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MikroElektronikaDevelopment tools - Books - Compilers

Software and Hardwaresolutions for Embedded World

With useful implemented peripherals, plentiful practical

code examples and a broad set of additional add-on

boards (Serial Ethernet, Compact Flash, MMC/SD,

ADC, DAC, CAN, RTC, RS-485, etc.), MikroElektronika

development boards make fast and reliable tools that

can satisfy the needs of experienced engineers and

beginners alike.

EasyPIC4User’s Manual

3 in1ICDm

ikro

IN-CIRCUITDEBUGGER

ICDmik

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IN-CIRCUITDEBUGGER

MICROCHIP

DEVELOPMENT

BOARD

MICROCHIP

DEVELOPMENT

BOARD

PICPIC

USB 2.0

IN-CIRCUITPROGRAMMER

USB 2.0


M I K R O E L E K T R O N I K A S O F T W A R E A N D H A R D W A R E S O L U T I O N S F O R T H E E M B E D D E D W O R L D 22page

EasyPIC

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EasyPIC4 User’s ManualMikroElektronikaDevelopment tools

No part of this manual, including the product and software described in it, may be repro-

duced, transmitted, transcribed, stored in a retrieval system, or translated into any language

in any form or by any means, except documentation kept buy the purchaser for backup pur-

poses, without the express written permission of MikroElektronika company.

Product warranty or service will not be extended if the product is repaired, modified or

altered, unless such repair, modification or alteration is authorized in writing by

MikroElektronika.

MIKROELEKTRONIKA PROVIDE THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY

KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED

WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTIC-

ULAR PUROSE.

IN NO EVENT SHALL MIKROELEKTRONIKA, ITS DIRECTORS, OFFICERS, EMPLOY-

EES OR DISTRIBUTORS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR

CONSEQUENTIAL DAMAGES(INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS

OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE

LIKE) EVEN IF MIKROELEKTRONIKA HAS BEEN ADVISED OF THE POSSIBILITY OF

SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR

PRODUCT.

SPECIFICATION AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED

FOR INTERNATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITH-

OUT NOTICE, AND SHOULD BE CONSTRUED AS A COMMITMENT BY

MIKROELEKTRONIKA

MikroElektronika assumes no responsibility or liability for any errors or inaccuracies that

may appear in this manual, including the product and software described in it.

Product and corporate names appearing in this manual may or may not be registered trade-

marks or copyrights of their respective companies, and are used only for identification or

explanation and to the owners benefit, without intent to infringe.

Second edition

January 2007


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CONNECTING THE SYSTEM page 4

INTRODUCTION page 5

CONTENTS

DESCRIPTION OF THE DEVELOPMENT SYSTEM page 5

Power Supply page 10

On-board USB 2.0 programmer page 11

Jumpers page 7

MCU sockets page 8

LEDs page 16

Pushbutton switches page 18

PS/2 keyboard page 28

7-segment displays page 21

Graphic LCD page 22

LCD 2x16 in 4-bit mode page 23

LCD 2x16 in 8-bit mode page 24

A/D Converter input page 30

USB Communication page 27

Direct Port Access page 32

RS-232 Communication page 26

DS1820 Digital Thermometer page 29

mikroICD (In-Circuit Debugger) page 15

Oscillator page 13

Switches page 6

M I K R O E L E K T R O N I K A S O F T W A R E A N D H A R D W A R E S O L U T I O N S F O R T H E E M B E D D E D W O R L D EasyPIC

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EasyPIC4 User’s Manual MikroElektronikaDevelopment tools

44page

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The development system box contains the development system, product CD, USB cable,

RS232 cable and this manual.

The first thing to do is to take the system out of the box. Unpack the USB cable and con-

nect it to the PC. Please use USB ports on the back of the PC with direct connection to the

motherboard.

Install the PICFLASH2 programmer and drivers. Start the installation from the product CD:

CD_Drive:\product\zip\PICFlash_setup.exe.

After the installation connect the USB cable to the EasyPIC4 board. You will be asked for

the PICprog drivers. Point to them in order to finish the driver instalation. They are placed

in the folder:

System_Drive:\Program Files\Mikroelektronika\PICFLASH-mikroICD\Driver.NT

Run and use PICFLASH2 as explained in the document ‘PICflash2 programmer’.

