANT-FM FM_ANT

147 GND

148 MIC1_N PRIMARY

MIC

149 MIC1_P PRIMARY

MIC

150 GND

151 SPKR_DRV_M SPKR

152 SPKR_DRV_P SPKR



2.3 PCB Foot Print

LCC packaging is adopted to package the pins of the AM809 module. Figure 2-2 shows the recommended

PCB foot print. (Unit: mm)

Figure 2-2 PCC foot print recommended for AM809



3 Power Supply Interfaces

3.1 Power Supply Pins

VBAT is the power supply of the module. Its input voltage ranges from 3.5 V to 4.2V and the preferable

value is 3.9V. In addition to digital baseband and analogue baseband, it supplies power for RF power

amplifier. The performance of the VBAT power supply is a critical path to module's performance and

stability. The peak input current at the VBAT pin can be up to 2 A when the signal is weak and the module

works at the maximum transmitting power. The voltage will encounter a drop in such a situation. The

module might restart if the voltage drops lower than 3.5 V.

The pins 2 and 3 are the input of the power supply. Ensure that VBAT is above 3.5 V when the current

burst to 3A. Otherwise, the module will power off. Ensure that the trace between the VBAT pin and the

power supply on PCB board is wide enough to ease the voltage drop in a burst.

Figure 3-1 Current peaks and voltage drops

Keep above 3.5 V

3.5 V

0 ms 3.7 ms 7.4 ms 10.7 ms T

3 A

Voltage

Input

current

3.9 V

Figure 3-2 shows the reference design of the VRTC power supply.



Figure 3-2 Capacitors used for the power supply

AM809

Close to the module

D1 C1 C2 C3 C4 C5

VBATTest point

I_max

Power supply

In Figure 3-2, you can use TVS at D1 to enhance the performance of the module during a burst.

SMF5.0AG (Vrwm=5V&Pppm=200W) is recommended. A large bypass tantalum capacitor (220 μF or

100 μF) or aluminum capacitor (470 μF or 1000 μF) is expected at C1 to reduce voltage drops during

bursts together with C2 (10 μF ceramics capacitor). It is recommended that you add 0.1 uF, 100 pF, and 33

pF filter capacitors to enhance the stability of the power supply.

The module might fail to reset or power on/off in remote or unattended applications, or in an

environment with great electromagnetic interference (EMI). A controllable power supply is preferable

if used in harsh conditions. You can use the EN pin on the LDO or DC/DC chipset to control the switch of

the power supply as shown in Figure 3-3 if a 5V power supply is used.

MIC29302WU in Figure 3-3 is an LDO and outputs 3 A current to ensure the performance of the module.

Figure 3-3 Reference design of power supply control

VCC_IN_5V

VBAT

100 uF

TAN

0.1 uF

TVS

5V10 uF470uF

TAN

10K

4.75K

VOUT

MIC29302WU

EN

VIN ADJ

0.1 uF 100pF 33pF

PWR_EN

The alternative way is to use an enhancement mode p-MOSFET to control the module's power, as shown

in Figure 3-4. When the external MCU detects the exceptions such as no response from the module or the



disconnection of GPRS, power off/on can rectify the module exceptions. In Figure 3-4, the module is

powered on when PWR_EN is set to high level.

Figure 3-4 Reference design of power supply controlled by p-MOSFET

VCC_IN_3.9V VBAT

10K

100K33 pF10 uF

2K

10K

0.1 uF

Q1

R4C1 C2C4 C5 C7

R1

R2

10 uF 0.1 uF

R3

Q2

TVS

5V

470 uF

C3 C6

100pF

S

G

D

PWR_EN

Q2 is added to eliminate the need for a high enough voltage level of the host GPIO. In case that the GPIO

can output a high voltage greater than VCCIN - |VGS(th)|, where VGS(th) is the Gate Threshold Voltage,

Q2 is not needed.

Reference components:

Q1 can be IRML6401 or low Rds(on) pMOSFET which has higher withstand voltage and drain

current.

Q2: a common NPN tripolar transistor, e.g. MMBT3904; or a digital NPN tripolar transistor, e.g.

DTC123. If digital tripolar transistor is used, delete R1 and R2.

C3: 470 μF tantalum capacitor rated at 6.3V; or 1000 μF aluminum capacitor. If lithium battery is

used to supply power, C3 can be 220 μF tantalum capacitor.

Power Supply Protection

Add TVS diodes (VRWM=5 V) on the VBAT power supply, especially in automobile applications. For

some stable power supplies, zener diodes can decrease the power supply overshoot. SMF5.0AG from

ONSEMI is an option.



Line Rules

The width of primary loop lines for VBAT on PCB must be able to support the safe transmission of 2 A

current and ensure no obvious loop voltage decrease. Therefore, the loop line width of VBAT is required 2

mm and the ground level should be as complete as possible.

Separation

The module works in burst mode that generates voltage drops on power supply. Furthermore, this results

in a 217Hz TDD noise through power (One of the way generating noise. Another way is through RF

radiation). Analog parts, especially the audio circuits, are subjected to this noise, known as a "buzz noise"

in GSM systems. To prevent other parts from being affected, it is better to use separated power supplies.

The module shall be supplied by an independent power, like a DC/DC or LDO. See Figure 3-5.

DC/DC or LDO should output rated peak current larger than 2 A.

The inductor used in Reference Design (b), should be a power inductor and have a very low resistance.

The value of 10 μH, with average current ability greater than 1.2A and low DC resistance, is

recommended.

Figure 3-5 Reference designs of separated power supply

Other circuitDC-DC/LDO

AM809DC-DC/LDO

Power

Input

Other circuitDC-DC/LDO

AM809

Power

Input 10 uF

Reference design (a) Reference design (b)

Never use a diode to make the drop voltage between a higher input and module power. Otherwise,

Neoway will not provide warranty for product issues caused by this. In this situation, the diode will

obviously decrease the module performances, or result in unexpected restarts, due to the forward voltage

of diode will vary greatly in different temperature and current.

EMC Considerations for Power Supply

Place transient overvoltage protection components like TVS diode on power supply, to absorb the power

surges. SMAJ5.0A/C could be a choice.



3.2 Power-On

After powering on the VBAT pin, you can use PWR_N to start the module by inputting low-level pulse

for 3 seconds. This pin is pulled up internally. Its typical high-level voltage is 1.8 V. Do not leave this pin

disconnected. The following circuit is recommended to control PWR_N.

Figure 3-6 Push switch controlling

PWR_NR1S1

Figure 3-7 MCU controlling

USER_ONPWR_N

R3

R2

If the module is powered on but the power-on sequence has not been completed, the states of each pin are

uncertain. The power-on sequence of the module is shown as Figure 3-8.

