Board Name DzirUno Microcontroller ATmega328P USB connector USB Micro B Pins Built-in LED Pin 13 Digital I/O Pins 14 Analog input pins 6 PWM pins 6 Communication UART Yes I2C Yes SPI Yes Power I/O Voltage 5V Input voltage (nominal) 7–12V DC Current per I/O Pin 20 mA Power Supply Connector Barrel Plug Clock speed Main Processor ATmega328P 16 MHz USB-Serial Processor CH340 Memory ATmega328P A2KB SRAM, 32KB FLASH, 1KB EEPROM Dimensions Weight 25g Width 53.4mm Length 68.8mm