The DS3900 provides bidirectional communication with 2-wire and 3-wire devices using a PC's serial port. In addition, it can also be used as a general-purpose digital I/O interface with 11 I/O signals that can evaluate a wide variety of ICs. The DS3900 is intended for evaluation purposes only. Applications * Building Test Software for Systems Containing 2-Wire or 3-Wire Devices * Communicating with ICs that Require up to 11 I/O Signals * Evaluating 2-Wire and 3-Wire Devices * Prototyping 2-Wire and 3-Wire Device Designs