Figure 3-8 AM809 power-on sequence

VBAT

OTHERS

3s

30s

RESIN_N

Not defined



3.3 Hard Reset

The RESIN_N pin is used to reset the module. It triggers module reset when you input low-level pulse for

3 seconds. This pin is pulled up internally. Its typical high-level voltage is 1.8 V. Leave this pin

disconnected if you do not use it. If you use a 2.8V/3.3V IO system, it is recommended that you add a

triode to separate it. Refer to the following design.

Figure 3-9 Reset controlled by button

RESIN_NR1

S1

Figure 3-10 Reset circuit with triode separating

RESIN_N

2V8/3V3R3

R2

0V

VDD_EXT

Q1

In a circuit shown in Figure 3-10, VDD_EXT=2.8V/3.3V/3.0V, R2=4.7K, R3=47K. Figure 3-11 shows

the reset sequence.



Figure 3-11 AM809 reset sequence

VBAT

OTHERS

3s

Not defined

RESIN_IN

40s

3.4 Hard Power-off

The PWR_N input pin can be used to hard power off the module. Low-level pulse input for 13 seconds

can trigger the power-off of the module. This pin is pulled up internally. Its typical high-level voltage is

1.8 V. Leave this pin disconnected if you do not use it. If you use a 2.8V/3.3V IO system, it is

recommended that you add a triode to separate it. Refer to 3.3 Hard Reset. Figure 3-12 shows the hard

power-off sequence.

Figure 3-12 AM809 power-off sequence

VBAT

OTHERS

13s

PWR_N

Not defined



3.5 VRTC Power Supply

Pin Signal I/O Function Remarks

125 VRTC I/O RTC power supply 2V to 3.25V, typical value 3V

VRTC is the pin that supplies power for the internal RTC. A 22 μF capacitor is connected to VRTC

internally to make it invalid when you replace the power supply (battery) of the module. The module will

update the RTC clock after it is powered on and connected to the network.

Figure 3-13 shows the internal design of the VRTC pin.

Figure 3-13 VRTC design in the module

AM809AM809

RTC

Circuit++

22µF

Backup

battery

3.6 Battery Management

Our AM809 module supports battery charging. For information about how to select proper battery, refer to

GB /T18287-2000 Chinese National Standard for Lithium Ion batteries for mobile phones. Available

voltages range between 3.5V to 4.2V. It is recommended that you connect ESD and capacitors to VBAT

and BAT_THERM in parallel in case that abnormal electrical signal might damage the module.

PDA, mobile POS and other mobile devices all use battery as power supply. For different batteries, you

need to modify the charging/discharging curve in the software. AM809 provides two pins for battery.


2, 3 VBAT Power supply input 3.5V~4.2V

130 VBAT_THERM Battery temperature check



Ensure that the BAT_THERM pin is connected. Otherwise, the battery might fail to charge or the

remaining power is displayed incorrectly. Figure 3-14 shows the connection of the battery pins.

Figure 3-14 Battery connections

AM809

VREF_BAT_THM

VBAT_THERM

PMIC

VBAT

R1

R2

R_

ID

R_

TH

GND

Battery

Module

C1 C2TVS



4 Video I/O Interfaces

AM809 video I/O interfaces are developed based on Mobile Industry Processor Interface (MIPI) standard

to transmit high-speed digital signals. This standard is widely supported by main device manufacturers. So

it is easy to get video devices that support this standard.

4.1 LCD Interfaces

LCD interfaces are the video output interfaces of the AM809 module, developed based on the MIPI_DSI

standard. They support four groups of high-speed differential data transmission, each of which can

achieve a rate of at most 1.5 Gbps. You can configure different quantity of MIPI_DSI as required. The

following sections will describe the hardware configuration of WVGA and 720P display.

4.1.1 WVGA

The resolution of WVGA display is 800 x 480, which requires two groups of MIPI_DSI. LCD design is

generally to connect FPC to the connector. Table 4-1 shows describes the LCD pin.

WVGA LCD description


37 LCD_DIF DI ID

38 LCD_RST_N DO

43 MIPI_DSI0_CLK_M DO MIPI

44 MIPI_DSI0_CLK_P DO MIPI

41 MIPI_DSI0_LANE1_P DO MIPI

42 MIPI_DSI0_LANE1_M DO MIPI



39 LCD_TE DO

127 VREG_L17_2P85V AO AO

126 VREG_L6_1P8 AO AO

/ LED_K AI Anode of backlight boost converter



/ LED_A AO Cathode of backlight boost converter

/ VEXT_2P85V AO LDO output

35 TS_RST_N DO Reset touchscreen

120 TS_I2C_SCL DO I2C clock

119 TS_I2C_SDA DIO I2C data

34 TS_INT_N DI Touchscreen interrupt

In your design, add common mode chokes to the MIPI circuit to reduce the electromagnetic interference.

Figure 4-1 shows the reference circuits with common mode choked. Please refer to 4.4 Design Cautions.

Figure 4-1 Reference MIPI circuits with common mode chokes

MIPI_DSI0_LANE1_M

MIPI_DSI0_LANE1_P

MIPI_DSI0_D1_M_LCD

MIPI_DSI0_D1_P_LCD

FL1

MIPI_DSI0_CLK_M

MIPI_DSI0_CLK_P

MIPI_DSI0_CLK_M_LCD

MIPI_DSI0_CLK_P_LCD

FL1

MIPI_DSI0_LANE2_M

MIPI_DSI0_LANE2_P

MIPI_DSI0_D2_M_LCD

MIPI_DSI0_D2_P_LCD

FL1



Figure 4-2 shows the backlight driver circuit.

Figure 4-2 AM809 LCD backlight chipset

VBATT_FET

10uF

LX1 uF

OVPGND

VIN

APW7209

EN

1

52

6

FBWLED_PWM

100K

22uH

12Ω

120Ω±25%（@100MHz）

120Ω±25%（@100MHz） LED_K4 3

LED_A

DCDC is used to drive LCD backlight and powered by external power supply. The brightness is

controlled by the PWM wave that the module outputs. It is recommended that you use independent LDO

to supply power for the backlight to get the complete control of the power supply and reduce the standby

power consumption. 2.85V LDO circuit is recommended to drive IC inside LCD.

Figure 4-3 Power supply of AM809 LCD driver

EXT_2P8V_EN

1 µF

VOUT

2.2uF

GNDCE

VDD

SGM2036VBATT_FET

GND

100K

VEXT_2P85V1

2

5

3

4

DNI-0Ω VREG_L17_2P85V

Figure 4-4 shows the reference design of the customized 4.5' LCD interface.

