Datasheet

xHCI Controller Registers (D20:F0)
Intel® Xeon® Processor D-1500 Product Family 435
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
11.2.33 U3OCM1 - XHCI USB3 Overcurrent Pin Mapping 1
(USB xHCI—D20:F0)
Address Offset: C8–CBh Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
13:8 OC5 Mapping Each bit position maps OC5 to a set of ports as follows: The OC5 pin is ganged
to the overcurrent signal of each port that has its corresponding bit set. It is software
responsibility to ensure that a given port‘s bit map is set only for one OC pin.
7:6 Reserved
5:0 OC4 Mapping Each bit position maps OC4 to a set of ports as follows: The OC4 pin is ganged
to the overcurrent signal of each port that has its corresponding bit set. It is software
responsibility to ensure that a given port‘s bit map is set only for one OC pin.
Bit Description
Bit 13121110 9 8
PortXXXX54
Bit 543210
PortXXXX54
Bit Description
31:30 Reserved
29:24 OC3 Mapping Each bit position maps OC3to a set of ports as follows: The OC3 pin is ganged
to the overcurrent signal of each port that has its corresponding bit set. It is software
responsibility to ensure that a given port‘s bit map is set only for one OC pin.
23:22 Reserved
21:16 OC2 Mapping Each bit position maps OC2 to a set of ports as follows: The OC2 pin is ganged
to the overcurrent signal of each port that has its corresponding bit set. It is software
responsibility to ensure that a given port‘s bit map is set only for one OC pin.
15:14 Reserved
13:8 OC1 Mapping Each bit position maps OC1 to a set of ports as follows: The OC1 pin is ganged
to the overcurrent signal of each port that has its corresponding bit set. It is software
responsibility to ensure that a given port‘s bit map is set only for one OC pin.
7:6 Reserved
5:0 OC0 Mapping Each bit position maps OC0 to a set of ports as follows: The OC0 pin is ganged
to the overcurrent signal of each port that has its corresponding bit set. It is software
responsibility to ensure that a given port‘s bit map is set only for one OC pin.
Bit 292827262524
Port 6 5 X X 2 1
Bit 212019181716
Port 6 5 X X 2 1
Bit 13121110 9 8
Port 6 5 X X 2 1
Bit 543210
Port 6 5 X X 2 1