Datasheet

3
7701F–AVR–10/12
Atmel ATtiny24/44/84 [Preliminary]
2. Overview
The Atmel
®
ATtiny24/44/84 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 ATtiny24/44/84 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
WATCHDOG
TIMER
MCU CONTROL
REGISTER
TIMER/
COUNTER0
DATA DIR.
REG.PORT A
DATA REGISTER
PORT A
PROGRAMMING
LOGIC
TIMING AND
CONTROL
MCU STATUS
REGISTER
PORT A DRIVERS
PA7-PA0
VCC
GND
+
-
ANALOG
COMPARATOR
8-BIT DATABUS
ADC
ISP INTERFACE
INTERRUPT
UNIT
EEPROM
INTERNAL
OSCILLATOR
OSCILLATORS
CALIBRATED
OSCILLATOR
INTERNAL
DATA DIR.
REG.PORT B
DATA REGISTER
PORT B
PORT B DRIVERS
PB3-PB0
PROGRAM
COUNTER
STACK
POINTER
PROGRAM
FLASH
SRAM
GENERAL
PURPOSE
REGISTERS
INSTRUCTION
REGISTER
INSTRUCTION
DECODER
STATUS
REGISTER
Z
Y
X
ALU
CONTROL
LINES
TIMER/
COUNTER1