ARDUINO LilyTiny

PinOut

All pins can be used as Digital I/O
Pin 0 → I2C SDA, PWM (LED on Model B)
Pin 1 → PWM (LED on Model A)
Pin 2 → I2C SCK, Analog
Pin 3 → Analog In (also used for USB+ when USB is in use)
Pin 4 → PWM, Analog (also used for USB- when USB is in use)
Pin 5 → Analog In

Feature

Micro MCU:ATTINY85
Wearable
8K Byte of In-System Programmable Program Memory Flash
512 Bytes In-System Programmable EEPROM
512 Bytes Internal SRAM