4.5' QHD

NT35516 driver IC



480*800

240 dpi

Capacitive multi-touch

See Figure 4-4.

Figure 4-4 Reference design of LCD interface

LCD connector

2524

2322

2120

1918

1716

1514

13

9

1112

10

8

6

4

2

7

5

3

1

27

26

220Ω±25%（@100MHz）

LCD_DIF

LCD_RST_N

VREG_L19_2P85

LED_A

TS_I2C_SCL

0.1uF 1uF

0.1uF1uF 0.1uF

V

AV

L-5

.5V

-10

0P

F

1uF

1 2 3

4 5

FV1

V

LCD_ID

MIPI_DSIO_D2_M_LCD

MIPI_DSIO_CLK_M_LCD

MIPI_DSIO_D1_M_LCD

LCD_TE

VREG_L14_1P8V

LED_K

TS_RST_N

TS_I2C_SDA

MIPI_DSI0_D2_P_LCD

MIPI_DSI0_CLK_M_LCD

MIPI_DSI0_D1_P_LCD

VEXT_2P85V

TS_INT_N

AV

L-5

.5V

-10

0P

F

4.1.2 720P

The 720p format requires four groups of MIPI_DSI. You can refer to the WVGA design. Table 4-2 shows

the LCD pins required in the 720p design.

720P LCD pins


37 LCD_DIF DI ID

38 LCD_RST_N DO

44 MIPI_DSI0_CLK_P DO MIPI

43 MIPI_DSI0_CLK_M DO MIPI











39 LCD_TE DO

127 VREG_L17_2P85V AO AO

126 VREG_L6_1P8 AO AO

/ LED_K AI Anode of backlight boost converter

/ LED_A AO Cathode of backlight boost converter


35 TS_RST_N DO Reset touchscreen

119 TS_I2C_SDA DO I2C clock

120 TS_I2C_SCL DIO I2C data

34 TS_INT_N DI Touchscreen interrupt

4.2 TP Interfaces

TP and LCD cannot be the FPC interface. Table 4-3 lists the TP pins. Figure 4-5 shows the reference

design of customized 4.5' TP interfaces, in which ESD protection array is added. The recommended ESD

models include NZQA5V6AXV5T1G, CESDLC3V0L4, PESD3V3V4UW, etc.

TP pins


/ CAM_1P8V AO Power output


35 TS_RST_N DO Reset TP



119 TS_I2C_SDA DO I2C clock

120 TS_I2C_SCL DIO I2C data

34 TS_INT_N DI TP interrupt

Figure 4-5 Reference design of TP interface

TP connector

8

6

4

2

7

5

3

1

9 10

1uF

V

AV

L-5

.5V

-100P

F

V

AV

L-5

.5V

-10

0P

F

1 2 3

FV1

1uF0.1uF 0.1uF

47KΩ DNI-47KΩ

4 5

VEXT_2P85V

CAM_1P8V

CAM_1P8V

TS_RST_N

TS_I2C_SCL

TS_I2C_SDA

TS_INT_N

4.3 Camera Interfaces

The video input interfaces of the module is developed based on the MIPI_CSI standard, and support two

cameras, among which the pixel can be at most 8MP. The quality of video and photo is dependent on the

camera sensor, the camera specifications, and other factors. You can select cameras compliant with your

application scenarios based on the list of camera specifications that we have commissioned.

Neoway commissioned the following camera models:

Main camera: OV5670 (5MP), optional, OV5648 (5MP)

Sub camera: OV2680(2MP)



4.3.1 Main Camera

The main camera transmits data and is controlled through FPC and connector. It uses two groups of

MIPI_CSI differential data interfaces, and support at most 8MP. Table 4-4 lists pins of the main camera.

Main camera pins


52 MIPI_CSI0_LANE0_P MIPI

53 MIPI_CSI0_LANE0_M MIPI

54 MIPI_CSI0_CLK_P MIPI

55 MIPI_CSI0_CLK_M MIPI

56 MIPI_CSI0_LANE1_P MIPI

57 MIPI_CSI0_LANE1_M MIPI

69 CAM0_RST_N Reset

64 CAM0_MCLK Clock

74 CAM _I2C_SDA I2C data

73 CAM _I2C_SCL I2C clock

/ VEXT_2P85 LDO output

/ VEXT_CAM_1P2V LDO output

/ VEXT_CAM_1P8V LDO output

LDO supplies power for VEXT_2P85, VEXT_CAM_1P2V, and VEXT_CAM_1P8V. The recommended

LDO models are respectively:

RP100K281B5-TR, RP100K281D5-TR, RP100K281D-TR, XC6221A282GR, XC6221B282GR;

RP100K121B-TR, TK68112AMFG0L-C, XC6221A122GR, XC6221B122GR;

RP100K181D-TR, TK64118AMFGOL-C, XC6221A182GR, RP100K181B-TR, XC6221B182GR.

Figure 4-6 shows the reference design of the 8MP main camera.



Figure 4-6 Reference design of the main camera interface

Main camera

connector

12

34

56

78

910

1112

13

17

1514

16

18

20

22

24

19

21

23

25

27

26

0Ω

VEXT_2P85V

CAM0_RST_N/BLSP3_SPI_CS_N

MIPI_CSI0_CLK_M

CAM_I2C_SCL

MIPI_CSI0_LANE1_M

1uF 1uF0.1uF2.2uF

1uF

CAM_I2C_SDACAM0_MCLK

DGND

DGND

MIPI_CSI0_LANE1_P

MIPI_CSI0_CLK_PMIPI_CSI0_LANE0_M

MIPI_CSI0_LANE0_P

PWDN_VCM

VREG_L6_1P8EXT_1V2_DVDD

VEXT_2V85_AVDD

4.3.2 Sub-Camera

Sub-camera uses one group of MIPI_CSI differential signal, and supports 2MP cameras. Table 4-5 lists

sub-camera pins.

Sub-camera pins


59 MIPI_CSI1_LANE0_M DO MIPI

61 MIPI_CSI1_CLK_P DO MIPI

72 CAM1_RST_N DO RESET

60 MIPI_CSI1_LANE0_P DO MIPI

62 MIPI_CSI1_CLK_M DO MIPI

73 CAM _I2C_SCL O I2C clock

74 CAM _I2C_SDA IO I2C data

65 CAM1_MCLK O Clock

/ VEXT_2P85V O LDO output

/ VEXT_CAM_1P8V O LDO output



VEXT_2P85V and VEXT_CAM_1P8V are powered by LDO. For information about how to select the

proper model, see 4.3.1Main Camera.

Figure 4-7 shows the reference design of 2MP camera.

