attiny25v ATMEL Corporation, attiny25v Datasheet - Page 4

• Manufacturer Part Number: attiny25v
• Description: Microcontroller With 2/4/8k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

2. Overview
2.1
4
Block Diagram
ATtiny25/45/85
The ATtiny25/45/85 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 ATtiny25/45/85
achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize
power consumption versus processing speed.
Figure 2-1.
The AVR core combines a rich instruction set with 32 general purpose working registers. All 32
registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent
VCC
GND
PROGRAMMING
INSTRUCTION
INSTRUCTION
PROGRAM
PROGRAM
REGISTER
COUNTER
CONTROL
Block Diagram
DECODER
FLASH
LOGIC
LINES
REGISTERS
REGISTER
PURPOSE
GENERAL
POINTER
STATUS
STACK
SRAM
ALU
X
Y
Z
DATA REGISTER
PORT B
8-BIT DATABUS
PORT B DRIVERS
PB0-PB5
REG.PORT B
DATA DIR.
MCU CONTROL
MCU STATUS
WATCHDOG
INTERFACE
UNIVERSAL
INTERRUPT
REGISTER
REGISTER
COUNTER0
COUNTER1
EEPROM
TIMER/
TIMER/
SERIAL
TIMER
DATA
UNIT
ANALOG COMPARATOR
ADC /
OSCILLATORS
CALIBRATED
OSCILLATOR
TIMING AND
INTERNAL
CONTROL
RESET
2586K–AVR–01/08