SLVSF34B May 2019 – October 2022 TPS65987DDJ
PRODUCTION DATA
The TPS65987DDJ 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 8-15.
When a TPS65987DDJ port is operating as a sink with FRS enabled, the TPS65987DDJ monitors the CC pin voltage. If the CC voltage falls below VTH_FRS a fast role swap situation is detected and signaled to the digital core. When this signal is detected the TPS65987DDJ ceases operating as a sink and begin operating as a source.
When a TPS65987DDJ port is operating as a source with FRS enabled, the TPS65987DDJ digital core can signal to the connected port partner that a fast role swap is required by enabling the R_FRSWAP pull down on the connected CC pin. When this signal is sent the TPS65987DDJ ceases operating as the source and begin operating as a sink.