As an independent debugging interface module, the 3U-CPCI debugging interface module adopts a standard CPCI plug for its rear connector. The difference from the 3U boald is that its pin definitions are all located on J1 CPCI and there is no definition on J2. Tnerefore, during use, the debugging interface card should be used as a dedicated modulewith a dedicated slot and cannot be interchanged with other standard CPCI slot boards.