JAJSFH6D May 2018 – October 2022 TPS65987D
PRODUCTION DATA
To enable HPD signaling through PD messaging, a single pin is used as the HPD input and output for each port. When events occur on these pins during a DisplayPort connection though the Type-C connector (configured by firmware), hardware timers trigger and interrupt the digital core to indicate needed PD messaging. When one of the TPS65987D's ports is operating as a DP source, its corresponding HPD pin operates as an output (HPD TX), and when a port is operating as a DP sink, its corresponding HPD pin operates as an input (HPD RX). When DisplayPort is not enabled via firmware the HPD pin operates as a generic GPIO (GPIO3).