12
Note:
• Port names have the name of the USB instance as a prefix, followed by the protocol name, e.g.
USB_ULPI_DIR.
• PAD ports are automatically promoted to top throughout the design hierarchy.
UTMI_DISCHRGVBUS USB_UTMI_FABRIC Out Discharge VBus (used by B devices to ensure that
VBus is low enough before starting session request
protocol (SRP))
UTMI_DPPULLDOWN USB_UTMI_FABRIC Out Enable for a pull-down resistor within the transceiver
on the D+ line. Low when the USB controller is
operating as a peripheral; High when USB controller
is operating as a host
UTMI_DMPULLDOWN USB_UTMI_FABRIC Out Enable for a pull-down resistor within the transceiver
on the D– line. Needs to be High when the USB
controller is being used for point-to-point
communications.
UTMI_IDPULLUP USB_UTMI_FABRIC Out Enable for IDDIG signal generation
UTMI_VCONTROL[3:0] USB_UTMI_FABRIC Out PHY control data; 4 bits wide as per UTMI+
specifications
UTMI_VCONTROLLOADM USB_UTMI_FABRIC Out Active low signal; asserted when new Control
information is to be read – if implemented
Table 5-2 • UTMI Ports
Port Name Port Group Direction Description
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