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Zynq-7000 AP SoC Technical Reference Manual www.xilinx.com 1840
UG585 (v1.11) September 27, 2016
Appendix B: Register Details
Register (usb) ULPI_VIEWPORT
Register ULPI_VIEWPORT Details
The register provides indirect access to the ULPI PHY register set. Although the core performs access to the
ULPI PHY register set, there may be extraordinary circumstances where software may need direct access.
IC1 3 rw 0x0 Inter-Chip transceiver enable 1. These bits enables
the Inter-Chip transceiver for each port (for the
MPH case). To enable the interface, the bits PTS
must be set to '011b' in the PORTSC1. Writing a '1'
to each bit selects the IC_USB interface for that
port. If the Controller is not a MPH
implementation, IC8 to IC2 will be '0' and
Read-Only.
IC_VDD1 2:0 rw 0x0 Inter-Chip voltage selection 1 -- Host mode.
Select the voltage being supplied to the
peripheral:
000: No voltage
001: 1.0V
010: 1.2V
011: 1.5V
100: 1.8V
101: 3.0V
110, 111: reserved
The voltage negotiation should happen between
enabling port power (PP) in PORTSC1 register
and asserting the run/stop bit in USBCMD
register.
Device Mode: Read-only and equals 000.
Name ULPI_VIEWPORT
Software Name ULPIVIEW
Relative Address 0x00000170
Absolute Address usb0: 0xE0002170
usb1: 0xE0003170
Width 32 bits
Access Type mixed
Reset Value 0x08000000
Description ULPI Viewport
Field Name Bits Type Reset Value Description