ARK-1550 User Manual 46
USB Configuration
Figure 3.25 USB Configuration
– USB Precondition
This item allows users to enable or disable USB Precondition. Precondition
work on the USB host controller and root ports for faster enumeration.
– XHCI Mode
This item allows users to select mode of operation of XHCI mode.
– XHCI Idle L1
This item allows users to enable or disable XHCI Idle L1. XHCIIDLE L1 can
be set to disable for LPT-LP Ax stepping to workaround USB3 hot plug will
fail after 1 hot plug removal.
– BTCG
This item allows users to enable or disable trunk clock gating.
– USB Ports Per-Port Disable Control
This item allows users to enable or disable USB Ports Per-Port Disable Con-
trol. Control each of the USB ports (0~13) disabling
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