CD_Drive:\product\pdf\picflash_manual_v4.pdf

After these 4 steps, your EasyPIC4 is installed and ready for use. You should try to read a

program from the chip or to load an example from the examples folder of mikroElektroni-

ka’s compilers for PIC or from the product CD:

CD_Drive:\product\zip\easypic4_examples.zip.

CONNECTING THE SYSTEM

Step no.1

Step no.2

Step no.3

Step no.4


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The EasyPIC4 development system is a full-featured development board for Microchip PIC

microcontrollers. It has been designed to allow students and engineers to easily exercise and

explore the capabilities of PIC microcontrollers. It allows PIC microcontrollers to be inter-

faced with external circuits and a broad range of peripheral devices, allowing a user to con-

centrate on software development.

Figure 1 illustrates the development board. Each component is marked on a silkscreen, both

top and bottom. These marks describe connections to the microcontroller, operation modes,

and provide some useful notes. The need for additional schematics is minimized since all

relevant information is printed on the board.

INTRODUCTION

Figure 1. EasyPIC4 development board

MICROCHIP

DEVELOPMENT

BOARD

MICROCHIP

DEVELOPMENT

BOARD

PICPIC


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SWITCHES

The EasyPIC4 development board features a number of peripherial devices. In order to

enable these devices before programming, you need to check if appropriate jumpers or

switches have been properly set.

Switches are devices that have two positions - ON and OFF, which have a role to establish

or break a connection between two contacts. The EasyPIC4 development board has two

groups of switches.

The first group, SW1, enables connections between the microcontroller port with analog

capabilities (PORTA) and external pull-up/down resistors. The pull-up/down resistors

should be disconnected from the analog input pins, otherwise they will affect the input volt-

age level. When PORTA pins are used as digital inputs/outputs, the appropriate pull-

up/down resistors should be enabled.

The upper four switches of SW2 are used to enable LEDs connected to PORTA/E, PORTB,

PORTC and PORTD. For example, if the switch for PORTB is OFF, all PORTB LEDs will

be turned off.

The lower four switches of SW2 are used to enable the 7-segment displays. If you don’t

need the 7-segment displays in your project, these switches should be OFF.

Switch is ON

Switch is OFF

1 ON

43

25

87

6

Figure 2.

Group of 8 switches

Switch 1 is ON, and other

switches are OFF


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Jumpers, like switches, can break or establish a connection between two points. Beneath the

plastic cover of the jumper is a metal contact, which makes a connection if the jumper is

placed between two disconnected pins.

For example, the jumper group JP10 have two jumpers used as switches. They are used to

connect or disconnect PS/2 CLK pin to RC1 and PS/2 DATA pin to RC0 pin of the micro-

controller. A connection is made when the jumpers are placed between two contacts.

More often jumpers are used as a selector between two possible connections by using a three

pin connector. As illustrated in Fig. 4, the middle contact can be connected to the left or right

pin, depending on the jumper’s position.

Left lineis selected

All lines aredisconnected

Right lineis selected

Jumper is ON

Jumper is OFF

Figure 3.

Figure 4.

Jumper as a switch

Jumper as a

multiplexer

JUMPERS


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EasyPIC4 is delivered with a 40-pin microcontroller. Users can remove this one and fit a dif-

ferent microcontroller in DIP40, DIP28, DIP20, DIP18, DIP14 or DIP8 packages of an ade-

quate pinout.

MCU SOCKETS

Note: Since all packages have parallel connections, there must not be more than one micro-

controller on the board at a time.

Figure 5. MCU sockets

Note: Make sure to place jumper JP18 in lower position (labeled as VCC) while using

PIC18F2331 microcontroller. When using some other 28-pin MCU this jumper must be at

upper position (labeled as RA5).

Note: There are two DIP18 sockets, with different pinouts (DIP18A and DIP18B). When

putting 18-pin microcontoller into DIP18 socket choose the one with corresponding pinout.

For example, PIC18F1220 uses DIP18A socket, while PIC16F628A uses DIP18B socket.

The 10F MCU socket is used only for PIC10F family and the DIP8 socket is used for all

other 8-pin microcontrollers.


