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ATMEGA603 Datasheet(PDF) 2 Page - ATMEL Corporation

Part No. ATMEGA603
Description  8-Bit Microcontroller with 64K/128K Bytes In-System Programmable Flash
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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 2 page
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ATmega603(L) and ATmega103(L)
2
Block Diagram
Figure 1. The ATmega603/103 Block Diagram
Description
The ATmega603/103 is a low-power CMOS 8-bit microcon-
troller based on the
AVR enhanced RISC architecture. By
executing powerful instructions in a single clock cycle, the
ATmega603/103 achieves throughputs approaching 1
MIPS per MHz allowing the system designer to optimize
power consumption versus processing speed.
The AVR core is based on an enhanced RISC architecture
that combines a rich instruction set with 32 general purpose
working registers. All the 32 registers are directly con-
nected to the Arithmetic Logic Unit (ALU), allowing two
independent registers to be accessed in one single instruc-
tion executed in one clock cycle. The resulting architecture
is more code efficient while achieving throughputs up to ten
times faster than conventional CISC microcontrollers.
The ATmega603/103 provides the following features:
64K/128K bytes of In-system Programmable Flash, 2K/4K
bytes EEPROM, 4K bytes SRAM, 32 general purpose I/O
lines, 8 Input lines, 8 Output lines, 32 general purpose
working registers, 4 flexible timer/counters with compare
modes and PWM, UART, programmable Watchdog Timer
with internal oscillator, an SPI serial port and three software
selectable power saving modes. The Idle Mode stops the
CPU while allowing the SRAM, timer/counters, SPI port
and interrupt system to continue functioning. The Power
PROGRAM
COUNTER
INTERNAL
OSCILLATOR
WATCHDOG
TIMER
STACK
POINTER
PROGRAM
FLASH
MCU CONTROL
REGISTER
SRAM
GENERAL
PURPOSE
REGISTERS
INSTRUCTION
REGISTER
TIMER/
COUNTERS
INSTRUCTION
DECODER
DATA DIR.
REG. PORTB
DATA DIR.
REG. PORTE
DATA DIR.
REG. PORTA
DATA DIR.
REG. PORTD
DATA REGISTER
PORTB
DATA REGISTER
PORTE
DATA REGISTER
PORTA
DATA REGISTER
PORTC
DATA REGISTER
PORTD
PROGRAMMING
LOGIC
TIMING AND
CONTROL
OSCILLATOR
OSCILLATOR
INTERRUPT
UNIT
EEPROM
SPI
UART
STATUS
REGISTER
Z
Y
X
ALU
PORTB DRIVER/BUFFERS
PORTE DRIVER/BUFFERS
PORTA DRIVER/BUFFERS
PORTF BUFFERS
ANALOG MUX
ADC
PORTD DRIVER/BUFFERS
PORTC DRIVERS
PB0 - PB7
PE0 - PE7
PA0 - PA7
PF0 - PF7
RESET
VCC
VCC
AGND
GND
GND
AREF
TOSC2
TOSC1
XTAL1
XTAL1
CONTROL
LINES
PD0 - PD7
PC0 - PC7
PEN
ALE
WR
RD
8-BIT DATA BUS
AVCC




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