picoPower technology AVR Microcontroller.
32-Kbyte self-programming Flash Program Memory, 2-Kbyte SRAM, 1-KByte EEPROM, 8 Channel 10-bit A/D-converter. JTAG interface for on-chip-debug. 4 X 40 Segment LCD Driver. Up to 20 MIPS throughput at 20 MHz. 1.8 - 5.5 Volt Operation.
64-pin version: ATmega329P

100-pin version: ATmega3290P

Key Parameters:

Flash (Kbytes)	32
EEPROM (Kbytes)	1
SRAM (Bytes)	2048
Max I/O Pins	69
F.max (MHz)	20
Vcc (V)	1.8-5.5
Pb-Free Packages	TQFP 100