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ATTINY22L

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

Atmel Corporation 

The AVR core combines a rich instruction set with 32 general purpose working registers. 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 ATtiny22/L Block Diagram

VCC

GND

PROGRAM

COUNTER

8-BIT DATA BUS

INTERNAL

OSCILLATOR

STACK

POINTER

WATCHDOG

TIMER

TIMING AND

CONTROL

RESET

PROGRAM

FLASH

SRAM

MCU CONTROL

REGISTER

INSTRUCTION

REGISTER

INSTRUCTION

DECODER

CONTROL

LINES

GENERAL

PURPOSE

REGISTERS

X

Y

Z

ALU

TIMER/

COUNTER

INTERRUPT

UNIT

EEPROM

STATUS

REGISTER

PROGRAMMING

LOGIC

SPI

DATA REGISTER

PORTB

DATA DIR.

REG. PORTB

PORTB DRIVERS

PB0 - PB4

2

ATtiny22/22L

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