Figure 4-7 Reference design of sub-camera interface

Sub camera connector

13

12

11

10

9

8

7

6

5

4

3

2

1

14

15

0.1

uF

2.2

uF

0.1

uF

1u

F

VEXT_2P85V

VREG_L6_1P8

CAM1_RST_N/BLSP4_SPI_CLK

CAM_I2C_SCL

CAM_I2C_SDA

CAM1_MCLK1

MIPI_CSI1_LANE0_P

MIPI_CSI1_LANE0_M

MIPI_CSI1_CLK_M

MIPI_CSI1_CLK_P

CAM1_PWDN

EXT_1V2_DVDD

2.2

uF

0.1

uF

4.3.3 Design Cautions

Please note the scanning direction of the camera, the aiming direction, and angle of the camera lens, the

scanning method of the LCD when it reads data.

LCD is generally designed in two ways: vertical scan and horizontal scan. LCD is generally designed in

two ways: vertical scan and horizontal scan.

Figure 4-8 Scan direction of 3264*2448 LCD



Generally, our customized LCD supports horizontal scan. Figure 4-9 shows the reference design of our

customized camera.

Figure 4-9 Reference design of customized camera

Images from the camera to the LCD can be adjusted in only four ways:

Figure 4-10 Adjustment of camera sensor



Images can be displayed correctly only when the camera sensor and the LCD scan in the same direction.

If the camera sensor and LCD scan in different directions, the image will be mirrored.

4.3.4 Camera Power Supply

LDO supply power for cameras separately. For the recommended models, see 4.3.1Main Camera. The

1.8V LDO circuit is used for the reference IC level inside the camera. Figure 4-11 shows the reference

circuit.

Figure 4-11 Reference design of the main camera power supply

EXT_2P8V_EN

1 uF

VOUT

2.2uF

GNDCE

VDD

SGM2036VBATT_FET

GND

100K

VEXT_2P85V1

2

5

3

4

DNI-0Ω VREG_L17_2P85V

1.2V level input is required for main camera. Figure 4-12 shows the reference design.

Figure 4-12 Reference design of the main camera power supply

EXT_1V2_ENEXT_1V2_EN

1 uF1 uF

VOUT

2.2uF2.2uF

GNDCE

VDD

SGM2360VBATT_FETVBATT_FET

GND

DNI-100KDNI-100K

1

2

5

3

4EXT_1V2_AVDD

AM809 has specific enable control pins for each LDO circuit. The voltage varies with the cameras. For

details, see the reference design.



4.4 Design Cautions

Please note the definition of the video interfaces and ensure the correct connection between the connector

and components.

The MIPI transmission rate can reach 1.5 Gbps. Use 50Ω design rules to achieve a differential impedance

of 100 Ω for the differential pair of traces, which must be routed on the inner layer to isolate from other

signal traces. Keep length matching for the MIPI traces of one video component. Reserve 1.5 times of

trace width between MIPI traces. It is recommended that you lay all MIPI traces on the same layer.



5 Audio Interface

AM809 provides a few groups of audio input/output interfaces to meet your requirements in different

applications.

5.1 Audio Input

Table 5-1 lists the three groups of audio input pins.

Audio input pins


148 MIC1_N AI Negative electrode of MIC1 output Main MIC

149 MIC1_P AI Positive electrode of MIC1 output Main MIC

143 MIC2_P AI Positive electrode of MIC2 output Supplement MIC

Figure 5-1 shows the differential connection of the peripheral. A bias circuit is embedded for the audio

input pins. TVS in Figure 5-1 can be replaced by AVLC5S02100 and SDV1005E5R5C800NPTF.

Figure 5-1 Reference design of MIC connection

AM809

33 pF

MIC

33 pF

33 pF

MICN

MICP

TVS TVS

1800Ω±25%（@100MHz）

1800Ω±25%（@100MHz）

5.2 Audio Output

AM809 provides a few groups of audio output interfaces, including speaker, receiver, and headphone.

Table 5-2 lists the audio output pins.



Audio output pins


136 CDC_EAR_P AO Positive electrode of receiver output

137 CDC_EAR_M AO Negative electrode of receiver output

151 SPKR_DRV_M AO Negative electrode of speaker output

152 SPKR_DRV_P AO Positive electrode of speaker output

The speaker pins support Class D amplifier and differential output. The typical speaker output power is

1.4W/0.95W@8Ω when the battery supplier 5V/4.2V, 2W/1W@4Ω when the battery supplier 5V/3.6V.

The speaker can provide overburst protection and noise rejection.

Figure 5-2 shows the reference design of the audio output pins.

Figure 5-2 Reference design of EAR/SPK connections

33 pF

33 pF

EAR/SPK-

EAR/SPK+

33 pF

AM809

EAR/SPK

1800Ω±25%（@100MHz）

1800Ω±25%（@100MHz）

TVSTVS

5.3 Headphone Interfaces

The module provides fixed pins to achieve the headphone function. AM809 supports class AB headphone

amplifier and three headphone control buttons. Table 5-3 lists the headphone pins.

Headphone pins


141 CDC_HPH_L AO Left sound channel of the earphone output

140 CDC_HPH_REF Headphone output level

139 CDC_HPH_R AO Right sound channel of the earphone output



143 MIC2_P AI Audio input of MIC2, used for single-end

headphone input

142 CDC_HS_DET DI Headphone detection

Figure 5-3 shows the reference design of the headphone circuit.

Figure 5-3 Reference design of headphone without FM

34

1

52 V V

10K

1000Ω±25%（@100MHz）

1000Ω±25%（@100MHz）

1000Ω±25%（@100MHz）

1000Ω±25%（@100MHz）

1000Ω±25%（@100MHz）

1000Ω±25%（@100MHz）

V

10K

33pF

470pF

AV

L-5

.5V

-10

0P

F

AV

L-5

.5V

-10

0P

F

AV

L-5

.5V

-10

0P

F

470pF

DNI-33pF

PE

SD

5V

0S

1B

L

耳机座

MIC2_P

CDC_HPH_RCDC_HPH_L

CDC_HS_DET

CDC_HPH_REF

Figure 5-4 shows the circuits of headphone out of position and in position.



Figure 5-4 Headphone interface

Please note if headphone you select is CTIA or OMTP. The connections of ① and ② are reverse for the

two type of headphones. The CDC_HS_DET pin (⑤ in the above figure) is left disconnected (pulled up

internally) if the headphone is not plugged. After the headphone is plugged, this pin is connected to GND

through the left channel (8/16/32 Ω) loudspeaker of the headphone.

5.4 Audio Design Cautions

The audio signal traces should be wide enough on the PCB to bear large current when the module output

audios at the highest volume. The traces should be isolated from digital signals and clock as well as other

analog signal traces.No signal trace crossing is allowed.Reserve enough grounding holes and ground

protection.

