atmega603 ATMEL Corporation, atmega603 Datasheet - Page 2

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atmega603

Manufacturer Part Number
atmega603
Description
8-bit Microcontroller With 64k/128k Bytes In-system Programmable Flash - Atmel Corporation
Manufacturer
ATMEL Corporation
Datasheet
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
2
AGND
AVCC
AREF
GND
VCC
ATmega603(L) and ATmega103(L)
DATA REGISTER
ANALOG MUX
PORTE
PORTE DRIVER/BUFFERS
PORTF BUFFERS
PF0 - PF7
PE0 - PE7
INSTRUCTION
INSTRUCTION
PROGRAM
PROGRAM
COUNTER
REGISTER
CONTROL
DECODER
FLASH
LINES
REG. PORTE
DATA DIR.
ADC
REGISTERS
PURPOSE
REGISTER
GENERAL
POINTER
STATUS
STACK
SRAM
DATA REGISTER
DATA REGISTER
ALU
SPI
X
Y
Z
PORTB
PORTA
PORTA DRIVER/BUFFERS
PORTB DRIVER/BUFFERS
PB0 - PB7
PA0 - PA7
REG. PORTA
REG. PORTB
DATA DIR.
DATA DIR.
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
PROGRAMMING
MCU CONTROL
OSCILLATOR
WATCHDOG
COUNTERS
INTERRUPT
REGISTER
INTERNAL
EEPROM
TIMER/
TIMER
LOGIC
UART
UNIT
8-BIT DATA BUS
DATA REGISTER
PORTD
PORTD DRIVER/BUFFERS
OSCILLATOR
OSCILLATOR
TIMING AND
CONTROL
DATA REGISTER
PORTC DRIVERS
PC0 - PC7
PD0 - PD7
PORTC
REG. PORTD
DATA DIR.
RESET
VCC
GND
XTAL1
XTAL1
TOSC2
TOSC1
ALE
WR
RD
PEN

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