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DIP

40

RA0

RA1

RA2

RA3

RA4

RA5

RE0

RE1

RE2

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

VDD

VSS

MCLR

VDD

VSS

RA4

RA4RA4

RA4

PortA

DIP28

vcc

vcc

vcc

RA4 RA4GP4

(RA4)

DIP18 DIP14

DIP8

1

1

ON

ON

8

87 7

6

6

5

5

4

4

3

3

2

2

PORTA/EPORTA/GP

RA4

JP17

SW2

SW

1

Microcontroller’s pins are routed to various peripherals as illustrated in Fig. 6. All ports have

direct connections to Direct Port Access connectors. Such connectors are typically used for

connecting external peripherals to the board or for providing useful points for connecting

digital logic probe.

All ports are connected to LEDs, push-button switches and pull-up/down resistors, which

allow easy monitoring and testing of digital pin state .

Some pins are connected to other peripherials such as the DS1820 temperature sensor, RS-

232 communication, 7-segment displays, LCD, etc.

System connectionFigure 6.


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As a power supply source, users can select either a regulated supply from the USB cable

(default) or an external power supply. In case of the USB power supply, the system should

be connected to a PC using the USB programming cable, while the jumper JP1 should be

set in the right-hand position.

In the case of an external power supply, the EasyPIC4 board produces +5V using an

LM7805 voltage regulator. The external power supply can be AC or DC, with a voltage

between 8V and 16V and the jumper JP1 should be set in the left-hand position. In Fig. 7

you can see USB and external power supply connectors.

GND

Vin Vout

VCC

CN1 8-12V (AC/DC)

+

E1470uF

C8100nF

E2470uF

C15100nF

1

2

VCC

D-

D+

GND

5V 5V

USB

FP1

1

2

3

USB yPower Suppl

External Power Supply

EXT

EXT

USB

USB

REG17805

E3470uF

JP1

POWER SUPPLY

JP1 in the left-hand

position: system will

take power from the

external AC/DC

power adapter.

JP1 in the right-hand

position: system will

take power from the

USB cable.

USB and power supply connectorsFigure 7.

Figure 8. Power supply select jumper

Figure 9. JP1 is set to USB power supply

EXT USB

USB

connector

USB

connector

External power

supply connector

POWER SUPPLY

SELECTABLE

POWER SUPPLY

SELECTABLE


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EERRON-BOARD USB 2.0 PROGRAMMER

Figure 10.

Figure 11.

USB 2.0 programmer

JP5 jumpers explanation

There is no need for the use of external

equipment during programming as

EasyPIC4 development system has its

own on-board USB programmer. All

you need to do is connect the system to

a PC using USB cable. Then, load your

program into the microcontroller via

the PICFlash2 programming software

which is supplied with EasyPIC4.

On the right of the USB programmer there is the JP5 jumpers group. These jumpers are used

for PGM pin selection. There are two different programming modes for PIC MCUs: Low-

Voltage and High-Voltage programming mode. PICflash2 supports only High-Voltage pro-

gramming mode which can be applied regardless of MCU’s programming state. Since some

PIC MCUs are being shipped whith Low-Voltage programming mode as default, you must

select a proper PGM pin (depending on chip). For most of the MCUs you don’t have to use

PGM selection and the JP5 jumpers group should stay in the Default position.

Default position

RB5 used as PGM RB4 used as PGM

RB3 used as PGM

Note: There is no need for reseting MCU after programming. The programmer will reset the

MCU automatically.

USB 2.0


USB 2.0



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Figure 14.

JP2 jumperexplanation

Jumper JP2 allows using the MCLR pin as RESET or as digital I/O. It can be RE3, RA5 or

RA3 pin depending on MCU that you are using.

When JP2 is in the lower position the hardware reset (pressing reset button) is enabled and

MCLR pin can not be used as an I/O pin.

When JP2 is in the upper position the MCLR pin can be used as an I/O pin but the hardware

reset is disabled.

MCLR pinused as I/O

MCLR pinused as RESET

When using DIP40, DIP28, DIP18A and DIP18B sockets, jumpers JP3 and JP4 should be

in the upper position (default) as shown in Fig. 12.

For DIP20, DIP14 and DIP8 sockets, these jumpers should be in the lower position

(Fig. 13).

Figure 12.

Figure 13.