Do not connect the audio output pins to GND.



6 Peripheral Interfaces

6.1 USB Interface

You can download programs for AM809 and establish data connections through the USB interface. If the

module is used only as USB Device, the recommended USB circuit is shown in Figure 6-1.

Figure 6-1 USB circuit(without OTG)

Micro USB

VBUS_USB_IN

22PF E

SD

9X

5V

U

ES

D9X

5V

U

PE

SD

5V

0S

1B

L

DNI-18PF

0Ω

0Ω

USB_DM

USB_DP

USB_HS_ID

1UF

Parallel a 1μF and 22pF filter capacitors to the VBUS_USB_IN pin as close to the pin as possible. TVS

components are required for the VBUS power line. The junction capacitance of the TVS protection diodes

for USB_DP and USB_DM should be lower than 12pF as possible. USB data lines adopt differential trace

design, in which the differential impedance is limited to 90 Ω characteristics impedance. Isolate the traces

from other signal traces.

Figure 6-2 USB circuit (with OTG)

USB_DMUSB_DM

USB_DPUSB_DP

GNDGNDUSB_HS_IDUSB_HS_ID

0Ω0Ω

0Ω0Ω

ES

D9X

5V

U

ES

D9X

5V

U

GPIOGPIO

VBATVBAT VBATVBAT

VINVINAW3610AW3610

SWSW1UH1UH

ES

D9X

5V

U

ES

D9X

5V

U

VBUS_USB_INVBUS_USB_IN

MICRO USBMICRO USB

USB_HS_IDUSB_HS_IDUSB_DPUSB_DP

USB_DMUSB_DM

VBUS_USB_INVBUS_USB_IN PE

SD

5V

0S

1B

LP

ES

D5V

0S

1B

L

ENEN

VOUTVOUT

VOUTVOUTGNDGND

AM809AM809

22PF22PF 1UF1UF



AM809 supports USB OTG. You can refer to the above circuit if you need the USB OTG function. You

can select the DC-DC model based on your requirements.

6.2 UIM Card Interface

AM809 supports 1.8V/2.85V SIM cards. AM809 allows dual SIM cards. VREG_UIM is the power supply

pin of the SIM card and its maximum load is 30 mA. An internal pull-up resistor is embedded for the

UIM_DATA pin. You do not need to add any external pull-up resistor. UIM_CLK is the clock signal pin,

supporting 3.25 GHz of clock frequency. Figure 6-3 shows the reference design of the SIM card interface.

Figure 6-3 Reference design of SIM card interface

1 uF

UIM_DATA

UIM_CLK

UIM_RST

VREG_UIM

AM809

CLK

RST

VCC

VPP

GND

SIM card

DATA

GNDSIM-DetUIM_DETECT

10K

ESD protectors, such as ESD diodes or ESD varistors (with a junction capacitance of less than 33 pF), are

recommended on the SIM signals, especially in automotive electronics or other applications with badly

ESD. Replace the ESD diodes with 27 pF to 33 pF capacitors connecting to GND in common applications.

The ESD diodes or small capacitors should be close to SIM card.

AM809 supports SIM card detection. SIM1_DETECT/ SIM2_DETECT are 1.8V interrupt pins. Low

level means SIM card detected while high level mean no SIM card detected.

The antenna should be installed far away from the SIM card and SIM card traces, especially to the

build-in antenna.

The SIM traces on the PCB should be as short as possible and shielded with GND copper.

The ESD protection diodes or small capacitors should be closed to SIM card on the PCB.



6.3 SDIO

AM809 supports SD/MMC cards of 4-bit mode, or devices based on the SDIO protocol and the latest

SDIO 3.0 protocol.

6.3.1 SD Card

Figure 6-4 shows the reference design of the camera power supply.

Figure 6-4 Reference design of TF card interface

DAT2

CD/DAT3

CMD

VDD

TF connector

CLK

VSS

DAT0

DAT1

GND

GND

GND

GND

1 2 3

4 5

1 2 3

4 5

FV1 FV2

0.1

uF

4.7

uF

VREG_SDC_PWR

SDC2_DATA2

SDC2_DATA3

SDC2_CMD

SCD2_CLK

SCD2_DATA0SCD2_DATA1

Table 6-1 lists TF card pins.

TF card pins


26 VREG_SDC_PWR PWR SDIO driver power supply, supporting dual voltage

of 1.8V and 2.95V, maximum current 500 mA VDD

25 SDC2_CMD O Command line, impedance line recommended CMD

27 SDC2_CLK O High-speed digital clock CLK

28 SDC2_DATA0 IO High-speed data line DATA0




30 SD_CARD_DET_N I SD card detection, low-level interrupt /



VREG_SDC_PWR is the power supply pin of the SD card. It supports a maximum current of 500mA and

dual-voltage of 1.8V/2.95V. The recommended trace width is 0.5 mm. Parallel 0.1 μF and 4.7 μF

capacitors to the SD card.

CMD, CLK, DATA0, DATA1, DATA2 and DATA3 are high-speed signal lines. Limit their characteristics

impedance to 50Ω and do not let them cross any other traces. Keep length matching for CMD, DATA0,

DATA1, DATA2 and DATA3 traces. CLK trace should be ground separately.

6.3.2 SD Peripheral Interface

SDIO interface can connect other peripherals. Refer to the SD card connection design, and connect the

module pin to the peripheral pin directly. PCB layout is similar to the SD card design.

6.4 GPIO

AM809 supports multiple standards including UART, I2C, and SPI. You can configure the GPIO to meet

your requirements for connecting to different devices. For the open multi-function GPIO interface, please

inquiry our technical support engineers. The level of the module interface is 1.8 V. Table 6-2 lists GPIO

pins.

