design and development of mobile phone using modem, graphical lcd, buzzer and touchscreen based...
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8/3/2019 Design and Development of Mobile Phone Using Modem, Graphical Lcd, Buzzer and Touchscreen Based Keypad
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8/3/2019 Design and Development of Mobile Phone Using Modem, Graphical Lcd, Buzzer and Touchscreen Based Keypad
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CONTACT: 9491535690, 7842358459
www.svsembedded.com SVSEMBEDDED [email protected],
CONTACT: 9491535690, 7842358459
Description of various blocks in block diagram:
Power Supply Unit:
Power supply unit is used to provide a constant 5Volts, 1.5Amp supply to
different ICs. This is a standard circuit using external 12V DC adopter and fixed 3-pin
voltage regulator.
AVR Microcontroller:
The ATmega32 is a low-power CMOS 8-bit microcontroller based on the AVR
enhanced RISC architecture. By executing powerful instructions in a single clock cycle,
the ATmega32 achieves throughputs approaching 1 MIPS per MHz (max. 16MHz)
allowing the system designer to optimize power consumption versus processing speed,
Which provides features like 32K bytes of In-System Programmable Flash Program
memory with Read-While-Write capabilities, 1024 bytes EEPROM, 2K byte SRAM, 32general purpose I/O lines, 32 general purpose working registers, a JTAG interface for
Boundary-scan, On-chip Debugging support and programming, three flexible
Timer/Counters with compare modes, Internal and External Interrupts, a serial
programmable USART, a byte oriented Two-wire Serial Interface, an 8-channel, 10-bitADC with optional differential input stage with programmable gain, a programmable
Watchdog Timer with Internal Oscillator, an SPI serial port, and six software selectable
power saving modes.
LCD display unit(PCD8544)
Generation of LCD supply voltage (external supply The PCD8544 is a low power
CMOS LCD controller/driver, designed to drive a graphic display of 48 rows and84
columns. All necessary functions for the display are provided in a single chip, including
on-chip generation of LCD supply and bias voltages, resulting in a minimum of external
components and low power consumption.
Touch Screen:
A touch screen is a display that can detect the presence and location of a touchwithin the display area. The term generally refers to touch or contact to the display of the
device by a finger. Touch screens can also sense other passive objects, such as a stylus.
However, if the object sensed is active, as with a light pen, the term touch screen is
8/3/2019 Design and Development of Mobile Phone Using Modem, Graphical Lcd, Buzzer and Touchscreen Based Keypad
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www.svsembedded.com SVSEMBEDDED [email protected],
CONTACT: 9491535690, 7842358459
www.svsembedded.com SVSEMBEDDED [email protected],
CONTACT: 9491535690, 7842358459
generally not applicable. The ability to interact directly with a display typically indicates
the presence of a touch screen.
The touch screen has two main attributes. First, it enables one to interact with
what is displayed directly on the screen, where it is displayed, rather than indirectly with
a mouse or touchpad. Secondly, it lets one do so without requiring any intermediate
device, again, such as a stylus that needs to be held in the hand. Such displays can be
attached to computers or, as terminals, to networks. They also play a prominent role in
the design of digital appliances such as the personal digital assistant (PDA), satellite
navigation devices, mobile phones, and video games.
Block diagram:
8/3/2019 Design and Development of Mobile Phone Using Modem, Graphical Lcd, Buzzer and Touchscreen Based Keypad
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www.svsembedded.com SVSEMBEDDED [email protected],
CONTACT: 9491535690, 7842358459
www.svsembedded.com SVSEMBEDDED [email protected],
CONTACT: 9491535690, 7842358459
OUTPUT WINDOW: