The hardware interface for the famous low cost Igor-Plug USB firmware from Igor Cesko.

Motherboard Interface:
3 pins: D+, D-, INT.

External Interface:
USB B (device) connector

Voltage:

• 5V

Features:

• up to 115.2Kbit/s
• Only with Atmega8 @12Mhz

More information:
Igor Cesko's homepage