ATmega128

The Atmel® AVR® ATmega128 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  ATmega128 achieves throughputs approaching 1MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

Peripheral Features
Programmable I/O Lines	53 Programmable I/O Lines
Timers	Two 8-bit Timer/Counters and Two Expanded 16-bit Timer/Counters with Separate Prescalers and Compare Modes
ADC	8-channel, 10-bit ADC
Serial Interface	2 Programmable Serial USARTs
Master / Slave Interface	SPI Serial Interface
PWM	Two 8-bit PWM Channels and 6 PWM Channels with Programmable Resolution from 2 to 16 Bits
Watch Dog Timer	Programmable Watch Dog Timer With on chip Oscillator
Power Supply
Type	DC
Operating Voltage	2.7V - 5.5V
Special Features
Internal Oscillator	Internal Calibrated Oscillator
External Oscillator	Up to 16 MHz
Interrupt Source	External and Internal
Clock Frequency Setting	Adjustable through Software