Debug Connector; Figure 4 - Cexpress-Tl And Debug Module - ADLINK Technology COM Express cExpress-TL User Manual

cExpress-TL User's Guide

5.1. Debug Connector

This connector is particular useful during carrier design and bring up phase. It offers access to the following critical parts of the module:
Test points measurement of internal power rails
I2C bus for BIOS POST code readout
SPI BIOS programming interface
Embedded Controller programming interface
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Figure 4 – cExpress-TL and Debug Module
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