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AT90S4433 Datasheet(PDF) 4 Page - ATMEL Corporation

Part No. AT90S4433
Description  8-Bit AVR Microcontroller with 4K Bytes of In-System Programmable Flash
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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 4 page
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4
AT90S/LS4433
1042H–AVR–04/03
Block Diagram
Figure 1. The AT90S4433 Block Diagram
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. PORTC
DATA REGISTER
PORTB
DATA REGISTER
PORTC
ANALOG MUX
ADC
DATA REGISTER
PORTD
PROGRAMMING
LOGIC
TIMING AND
CONTROL
OSCILLATOR
INTERRUPT
UNIT
EEPROM
SPI
UART
STATUS
REGISTER
Z
Y
X
ALU
PORTB DRIVERS
PORTC DRIVERS
PORTD DRIVERS
PB0 - PB5
PC0 - PC5
RESET
VCC
AVCC
AGND
AREF
GND
XTAL2
XTAL1
CONTROL
LINES
ANALOG
COMPARATOR
PD0 - PD7
8-BIT DATA BUS
DATA DIR.
REG. PORTD




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