JP3 and JP4 for DIP40,DIP28, DIP18A and DIP18B

JP3 and JP4 for DIP20,DIP14 and DIP8


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Since there are so many sockets on EasyPIC4 board, there are two oscillators that are con-

nected with two main sections of the MCU sockets. The first oscillator is labeled as OSC1

and is connected to DIP40, DIP28, DIP18A and DIP18B socket. The second oscillator is

labeled as OSC2 and is connected to DIP20, DIP14 and DIP8 socket.

Figure 15.Oscillators

Note: As you can see from the picture above, 10F MCU socket is not connected to any of

the two oscillators. This MCUs have only an internal oscillator and they can’t be used with

an external crystal.

For some microcontrollers oscillator input pins can also be used as digital input/output pins.

In order to implement this feature EasyPIC4 has jumpers for connecting MCU either to

oscillator or to digital I/O pins. You can see the schematics for OSC1 oscillator on Fig. 16.


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RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

RA7/OSC1

RA6/OSC2

MCLR

VDD

VSS

vcc

X18MHz

C622pF

C722pF

RA7 RA6

JP13

RA6 and RA7 pins areused as oscillator input

RA6 and RA7 pins areused as digital I/O

Figure 16.

Oscillator connection with MCU

Note: If the used DIP’s oscillator pins are labeled with OSC1 then the oscillator should be

placed in the OSC1 connector. If the used DIP’s oscillator pins are labeled with OSC2 then

the oscillator should be placed in the OSC2 connector.


EasyPIC

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))mikroICD (Real-Time Hardware In-Circuit Debugger)

mikroICD is highly effective tool for Real-Time debugging on hardware level. mikroICD

debugger enables you to execute a program on a PIC microcontroller and view variable val-

ues, Special Function Registers (SFR) and EEPROM as the program is running.

Start Debugger [F9]

Run/ Pause Debugger [F6]

Toggle Breakpoints [F5]

Run to cursor [F4]

Step Into [F7]

Step Over [F8]

Flush RAM [F2]

Stop Debugger [Ctrl+F2]

Figure 17. On-Board USB programmerwith mikroICD

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You can use mikroICD within any of MikroElektronika’s compilers for PIC (mikroC,

mikroBasic or mikroPascal). All you have to do is to select appropriate build type (Release

or ICD Debug), build the project, program the MCU, select appropriate debugger

(mikroICD Debugger) and you are ready to go.

Note: For more information on how to use mikroICD debugger please refer to the mikroICD

documentation: “mikroICD User’s Manual”. You can also find it within the Help documen-

tation inside any of the mentioned compilers.

mikroICD debugger uses on-board programmer to communicate with the compiler and it

supports common debugger commands:


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LLEEDD

ss

Light Emitting Diodes (LEDs) are the most commonly used components, usually for dis-

playing pin’s digital state. EasyPIC4 has 36 LEDs that are connected to the microcontroller’s

PORTA, PORTB, PORTC, PORTD and PORTE.

LEDs

Figure 18. Light Emitting Diodes

Each group of eight LEDs can be enabled or disabled using the switch SW2. The exception

is PORTE which has 4 LEDs and is connected to the same switch as PORTA.

Fig. 19. illustrates the connection of a LEDs to PORTB of the microcontroller. A resistor is

used in series with the LED to limit the LED's current. In this case the resistor's value is 1K.


EasyPIC

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LLEEDD

ssThe LEDs are enabled when the corresponding switch on SW2 is on. When enabled, LEDs

will display the state of the corresponding microcontroller pin; otherwise the LEDs will

always be off, no matter what the port state is, as no current can flow through LED.

RN7

R-SIL 8/9

1

2

3

4

5

6

7

89

RB0

RB1

RB2

RB3

RB4

RB5

RB6

RB7

1 ON

43

25

87

6

PORTD LED

PORTC LED

PORTB LED

PORTA/E LED

VCC

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

CURRENT FLOW

X18MHz

C622pF

C722pF

Figure 19.LED schematic


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PICflashOn-Board USBprogrammer

R1

71

0K

Res

et

VCC

C1

41

00

n

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

VCC

X18MHz

C622pF

C722pF

EasyPIC4 has 36 push buttons, which can be used to

change states of digital inputs to microcontroller's

ports. There is also one switch that acts as a RESET.

Reset switch schematic is shown in Figure 21.

PUSHBUTTON SWITCHES

Figure 22.