Pin Description

Pin Signal Function Function 1 Function 2 GPIO

32 GPIO_15 GPIO_15 BLSP4_SPI_CLK GP_CLK_2B 15

33 GPIO_14 GPIO_14 BLSP4_SPI_MISO GP_CLK_1B 14

34 TS_INT_N TS_INT_N BLSP4_SPI_MISO GP_CLK_3B 13

35 TS_RST_N TS_RST_N BLSP4_SPI_MOSI GP_CLK_2B 12

77 SENSORS_I2C_SCL SENSORS_I2C_SCL BLSP1_SPI_CLK BLSP1_UART_RFR_N 7

78 SENSORS_I2C_SDA SENSORS_I2C_SDA BLSP1_SPI_CS_N BLSP1_UART_CTS_N 6

79 UART1_MSM_RX UART1_MSM_RX/ BLSP1_SPI_MISO BLSP1_UART_RX 5

80 UART1_MSM_TX UART1_MSM_TX/ BLSP1_SPI_MOSI BLSP1_UART_TX 4

90 GPIO_3 GPIO_3 MI2S_2_D1 3

91 GPIO_2 GPIO_2 MI2S_2_D0 2

92 GPIO_1 GPIO_1 MI2S_2_SCK 1

93 GPIO_0 GPIO_0 MI2S_2_WS 0



97 I2C_SCL I2C_SCL BLSP2_SPI_CLK BLSP2_I2C_SCL 112

98 I2C_SDA I2C_SDA BLSP2_SPI_CS_N BLSP2_I2C_SDA 111

99 UART2_MSM_RX UART2_MSM_RX BLSP2_SPI_MISO BLSP2_UART_RX 21

100 UART2_MSM_TX UART2_MSM_TX BLSP2_SPI_MOSI BLSP2_UART_TX 20

110 BLSP6_SPI_CLK BLSP6_SPI_CLK BLSP6_SPI_CLK 11

111 BLSP6_SPI_CS_N BLSP6_SPI_CS_N BLSP6_SPI_CS_N 10

112 BLSP6_SPI_MISO BLSP6_SPI_MISO BLSP6_SPI_MISO 9

113 BLSP6_SPI_MOSI BLSP6_SPI_MOSI BLSP6_SPI_MOSI 8

114 GPIO_16 GPIO_16 BLSP5_SPI_MOSI 16

118 GPIO_17 GPIO_17 BLSP5_SPI_MISO 17

119 TS_I2C_SDA TP BLSP5_SPI_CS_N 18

120 TS_I2C_SCL TP BLSP5_SPI_CLK 19

6.4.1 UART

AM809 provides two groups of UART interfaces, which support 4Mbps at most. The reference high level

is 1.8V. Figure 6-5 shows the reference design of the UART interface.

Figure 6-5 Reference design of the UART interface

AM809

URXD

UTXD

Client

UTXD

URXD

If the UART is interfacing with a MCU that has 5 V logic levels, it is recommended that you add a level

shifting circuit outside of the module as shown in Figure 6-6.



Figure 6-6 Recommended circuit for the communication between 5V MCU and UART

OUTPUT

VCC_IN VCC_OUT

4.7K 10KR2 R3

INPUT Q1

Components:

R2: 2K-10K. The greater the UART baudrate is, the lower the R2 value is.

R3: 4.7K-10K The greater the UART baudrate is, the lower the R3 value is.

Q1: MMBT3904 or MMBT2222 High-speed transistor is better.

Logic level DTE 5V —> DCE 1.8V:

Figure 6-6 shows the circuit between MCU TXD and module RXD. The INPUT pin is connected to MCU

TXD and OUTPUT is connected to RXD of the module. VCC_IN supplies 5V and VCC_OUT supplies

1.8V.

The circuit between MCU RXD and module TXD can also adopt the connection in Figure 6-6. The

INPUT pin is connected to module TXD and OUTPUT is connected to MCU RXD. VCC_IN supplies

1.8V and VCC_OUT supplies 5V.

6.4.2 I2C

AM809 provides one group of I2C interfaces, which support the host mode only. The I2C interfaces are

open-drain driven (pull-up resistor is mandatory for the external circuit). They support a maximum rate of

3.4 Mbps and their reference high level is 1.8V. Figure 6-7 shows the reference design of the I2C

interfaces.

Figure 6-7 Reference design of I2C

2.2K 2.2K

1.8V

I2C-SCL

I2C-SDA

I2C-SCL

I2C-SDA



6.4.3 SPI

AM809 provides a group of SPI interfaces, which support the host mode only. The maximum rate is

52MHz, and the reference high level is 1.8V. Figure 6-8 shows the reference design of SPI interfaces.

Figure 6-8 Reference design of the SPI

SCLK

SS

MISOAM809

MOSI

GND

Master

SCLK

SS

MISO

MOSI

GND

Slave

TXS0104E or NLSX4373MUTAG is recommended if you need level shifter to shift the level of the

UART, IIC, SPI, etc. Do not connect interfaces of different level standards directly. Otherwise, the module

might be damaged.

6.5 ADC

AM809 provides only ADC channel. ADC pin supports highest precision of 10-bit. Table 6-3 lists the

ADC pins.

ADC pin


129 ADC_IN AI ADC pin Reference voltage: 1.25V

130 VBAT_THERM AI Battery temperature check The battery cannot be charged till this

pin is connected.

6.6 Other Interfaces

AM809 also provides motor driver interface and key backlight driver interface to meet the requirements

for mobile device applications.

Motor is driven by specific circuit. Figure 6-9 shows the reference design of the motor circuit.

http://192.168.2.61/coremail/XT3/mbox/viewmail.jsp?sid=BAxSyUjjoWbvisDqLRjjhzyyIQghZkTC&fid=1&page_no=6&fid=1&offset=100&mid=1%3A1tbiAQAND1KpSFsFQQABsu&scheduledate=



Figure 6-9 Reference design of motor circuit

Motor

interface

+

2.2pF

33pF

0Ω

0.1uF

0ΩVBATT_FET VIB_DRV_N

33pF

The diode loop can release the electricity on the motor to protect the component when the VIB_DRV_N

stops driving.



7 RF Interface

7.1 2G/3G RF Design and PCB Layout

RF_ANT_TRX is the antenna pin of AM809. A 50 Ω antenna is required. VSWR ranges from 1.1 to 1.5.

The antenna should be well matched to achieve best performance. It should be installed far away from

high speed logic circuits, DC/DC power, or any other strong disturbing sources.

A 50 Ω antenna is required. VSWR ranges from 1.1 to 1.5. The antenna should be well matched to

achieve best performance.

For multiple-layer PCB, the trace between the antenna pad of module and the antenna connector, should

have a 50 Ω characteristic impedance, and be as short as possible. The trace should be surrounded by

ground copper. Place plenty of via holes to connect this ground copper to main ground plane, at the copper

edge.

If the trace between the module and connector has to be longer, or built-in antenna is used, a π-type

matching circuit is needed, as shown in Figure 7-1.

Figure 7-1 Reference of antenna matching design

Big RF solder pad can result in great parasitic capacitance, which will affect the antenna performance.

Remove the copper on the first and second layers under the RF solder pad.

Figure 7-2 Recommended RF PCB design



If you adopts RF antenna connections, the GSC RF connector MM9329-2700RA1 from Murata is

recommended. Figure 7-3 shows the encapsulation specifications.

Figure 7-3 Encapsulation specifications of Murata RF connector

RF antenna can also be connected to the module by soldering. In this manner, you must ensure proper

soldering in case of damage that lowers RF performance. Figure 7-4 shows the pictures of these two

connections.

