February, 2007
Virtual Channel Extended Capability Registers
11.12
Virtual Channel Extended Capability Registers
This section details the PEX 8532 Virtual Channel Extended Capability registers. These registers are
duplicated for each port. The register map for one port is defined in Table 11-10.
Table 11-10. PEX 8532 Virtual Channel Extended Capability Register Map (All Ports)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Capability
Next Capability Offset (000h)
Version (1h)
Extended Capability ID (0002h)
148h
Port VC Capability 1
14Ch
150h
154h
158h
15Ch
160h
164h
168h
16Ch
1B4h
1B8h
…
Port VC Capability 2
Port VC Status
Port VC Control
Reserved
VC0 Resource Capability
VC0 Resource Control
VC0 Resource Status
VC1 Resource Status
VC1 Resource Capability
VC1 Resource Control
Reserved
170h –
Reserved
Virtual Channel Arbitration Table
1C4h
Register 11-37. 148h Virtual Channel Extended Capability (All Ports)
Serial
EEPROM
Bit(s)
Description
Type
Default
Extended Capability ID
15:0
RO
Yes
0002h
Set to 0002h, as required by the PCI Express Base r1.0a.
Capability Version
19:16
31:20
RO
RO
Yes
Yes
1h
Set to 1h, as required by the PCI Express Base r1.0a.
Next Capability Offset
000h
Set to 000h, indicating that the Virtual Channel Extended Capability is the last
extended capability in the port Extended Capability list.
ExpressLane PEX 8532AA/BA/BB/BC 8-Port/32-Lane Versatile PCI Express Switch Data Book
Copyright © 2007 by PLX Technology, Inc. All Rights Reserved – Version 1.6
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