Pushbutton switches

Figure 20.Reset switch

Figure 21.

Reset switch schematic


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VCC

RA0

RA1

RA2

RA3

RA4

RA5

RA6

RA7

RB0

RB1

RB2

RB3

RB4

RB5

RB6

RB7

RC0

RC1

RC2

RC3

RC4

RC5

RC6

RC7

RD0 RE0

RD1 RE1

RD2 RE2

RD3 RE3

RD4

RD5

RD6

RD7

PORTA PORTB PORTC PORTD PORTE

VCC

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

0V while buttonis pressed

+5V while buttonis pressed

X18MHz

C622pF

C722pF

JP17Figure 23.

Buttons schematic

Buttons connections to PORTA, PORTB, PORTC, PORTD and PORTE are shown in Fig.

23. Jumper JP17 determines whether a button press will bring logical zero or logical one to

the appropriate pin.

When button is not pressed, pin state is determined by the pull-up or pull-down port

jumpers.

In the example shown in Fig. 23, JP17 is connected to +5V, therefore pressing the buttons

will bring logical one to the appropriate pins.


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EESS On Fig. 24 the JP21 switch is

set to pull-up, therefore when

the button is not pressed,

pull-up resistor pulls the

microcontroller’s RB4 pin to

+5V.

A button press causes the

port pin to be connected to

ground (JP17 is in the lower

position).

Thus, only when the button is

pressed the microcontroller

will sense a logical zero; oth-

erwise the pin state will

always be logical one.

On Fig. 25 the JP21 switch is

set to pull-down, therefore

when the button is not

pressed, pull-down resistor

pulls the microcontroller’s

RB4 pin to 0V.

A button press causes the

port pin to be connected to

+5V (JP17 is in the higher

position).

Thus, only when the button is

pressed the microcontroller

will sense a logical one; oth-

erwise the pin state will

always be logical zero.

RB4

PortBpull-up

0V while pressed

vcc

DIP

40

RA0

RA1

RA2

RA3

RA4

RA5

RE0

RE1

RE2

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

VDD

VSS

MCLR

VDD

VSS

vcc

JP21

JP17

RB4

PortBpull-down

5V while pressed

vcc

DIP

40

RA0

RA1

RA2

RA3

RA4

RA5

RE0

RE1

RE2

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

VDD

VSS

MCLR

VDD

VSS

vcc

JP21

JP17

Figure 24.

Figure 25.

Button with pull-up resistor

Button with pull-down resistor


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7-SEGMENT DISPLAYS

EasyPIC4 has four 7-segment displays in multiplex mode. Data lines are connected to

PORTD, while each display is enabled through the lower four bits of PORTA.

dp

R10

10K

Q1

d

e

f

a

g

dp

c

b

Q4Q3Q2

10K 10K 10K

R11 R12 R13

VCC

8.8.

a

b

c

d

e

f

g

PORTA/E LEDs ON

PORTB LEDs ON

PORTC LEDs ON

PORTD LEDs ON

DIS3

DIS3 DIS2 DIS1 DIS0

RA3

DIS2RA2

DIS1RA1

DIS0RA0

1 ON

87

65

43

2

SW2

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS R9 - R2

8.8.

1 2 3 4 5

10 9 8 7 6

8.8.

1 2 3 4 5

10 9 8 7 6

8.8.

1 2 3 4 5

10 9 8 7 6

8.8.

1 2 3 4 5

10 9 8 7 6

X18MHz

C622pF

C722pF

Figure 26.

7-segment displays

Figure 27.7-segment displays schematic

8.8.8.8.

7

S

E

G

7

S

E

G

READY

READY


ICD

4


2222page

GGRR

AAPP

HHIICC

LLCC

DD 11

2288XX

6644

In order to enable GLCD,

jumper JP12 should be set

to the right-hand position,

labeled as GRAPH.

GRAPHIC LCD

A graphic LCD (GLCD) allows advanced visual messages to be displayed. While a charac-

ter LCD can display only alphanumeric characters, a GLCD can be used to display mes-

sages in the form of drawings and bitmaps. The most commonly used graphic LCD has the

screen resolution of 128x64 pixels. Before a GLCD is connected, the user needs to set the

jumper JP12 (Fig. 28) to the right-hand position. The GLCD’s contrast can be adjusted

using the potentiometer P3, which is placed to the right of the GLCD.

