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AT90S2323-10PC Datasheet(PDF) 2 Page - ATMEL Corporation |
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AT90S2323-10PC Datasheet(HTML) 2 Page - ATMEL Corporation |
2 / 64 page 2 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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