Intel B940 Ficha Técnica Página 147

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Datasheet, Volume 2 147
Processor Configuration Registers
9:4 RO 00h
Negotiated Link Width (NLW)
This field indicates negotiated link width. This field is valid only when the link
is in the L0, L0s, or L1 states (after link width negotiation is successfully
completed).
00h = Reserved
01h = X1
02h = X2
04h = X4
08h = X8
10h = X16
All other encodings are reserved.
3:0 RO 0h
Current Link Speed (CLS)
This field indicates the negotiated Link speed of the given PCI Express Link.
Defined encodings are:
0001b = 2.5 GT/s PCI Express Link
0010b = 5 GT/s PCI Express Link
All other encodings are reserved. The value in this field is undefined when the
Link is not up.
B/D/F/Type: 0/1/0/PCI
Address Offset: B2–B3h
Reset Value: 1000h
Access: RW1C, RO
Bit Attr
Reset
Value
Description
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