SLVSG37 June 2021 TPS65994AE
PRODUCTION DATA
The TPS65994AE cable plug block contains additional circuitry that may be used to support the Fast Role Swap (FRS) behavior defined in the USB Power Delivery Specification. The circuitry provided for this functionality is detailed in Figure 8-16.
When a TPS65994AE port is operating as a sink with FRS enabled, the TPS65994AE monitors the CC pin voltage. If the CC voltage falls below VFRS for tFRS_DET a fast role swap signal is detected and indicated to the digital core. When this signal is detected the TPS65994AE ceases operating as a sink (disables Px_GATE_VSYS and Px_GATE_VBUS) and begins operating as a source.