P3 10K

Vee

VoContrastAdjustment

JP12

GRAPH.CHAR.

D0

D1 D2

D3

D4

D5

D6

D7

CS1

CS2

RS

R/W

E

RST

VCC

VCC

VCC

D5

D4

D3

D2

D1

D0E

R/WR

S

LE

D-

Vo

LE

D+

VC

C

Vee

GN

D

RS

T

CS

2

D7

CS

1

D6

1 20

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

LCD8 contrastselected

GLCD and LCD8contrast not selected

GLCD contrastselected

X18MHz

C622pF

C722pF

R28 2E2

VCC

RD

5R

D4

RD

3

RD

2

RD

1

RD

0R

B4

RB

3

RB

2

RB

5

RB

1

RD

7

RB

0

RD

6

Figure 30.

GLCD schematic

Figure 28.

Figure 29.

GLCDselectionjumper

GLCD

GRAPHIC LCD

CONNECTOR

ON-BOARD

GRAPHIC LCD

CONNECTOR

ON-BOARD


EasyPIC

ICD

4


LLCCDD

22XX

1166 II

NN 44

--BBIITT

MMOO

DDEE

A standard character LCD is probably the most widely used data visualization component.

Usually, it can display two lines of 16 alphanumeric characters, each made up of 5x8 pix-

els. The character LCD communicates with the microcontroller via a 4-bit or 8-bit data bus,

each requiring the use of a different connector on EasyPIC4. For 4-bit data bus use, the LCD

should be placed in the upper left of the board, just above the LEDs. The connection to the

microcontroller is shown in Fig. 32 where there are only four data lines. It is important to

note that the LCD should be placed or removed from EasyPIC4 only when the power is off.

LCD 2X16 IN 4-BIT MODE

D7

D6

D5

D4

D3

D2

D1

D0E

R/WR

S

VE

E

VC

C

GN

D

P410K

ContrastAdjustment

VCC

1 14

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

VCC

X18MHz

C622pF

C722pF

LCD Display

4-bit mode

RD

7

RD

6

RD

5

RD

4

GN

D

GN

DG

ND

GN

D

RD

3

GN

D

RD

2

Figure 31.

Figure 32.

LCD 2x16 in 4-bit mode

LCD 2x16 in 4-bitmode schematic

2x16 LCD2x16 LCD

2x16 LCDCONNECTOR2x16 LCDCONNECTOR

ON-BOARDON-BOARD


ICD

4


2244page

LLCCDD

22XX

1166 II

NN 88

--BBIITT

MMOO

DDEE

The LCD must be placed in the marked position with two free pins to the left and four free

pins to the right. It is important to note that the LCD should be placed or removed from

EasyPIC4 only when the power is off. Before attaching the LCD, set jumper JP12 to the left

position. The LCD's contrast can be adjusted using potentiometer P3 which is located to the

right of the GLCD/LCD connector.

LCD 2X16 IN 8-BIT MODE

When using a character LCD in 8-bit mode, the connector that is shared with the GLCD

should be used. Since this connector has 20 pins and the character LCD has only 14 pins,

special attention is required when placing the LCD. Otherwise the LCD can be permanent-

ly damaged.

Figure 33.

LCD 2x16 in 8-bit mode

NOTE: Special attention is required when placing the LCD. Otherwise the LCD can be per-

manently damaged.

View from the back:shows which pinsstays disconnected.

2x16 LCD2x16 LCD

2x16 LCDCONNECTOR2x16 LCDCONNECTOR

ON-BOARDON-BOARD


EasyPIC

ICD

4


LLCCDD

22XX

1166 II

NN 88

--BBIITT

MMOO

DDEE

P3 10K

Vee

VoContrastAdjustment

JP12

GRAPH.CHAR.

D0

D1 D2

D3

D4

D5

D6

D7

RS

R/W

E

VCC

VCC

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

LCD8 contrastselected

GLCD and LCD8contrast not selected

GLCD contrastselected

X18MHz

C622pF

C722pF

VCC

D7

D6

D5

D4

D3

D2

D1

D0E

R/WR

S

VE

E

VC

C

GN

D

1 14

LCD Display

8-bit mode

RD

7R

D6

RD

5

RD

4

RD

3

RD

2R

D1

RD

0

RB

4

RB

3

RB

2

Figure 34. LCD 8-bit mode schematic

Leave two freepins to the left side

Leave four free pinsto the right side

In order to enable LCD,

jumper JP12 should be set

to the left position, labeled

as CHAR.


