The LilyPad Arduino is a microcontroller board designed for wearables and e-textiles. It can be sewn to fabric and similarly mounted power supplies, sensors, and actuators with conductive thread.
The LilyPad Arduino can be programmed with the Arduino software. Note, the LilyPad Arduino should only be programmed with software versions 0010 or higher. You can program it with earlier versions, but all of the time-related functions will be off (twice as slow as they should be).

The ATmega168V or ATmega328V on the LilyPad comes preburned with a bootloader that allows you to upload new code to it with the Arduino software. You can also bypass the bootloader and program the ATmega through the ICSP (In-Circuit Serial Programming) header.

                                                                                                                                                                                                     
Microcontroller

ATmega328V

Operating Voltage 2.7-5.5 V

Input Voltage 2.7-5.5 V

Digital I/O Pins 14 (of which 6 provide PWM output)

Analog Input Pins 6

DC Current per I/O Pin 40 mA

Flash Memory 16 KB (of which 2 KB used by bootloader)

SRAM 1 KB

EEPROM 512 bytes

Clock Speed 8 MHz