Figure 7-4 RF connections

7.2 WIFI/BT RF Design and PCB Layout

On AM809, WiFi and BT share the same antenna interface, which requires an antenna with 50Ω

impedance. The antenna can be 2.4GHz PCB trace antenna, ceramic chip antennas, or Magnetic Antenna.

It should be installed far away from high-speed logic circuits, DC/DC power, or any other strong

disturbing sources if you use RF cable to connect.

It is recommended that you add an ESD protection diode to the antenna interface in an environment with

great electromagnetic interference and other applications with badly ESD. The ESD protection diode must

have ultra-low capacitance (lower than 0.5 pF). Otherwise, it will affect the impedance of the RF loop or

result in attenuation of RF signals. RCLAMP0521P from Semtech or ESD5V3U1U from Infineon is

recommended.

In PCB design, the RF trace between the antenna pad of module and the antenna connector, should have a

50 Ω characteristic impedance, and be as short as possible. The trace should be surrounded by ground

copper.



The distance between the RF traces and ground copper should be twice of the RF trace width. Dig as

many ground holes as possible on the copper to ensure lowest grounding impedance.

It is recommended that you set the matching circuit before installing the antenna. You can select any type

of circuits shown in Figure 7-1. T1 is an ESD protection diode, which is optional.

You can use PCB trace antenna or ceramic chip antennas for the WiFi/BT RF.

For the detailed design of the 2.4G antenna, refer to TI's Antenna Selection Quick Guide.

For how to use 2.4G ceramic chip antenna, refer to Application Note AN048 Bluetooth, 802.11b/g WLAN

Chip Antenna. You can also select SLDA52-2R540G-S1TF from Sunlord.

Figure 7-5 shows the layout of the 2.4G ceramic chip antenna. SLDA52-2R540G-S1TF is used as an

example.

Figure 7-5 Antenna layout

If your PCB is large enough, you can adopt the layout shown in Figure 7-5 (a).

1 Chip antenna

2 Feeder

3 Pad of the matching circuit

4 50Ω transmission line (calculated using Si9000

or APPCAD)

Figure 7-5 shows the area between the antenna and the ground Figure 7-6 shows the clearance if this area.

Figure 7-6 Clearance around the antenna



For more details, refer to the antenna manufacturer's product documents.

On the PCB, keep the RF signals and RF components away from high-speed circuits, power supplies,

transformers, great inductors, the clock circuit of single-chip host, etc.

7.3 GPS RF Design and PCB Layout

7.3.1 GPS Impedance

The 116th pin is the GPS interface of the module, which also requires a 50 Ω. The PCB layout for GPS is

similar to that for GPRS. For details, refer to the previous section. Figure 7-7 shows the internal structure

of the GPS RF.

Figure 7-7 GPS RF structure

WCN IC

SAW

ANT_GPS

LAN

In addition to the basic rules, the GPS routing has higher requirements because the air wireless GPS signal

has lower strength, which results in weaker electrical signal after the antenna receives. Weaker signals are

more susceptible to interference. Therefore, active antenna are commonly used for GPS. The active GPS

antenna amplifies the weak signals received to stronger signals through the low-noise amplifier (LNA)

and then transmits the signals through the feeder.

If the antenna and layout are not designed reasonably, the GPS will be insensitive, resulting in long time

on positioning or inaccurate position.

Keep the GPRS and GPS far away from each other in layout and antenna layout.



7.3.2 Active GPS Antenna Design

Ceramic GPS chip antenna are commonly used. In general, it is recommended that you use the active

ceramic antenna. After the antenna receives GPS satellite signals, the LNA amplifies them first and then

they are transmitted to the 116th pin (GPS_ANT) through the feeder and PCB traces. 50Ω resistance is

required for both the feeder and PCB traces and the traces should be as short as possible. The power

supply of the active antenna is fed by the 100 nH inductance through the signal traces.

Common active antenna requires 3.3V to 5V power supply. Though the active antenna has a low power

consumption, it requires stable and clean power supply. You are advised to use high-performance LDO to

supply power for the antenna through a 100 nH inductance, as shown in 7.4 FM RF Design and PCB

Layout.

Figure 7-8 Power supply reference for active antenna

LNA

Active

Antenna

AM809

LDOPWR_input

22uF 33pF

100nH

33pF50Ω impedance line

You need to add coupling capacitors if you use the active antenna because no coupling capacitor is

designed for 116th pin (GPS_ANT) inside the module.

7.3.3 Passive GPS antenna design reference

If you use a multiple-layer PCB and are experienced in RF design, use a passive ceramic ship antenna or

other types of GPS antenna design. This method might reduce the BOM cost but require high skills to



produce a reliable working board. Figure 7-9 shows a reference design of the passive GPS circuit (the 33

pF capacitor can be omitted).

Figure 7-9 Passive GPS antenna design reference

LNA

Passive

Antenna

AM80933pF50Ωimpedance line

It is recommended that you add an ESD protection diode to the antenna interface in an environment with

great electromagnetic interference and other applications with badly ESD. The ESD protection diode must

have ultra-low capacitance (lower than 0.5 pF). Otherwise, it will affect the impedance of the RF loop or

result in attenuation of RF signals. RCLAMP0521P from Semtech or ESD5V3U1U from Infineon is

recommended.

On the PCB, keep the RF signals and RF components away from high-speed circuits, power supplies,

transformers, great inductors, the clock circuit of single-chip host, etc.

7.4 FM RF Design and PCB Layout

FM antenna has been matched inside the module. Connect the FM antenna pin to the FM antenna through

a 50Ω RF impedance line. For the antenna layout, refer to the design manual of the component.

FM signal can be received through the headphone cable, which is used as the FM antenna. Connect the

FM antenna to the headphone GND pin. Figure 7-10 shows the reference design of the headphone circuit

that supports FM function.



Figure 7-10 Reference design of the headphone circuit with FM function

34

1

52 V V

10K

1000Ω±25%（@100MHz）

1000Ω±25%（@100MHz）

1000Ω±25%（@100MHz）

1000Ω±25%（@100MHz）

1000Ω±25%（@100MHz）

1000Ω±25%（@100MHz）

V

10K

33pF

470pF

AV

L-5

.5V

-100

PF

AV

L-5

.5V

-100P

F

AV

L-5

.5V

-100P

F

470pF

DNI-33pF

PE

SD

5V

0S

1B

L

耳机座

MIC2_P

CDC_HPH_RCDC_HPH_L

CDC_HS_DET

CDC_HPH_REF

FM_HEADSET

4700pF



8 Commissioning Interface

To facilitate software update and commissioning, reserve the FORCE_USB_BOOT interface.