ICD

4


2266page

RRSS

--223322

CCOO

MMMM

UUNN

IICCAA

TTIIOO

NN

RS-232 communication enables point-to-point data transfer. It is commonly used in data

acquisition applications for the transfer of data between microcontroller and a PC. Since

the voltage levels of a microcontroller and PC are not directly compatible with those of

RS-232, a level transition buffer, such as the MAX232, must be used. In order to provide

a more flexible system, the microcontroller is connected to the MAX232 through the two

jumper groups: JP7 and JP8. The jumper group JP7 is

used to connect the Rx line to RC7, RB2 or RB1. The

jumper group JP8 is used to connect the Tx line to RC6,

RB5 or RB2. Note that JP7 and JP8 must not be con-

nected to RB2 at the same time. JP6 enables the con-

nections of RB0 pin to CTS and RC2 pin to RTS line

for implementing hardware handshaking.

RS-232 COMMUNICATION

VCC

VCC

1

1

6

6

9

9

5

5

C1+ VCC

V+ GND

C1- T1out

C2+ R1in

C2- R1out

V- T1in

T2out T2in

R2in R2out

MAX232

Serial Cable

Rx

Tx

Tx

Rx

RC6

RB5

RB2

RC2RTS

RB2

RC7

RB1

RB0CTS

E910uF

E810uF

E1010uF

E1110uF

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

X18MHz

C622pF

C722pF

RTS

CTS

JP8

JP7

JP6

Figure 35.

Figure 36.

Connection betweenmicrocontroller

and a PC

RS232 connector


EasyPIC

ICD

4


UUSS

BB CC

OOMM

MMUU

NNIICC

AATT

IIOONN

The USB communication connector is placed in the upper right corner of the EasyPIC4. It

is used with specific PIC microcontrollers that have USB support, such as PIC18F2450 or

PIC18F4550. Note that the USB communication connector cannot be used for programming

and that the USB programming connector cannot be

used for communication. In order to enable connection

between the microcontroller and USB communication

connector, the JP9 jumpers group should be set to the

right position. As the result, microcontroller pins

RC3, RC4 and RC5 are disconnected from the rest of

the system and connected to the USB communication

connector.

USB COMMUNICATION

RC4-U

RC4

RC5-U

RC5

RC3-U

100n100n

RC3

VCC

JP9 JP9

RC3-U, RC4-U, RC5-U areavailable to other peripherials

RC3-U, RC4-U , RC5-U areconnected onl to USBy

VCC

VCC

D+ D-

USB

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

X18MHz

C622pF

C722pF

JP9

Figure 37.

Figure 38.

USB communica-tion schematic

USB communicationconnector

To enable USB

communication all

three jumpers have

to be set to the right

side.


ICD

4


2288page

PPSS

//22 CC

OOMM

MMUU

NNIICC

AATT

IIOONN

The PS/2 connector allows direct connection

between EasyPIC4 and devices that use PS/2

communication, such as PC, keyboard or

mouse. For example, the microcontroller can

be connected to a keyboard to capture pressed

keys or it can be connected to a PC to act as a

keyboard. CLK and DATA lines are used for

data tansfer. In this case, they are connected

to pins RC1 and RC0 respectively.

PS/2 COMMUNICATION

+5V

DATANC

NC CLK

VCC

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

X18MHz

C622pF

C722pF

R3710K

DATANCGNDVCCCLKNC

PS2CONNECTOR

VCC

R3810K

JP10

VCC VCC

Figure 41.

Figure 39.

PS/2 connector

PS/2 communication schematic

Figure 40.

Keyboard connected todevelopment board

PS/2 READY

DEVELOPMENTDEVELOPMENT

PS/2 READY


EasyPIC

ICD

4


DDSS

11882200

DDIIGG

IITTAA

LL TT

HHEE

RRMM

OOMM

EETT

EERR

DS1820 digital thermometer is well suited to

environmental temperature measurement,

having the temperature range of -55°C to

125°C and the accuracy of +/-0.5°C. It must

be placed correctly in the 3-pin socket provid-

ed on EasyPIC4, with its rounded side to the

right, as marked on the board (see Fig. 42)

otherwise the DS1820 could be permanently

damaged. DS1820’s data pin can be connect-

ed to either RA5 or RE2 pin, which is deter-

mined by jumper JP11.

