The DDC101 Evaluation Fixture is a modular design. Withthe use of the common DDC101 Evaluation Fixture PCInterface Board, different Device Under Test (DUT) Boardsmay be used. Different DUT boards can be used to evaluatesingle or up to 32 DDC101s in any package type. Design ofthe DUT boards and their use are detailed in the DDC101Evaluation Fixture product data sheet.This application note focuses on how to communicate directlyto the PC Interface Board through a PC’s printer port.This communication is used to configure the PC InterfaceBoard as well as to configure and retrieve data from theDDC101s on the DUT Board. This will allow the user towrite custom software to create user specific, extendedcapabilities not available in the standard program.The software for the DDC101 Evaluation Board was writtenin Turbo Pascal®. The code can be readily modified to beused with other languages. All software examples listed useTurbo Pascal syntax.