The Microchip ATmega88 CMOS 8-bit microcontroller is based on the AVR enhanced RISC architecture. It operates on 2.7V to 5.5V voltage range. It features 8 KB ISP Flash memory with read-while-write capabilities, 512B EEPROM, 1 KB SRAM, 23 general purpose I/O lines, 32 general purpose working registers, three flexible timer/counters with compare modes, internal and external interrupts, serial programmable USART, a byte-oriented Two-Wire serial interface, SPI serial port, 6-channel 10-bit A/D converter (8-channels in TQFP and QFN/MLF packages), programmable watchdog timer with internal oscillator, and five software selectable power saving modes.

Up to 20 MIPS throughput at 20MHz
On-chip 2-cycle multiplier
In-system programming by on-chip boot program
Programming lock for software security
Two 8-bit timer/counters with separate prescaler and compare mode
One 16-bit timer/counter with separate prescaler, compare mode, and capture mode
Master/slave SPI serial interface
Byte-oriented 2-wire serial interface
Programmable watchdog timer with separate on-chip oscillator
On-chip analog comparator
Interrupt and wake-up on pin change
DebugWIRE on-chip debug system
Power-on reset and programmable brown-out detection
Internal calibrated oscillator
External and internal interrupt sources
32-pad QFN/MLF package