Intel B940 Datasheet Page 143

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Datasheet, Volume 2 143
Processor Configuration Registers
14:12 RO 100b
L0s Exit Latency (L0SELAT)
This field indicates the length of time this Port requires to complete the
transition from L0s to L0.
000 = Less than 64 ns
001 = 64ns to less than 128ns
010 = 128ns to less than 256 ns
011 = 256ns to less than 512ns
100 = 512ns to less than 1us
101 = 1 us to less than 2 us
110 = 2 us – 4 us
111 = More than 4 us
The actual value of this field depends on the common Clock Configuration bit
(LCTL[6]) and the Common and Non-Common clock L0s Exit Latency values
in PEGL0SLAT (Offset 22Ch)
11:10 RW-O 11b
Active State Link PM Support (ASLPMS)
Graphics Processing Engine supports ASPM L0s and L1.
9:4 RW-O 10h
Max Link Width (MLW)
This field indicates the maximum number of lanes supported for this link.
3:0 RW-O 2h
Max Link Speed (MLS)
Supported Link Speed – This field indicates the supported Link speed(s) of
the associated Port.
Defined encodings are:
0001b = 2.5GT/s Link speed supported
0010b = 5.0GT/s and 2.5GT/s Link speeds supported
All other encodings are reserved.
B/D/F/Type: 0/1/0/PCI
Address Offset: AC–AFh
Reset Value: 02214D02h
Access: RO, RW-O
Bit Attr
Reset
Value
Description
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