SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The PIPE_PCLK clock which drives the PIPE3 logic is sourced by the on-chip USB3_PHY. The PIPE interface is source-synchronous (that is, the clock is received from the PHY), used to synchronize USB1 PIPE inputs, and reflected back along with the PIPE outputs as the PIPE_MCLK. The PIPE_PCLK clock is turned on/off according to the USB3_PHY power control port. For more details, see Section 26.2.4.2.3, USB3_PHY Power Management.