ATTINY40 查看數據表（PDF） - Atmel Corporation

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ATTINY40

8-bit Microcontroller with 4K Bytes In-System Programmable Flash

Atmel Corporation 

2. Overview

ATtiny40 is a low-power CMOS 8-bit microcontroller based on the compact AVR enhanced

RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny40

achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize

power consumption versus processing speed.

Figure 2-1. Block Diagram

VCC

RESET

PROGRAMMING

LOGIC

PROGRAM

FLASH

INSTRUCTION

REGISTER

INSTRUCTION

DECODER

CONTROL

LINES

ISP

INTERFACE

PROGRAM

COUNTER

STACK

POINTER

SRAM

INTERRUPT

UNIT

GENERAL

PURPOSE

REGISTERS

X

Y

Z

ALU

STATUS

REGISTER

INTERNAL

OSCILLATOR

WATCHDOG

TIMER

RESET FLAG

REGISTER

MCU STATUS

REGISTER

TIMER/

COUNTER0

TIMER/

COUNTER1

SPI

TWI

8-BIT DATA BUS

CALIBRATED

OSCILLATOR

TIMING AND

CONTROL

ANALOG

COMPARATOR

ADC

DATA REGISTER

PORT A

DIRECTION

REG. PORT A

DATA REGISTER

PORT B

DIRECTION

REG. PORT B

DATA REGISTER

PORT C

DIRECTION

REG. PORT C

DRIVERS

PORT A

DRIVERS

PORT B

DRIVERS

PORT C

PA[7:0]

PB[3:0]

PC[5:0]

GND

The AVR core combines a rich instruction set with 16 general purpose working registers and

system registers. All 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.

4 ATtiny40

8263A–AVR–08/10

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