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ATTINY261 Datasheet(PDF) 8 Page - ATMEL Corporation

Part No. ATTINY261
Description  High Performance, Low Power AVR
Download  16 Pages
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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ATTINY261 Datasheet(HTML) 8 Page - ATMEL Corporation

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ATtiny261/ATtiny461/ATtiny861/ATtiny461 [DATASHEET]
7753G–AVR–06/14
8
5.
AVR CPU Core
5.1
Overview
This section discusses the AVR® core architecture in general. The main function of the CPU core is to ensure correct
program execution. The CPU must therefore be able to access memories, perform calculations, control peripherals, and
handle interrupts.
Figure 5-1. Block Diagram of the AVR Architecture
In order to maximize performance and parallelism, the AVR uses a Harvard architecture – with separate memories and
buses for program and data. Instructions in the program memory are executed with a single level pipelining. While one
instruction is being executed, the next instruction is pre-fetched from the program memory. This concept enables instructions
to be executed in every clock cycle. The program memory is in-system reprogrammable flash memory.
Status and
Control
Interrupt
Unit
32 x 8
General
Purpose
Registers
ALU
Data Bus 8-bit
Data
SRAM
Watchdog
Timer
Instruction
Register
Instruction
Decoder
Analog
Comparator
EEPROM
I/O Lines
I/O Module n
Control Lines
I/O Module 2
I/O Module 1
Program
Counter
Flash
Program
Memory


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