AT90S2343-10PI datasheet(2/64 Pages) ATMEL

Part #	AT90S2343-10PI

Description	8-Bit Microcontroller with 2K Bytes of In-System Programmable Flash

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Manufacturer	ATMEL [ATMEL Corporation]

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AT90S/LS2323/2343

1004D–09/01

Description

The AT90S/LS2323 and AT90S/LS2343 are low-power, CMOS, 8-bit microcontrollers

based on the AVR RISC architecture. By executing powerful instructions in a single

clock cycle, the AT90S2323/2343 achieves throughputs approaching 1 MIPS per MHz

allowing the system designer to optimize power consumption versus processing speed.

The AVR core combines a rich instruction set with 32 general-purpose working regis-

ters. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU),

allowing two independent registers to be accessed in one single instruction executed in

one clock cycle. The resulting architecture is more code efficient while achieving

throughputs up to ten times faster than conventional CISC microcontrollers.

Block Diagram

Figure 1. The AT90S/LS2343 Block Diagram

PROGRAM

COUNTER

INTERNAL

OSCILLATOR

WATCHDOG

TIMER

STACK

POINTER

PROGRAM

FLASH

MCU CONTROL

REGISTER

SRAM

GENERAL

PURPOSE

REGISTERS

INSTRUCTION

REGISTER

TIMER/

COUNTER

INSTRUCTION

DECODER

DATA DIR.

REG. PORTB

DATA REGISTER

PORTB

PROGRAMMING

LOGIC

TIMING AND

CONTROL

INTERRUPT

UNIT

EEPROM

SPI

STATUS

REGISTER

Z

Y

X

ALU

PORTB DRIVERS

PB0 - PB4

RESET

VCC

GND

CONTROL

LINES

8-BIT DATA BUS

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AT90S2343-10PI Datasheet(PDF) 2 Page - ATMEL Corporation

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