ATMEL ATmega48/V ATmega88/V ATmega168/V micro controller Manual

This document describes the features and characteristics of the ATmega48/V, ATmega88/V, and ATmega168/V series of 8-bit microcontrollers, including high performance, low power consumption, advanced RISC architecture, non-volatile program and data memory, various peripheral features, and special microcontroller features.