The module can enter the fastboot mode by short connecting the FORCE_USB_BOOT pin and

VDEBUG_1P8V during the startup. This is the last method to troubleshoot the abnormality that the

module cannot start or operation properly.

Figure 8-1 Reference design of the fastboot interface

FORCE_USB_BOOTS1

VDEBUG_1P8V



9 Electric Feature and Reliability

9.1 Electric Feature

AM809 Electric Feature

Module Status Minimum Value Typical Value Maximum Value

VBAT

Vin 3.5V 3.9V 4.2V

Iin / / 4A

If the voltage is too low, the module might fail to start. If the voltage is too high or there is a voltage burst

during the startup, the module might be damaged permanently.

If you use LDO or DC-DC to supply power for the module, ensure that it output at least 2 A current.

9.2 Temperature

Temperature Feature

Module Status Minimum Value Typical Value Maximum Value

Work -25℃ 25℃ 75℃

Storage -45℃ 90℃

If the module works in temperature exceeding the thresholds, its RF performance (e.g. frequency

deviation or phase deviation) might be worse but it can still work properly.

9.3 ESD Protection

Electronics need to pass sever ESD tests. The following table shows the ESD capability of key pins of our

module. It is recommended that you add ESD protection to those pins in accordance to the application to

ensure your product quality when designing your products.



Humility: 45%Temperature: 25℃

AM809 ESD feature

Testing Point Contact Discharge Air Discharge

VBAT ±8KV ±15KV

GND ±8KV ±15KV

ANT ±8KV ±15KV

Cover ±8KV ±15KV

Others ±4KV ±8KV



10 RF feature

10.1 Work band

AM809 work band

Work band Uplink Downlink

GSM850 824~849MHz 869~894MHz

EGSM900 880~915MHz 925~960MHz

DCS1800 1710~1785MHz 1805~1880MHz

PCS1900 1850~1910MHz 1930~1990MHz

WCDMA2100 1920~1980MHz 2110~2170MHz

CDMA BC0 824~849MHz 869~894MHz

LTE-FDD B1 1920~1980MHz 2110~2170MHz

LTE-FDD B3 1710~1785MHz 1805~1880MHz

LTE-TDD B39 1880~1920MHz 1880~1920MHz

LTE-TDD B40 2300~2400MHz 2300~2400MHz

LTE-TDD B41 2496~2690 MHz 2496~2690 MHz

LTE-FDD B1 1920~1980MHz 2110~2170MHz

10.2 TX Power and RX Sensitivity

AM809 RF power and RX sensitivity

Band Transmitting Power Receiving Sensitivity

WCDMA2100 24dBm +1dBm/-3dBm <-107dBm

CDMA BC0 24dBm+1/-1dBm <-107dBm

GSM850

GMSK(1Tx Slot) 33 dBm+2/-2dBm <-107dBm

8PSK(1Tx Slot) 27 dBm+3/-3dBm <-107dBm

GSM900

GMSK(1Tx Slot) 33 dBm+2/-2dBm <-107dBm

8PSK(1Tx Slot) 27 dBm+3/-3dBm <-107dBm



GSM1800

GMSK(1Tx Slot) 30dBm+2/-2dBm <-107dBm

8PSK(1Tx Slot) 26dBm+3/-3dBm <-107dBm

GSM1900

GMSK(1Tx Slot) 30dBm+2/-2dBm <-107dBm

8PSK(1Tx Slot) 26dBm+3/-3dBm <-107dBm

LTE-FDD

B1

(10MHz)

23 dBm+2/-2dBm <-98dBm

LTE-FDD

B3

(10MHz)


LTE-TDD

B39

(10MHz)


LTE-TDD

B40

(10MHz)


LTE-TDD

B41

(10MHz)


The data in the above tables is obtained by connecting the module to RF test instrument (e.g.

CMU200, CWM500, or Agilent 8960) in lab tests. It is for reference only.



11 Mounting and Packaging

11.1 Mounting the Module onto the Application Board

AM809 is compatible with industrial standard reflow profile for lead-free SMT process.

The reflow profile is process dependent, so the following recommendation is just a start point guideline:

Only one flow is supported.

Quality of the solder joint depends on the solder volume. Minimum of 0.1 mm stencil thickness is

recommended.

Use bigger aperture size of the stencil than actual pad size.

Use a low-residue, no-clean type solder paste.

AM809 is big and use multi-layer HDI board so that it is difficult to solder. For information about

cautions in AM809 storage and mounting, refer to Neoway Module Reflow Manufacturing

Recommendations.

When you maintain and manually solder it, use heat guns with great opening, adjust the temperature to

250 degrees (depending on the type of the solder paste), and heat the module till the solder paste is melt.

The remove the module using tweezers. Do not shake the module in high temperature when you remove it.

Otherwise, the components inside the module might be misplaced.

11.2 Package

AM809 modules are packaged in sealed bags on delivery to guarantee a long shelf life. Package the

modules again in case of opening for any reasons.

If exposed in air for more than 48 hours at conditions not worse than 30°C/60% RH, a baking procedure

should be done before SMT. Or, if the indication card shows humidity greater than 20%, the baking

procedure is also required. Do not bake modules with the package tray directly.



12 Abbreviations

ADC Analog-Digital Converter

AFC Automatic Frequency Control

AGC Automatic Gain Control

AMR Acknowledged multirate (speech coder)

CSD Circuit Switched Data

CPU Central Processing Unit

DAI Digital Audio interface

DAC Digital-to-Analog Converter

DCE Data Communication Equipment

DSP Digital Signal Processor

DTE Data Terminal Equipment

DTMF Dual Tone Multi-Frequency

DTR Data Terminal Ready

EFR Enhanced Full Rate

EGSM Enhanced GSM

EMC Electromagnetic Compatibility

EMI Electro Magnetic Interference

ESD Electronic Static Discharge

ETS European Telecommunication Standard

FDMA Frequency Division Multiple Access

FR Full Rate

GPRS General Packet Radio Service

GSM Global Standard for Mobile

Communications

HR Half Rate

IC Integrated Circuit

IMEI International Mobile Equipment Identity



LCD Liquid Crystal Display

LED Light Emitting Diode

MS Mobile Station

PCB Printed Circuit Board

PCS Personal Communication System

RAM Random Access Memory

RF Radio Frequency

ROM Read-only Memory

RMS Root Mean Square

RTC Real Time Clock

SIM Subscriber Identification Module

SMS Short Message Service

SRAM Static Random Access Memory

TA Terminal adapter

TDMA Time Division Multiple Access

UART Universal asynchronous receiver-transmitter

USSD Unstructured Supplementary Service Data

VSWR Voltage Standing Wave Ratio

neo am809 smart module hardware user guide - wless.ru · figure 4-2 am809 lcd backlight chipset ......

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