ATmega644PA peripherals

CPU Registers

Registers

Pins

I/O Port

Registers

I/O Port

Registers

I/O Port

Registers

I/O Port

Registers

External Interrupts

Registers

Pins

Timer/Counter, 8-bit

Registers

Pins

Timer/Counter, 16-bit

Registers

Pins

Timer/Counter, 8-bit Async

Registers

Pins

USART

Registers

Pins

USART

Registers

Pins

Serial Peripheral Interface

Registers

Pins

Two Wire Serial Interface

Registers

Pins

Analog-to-Digital Converter

Registers

Pins

Analog Comparator

Registers

Pins

EEPROM

Registers

Watchdog Timer

Registers

JTAG Interface

Registers

Pins