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Specification Sheet

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PCI Express* Controller (x16) Registers
406 Datasheet, Volume 2 of 2
12.51 Port VC Capability Register 2 (PVCCAP2)—Offset
108h
Describes the configuration of PCI Express Virtual Channels associated with this port.
Access Method
Default: 0h
3
1
2
8
2
4
2
0
1
6
1
2
8
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
RSVD
LPEVCC
RSVD
EVCC
Bit
Range
Default &
Access
Field Name (ID): Description
31:7
0h
RO
Reserved (RSVD): Reserved.
6:4
0h
RO
LPEVCC: Low Priority Extended VC Count: Indicates the number of (extended) Virtual
Channels in addition to the default VC belonging to the low-priority VC (LPVC) group
that has the lowest priority with respect to other VC resources in a strict-priority VC
Arbitration.
The value of 0 in this field implies strict VC arbitration.
3
0h
RO
Reserved (RSVD): Reserved.
2:0
0h
RO
EVCC: Extended VC Count: Indicates the number of (extended) Virtual Channels in
addition to the default VC supported by the device.
Type: CFG
(Size: 32 bits)
Offset: [B:0, D:1, F:0] + 108h
3
1
2
8
2
4
2
0
1
6
1
2
8
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
VCATO
RSVD
VCAC