JP11

DS1820

VCC

R110K

GND

DQ

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

DQ line isconnected to RE2

DQ line isconnected to RA5

DQ line isconnecteddis

-55 C

125 C

VCC

X18MHz

C622pF

C722pF

VCC

VCC

There is a mark inthe form of half-cir-cle for proper ori-entation of DS1820sensor.

DS1820 DIGITAL THERMOMETER

Figure 42.

Figure 43.

DS1820

DS1820 Schematic


ICD

4


3300page

AANN

AALLOO

GG TT

OO DD

IIGGIITT

AALL

CCOO

NNVV

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TTEE

RR II

NNPP

UUTT

A/D CONVERTER INPUT

Figure 44.

A-D Converter input

EasyPIC4 development board has two potentiometers for working with Analog to Digital

Converter (ADC). Both potentiometers outputs are in the range of 0V to 5V. Two analog sig-

nals can be connected on two different analog input pins at the same time. The jumpers

group JP15 enables connection between potentiometer P1 and one of the following pins:

RA0, RA1, RA2, RA3 or RA4. The jumpers group JP16 enables connection between poten-

tiometer P2 and one of the following pins: RA1, RA2, RA3, RA4 or RA5.

In order to measure analog signal without interference, turn the coresponding switch on

SW1 to OFF position. This will disable connection of the used PORTA pin to the pull-

up/down resistors.

Applications of A-D Conversion are various. Microcontroller takes analog signal from its

input pin and translates it into a digital value. Basically, you can measure any analog signal

that fits in range acceptable by PIC. That range is 0V to 5V.

ADC INPUT

ENABLED

ADC INPUT

ENABLED


EasyPIC

ICD

4


AANN

AALLOO

GG TT

OO DD

IIGGIITT

AALL

CCOO

NNVV

EERR

TTEE

RR II

NNPP

UUTT

vcc vcc

P110K

P210K

0 - 5V

0 - 5V 0 - 5V

JP15 JP16

PortA

vcc

pull-up/down

1

ON

8765432

SW

1

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

RA

0

RA

1

RA

2

RA

3

RA

4

RA

5

vcc

X18MHz

C622pF

C722pF

Figure 45.

A-D Converter inputschematic Pull-up/down resistors on

PORTA analog input pins

should be disabled using

SW1

NOTE: Jumpers JP15 and JP16 should not select the same pin.

Potentiometer P1 is con-

nected to RA2 pin and

potentiometer P2 is con-

nected to RA3 pin.


ICD

4


3322page

DDIIRR

EECC

TT PP

OORR

TT AA

CCCC

EESS

SS

These connectors can be used for system expansion with external boards such as Serial

Ethernet, Compact Flash, MMC/SD, ADC, DAC, CAN, RTC, RS-485, etc. Ensure that the

on-board peripherals are disconnected from microcontroller by setting the appropriate

jumpers, while external peripherals are using the same pins. The connectors can also be used

for attaching logic probes or other test equipment.

All microcontroller input/output pins can be accessed via connectors placed along the right

side of the board. For each of PORTA, PORTB, PORTC, PORTD and PORTE there is one

10-pin connector providing VCC, GND and up to eight port pins.

DIRECT PORT ACCESS

Figure 46.Direct port access connectors

Figure 47.

Example of how to connectexternal peripheral with flatcable


EasyPIC

ICD

4


DDIIRR

EECC

TT PP

OORR

TT AA

CCCC

EESS

SS

RB4

RB6

RB0

RB2

RB5

RB7

RB1

RB3

HEADER 5x2

CN9

RB6

RB7

RB4

RB5

RB2

RB3

RB0

RB1

8

9

6

7

4

5

2

3

1

2

3

1JP21

Pull-up line isconnected

All linesare disconnected

Pull-down lineis connected

RN2

RPACK8/98x10K

VCC

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

VCC

VCC

X18MHz

C622pF

C722pF

Figure 48.

PORTB connection


ICD

4


3344page

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of our products or you just want additional

information, please let us know. We are

committed to meeting your every need.

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