Arduino Pro Mini

Atmel ATMEGA328PAU
- 8-bit CPU
- 32KB EPROM
- 2KB SRAM
- 512B EEPROM
3.3V or 5V versions
- The regulator should be marked K850(5.0V) or K833(3.3V).
  - A 5 volt part has a 16MHz resonator may be marked with "A1" or "A'N"
  - A 3.3 volt part has a 8MHz resonator may be marked with "80'0"
Several different "additional" pad configurations

Pinout