ATTINY261_14 Datasheet, PDF (5/206 Pages) ATMEL Corporation – High Performance, Low Power AVR

2. Overview
The Atmel^® ATtiny261/461/861 is a low-power CMOS 8-bit microcontroller based on the AVR^® enhanced RISC architecture.
By executing powerful instructions in a single clock cycle, the Atmel ATtiny261/461/861 achieves throughputs approaching
1MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
2.1 Block Diagram
Figure 2-1. Block Diagram
GND VCC
Watchdog
Timer
Watchdog
Oscillator
Oscillator
Circuits/
Clock
Generation
EEPROM
Power
Supervision
POR/ BOD
and
RESET
debugWIRE
Program
Logic
Flash
SRAM
AVR CPU
Timer/
Counter 0
USI
Timer/
Counter 1
Analog
Comp.
A/D Conv.
Internal
Bandgap
AVCC
GND
AREF
PORT B (8)
3
PORT A (8)
PB[0..7]
PA[0..7]
11
RESET
XTAL[1..2]
ATtiny261/ATtiny461/ATtiny861/ATtiny461 [DATASHEET]
5
7753G–AVR–06/14