Atmel AVR ATtiny10 Series Manual page 3

Figure 1. The ATtiny10/11 Block Diagram
VCC
GND
PROGRAM STACK
COUNTER POINTER
PROGRAM HARDWARE
FLASH STACK
INSTRUCTION
REGISTER
GENERAL-
PURPOSE
REGISTERS
INSTRUCTION
Z
DECODER
CONTROL
ALU
LINES
STATUS
REGISTER
PROGRAMMING
LOGIC
DATA REGISTER
PORTB
PORTB DRIVERS
PB0-PB5
8-BIT DATA BUS
INTERNAL
OSCILLATOR
WATCHDOG
TIMER
MCU CONTROL
REGISTER
MCU STATUS
REGISTER
TIMER/
COUNTER
INTERRUPT
UNIT
DATA DIR.
REG. PORTB
ATtiny10/11/12
TIMING AND
CONTROL
OSCILLATORS
3