Powering-up/-down the USB3_PHY_TX and USB3_PHY_RX modules is triggered through software writing corresponding power-up/down commands in the CTRL_CORE_PHY_POWER_USB register of the device core control module, as follows:
- CONTROL_PHY_POWER_USB[21:14] USB_PWRCTL_CLK_CMD=0x0 (default value) commands both USB3_PHY_TX and USB3_PHY_RX to power-down (OFF) state.
- CONTROL_PHY_POWER_USB[21:14] USB_PWRCTL_CLK_CMD=0x1 powers up the USB3_PHY_RX only.
- CONTROL_PHY_POWER_USB[21:14] USB_PWRCTL_CLK_CMD=0x2 powers up the USB3_PHY_TX only.
- CONTROL_PHY_POWER_USB[21:14] USB_PWRCTL_CLK_CMD=0x3 simultaneously powers up the USB3_PHY_RX and the USB3_PHY_TX
For more information, see Control
Module.