Signal Description
2.12.4.1
Serial Input Stream
The input stream shifted out by the Intel® 6700PXH 64-bit PCI Hub consists of 48 bits and is
fixed. If the board implements less than 6 slots in serial mode, a bit stream value of 1 must be
shifted into the Intel® 6700PXH 64-bit PCI Hub for the slot locations not implemented. The
sequence is shown below. Since the control bits corresponding to a slot are clustered into a group
and the control bits for slot 1 come last, the Intel® 6700PXH 64-bit PCI Hub does not support
stutter mode.
Table 2-24. Serial Input Stream
Bit#
Value
Slot1_ATTNB
Bit#
Value
1
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Slot4_ATTNB
Slot4_MRL
2
Slot1_MRL
3
Slot1_PWRFLT
Slot1_PRSNT1
Slot1_PRSNT2
Slot1_PCIXCAP1
Slot1_PCIXCAP2
Slot1_M66EN
Slot2_ATTNB
Slot4_PWRFLT
Slot4_PRSNT1
Slot4_PRSNT2
Slot4_PCIXCAP1
Slot4_PCIXCAP2
Slot4_M66EN
Slot5_ATTNB
Slot5_MRL
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Slot2_MRL
Slot2_PWRFLT
Slot2_PRSNT1
Slot2_PRSNT2
Slot2_PCIXCAP1
Slot2_PCIXCAP2
Slot2_M66EN
Slot3_ATTNB
Slot5_PWRFLT
Slot5_PRSNT1
Slot5_PRSNT2
Slot5_PCIXCAP1
Slot5_PCIXCAP2
Slot5_M66EN
Slot6_ATTNB
Slot6_MRL
Slot3_MRL
Slot3_PWRFLT
Slot3_PRSNT1
Slot3_PRSNT2
Slot3_PCIXCAP1
Slot3_PCIXCAP2
Slot3_M66EN
Slot6_PWRFLT
Slot6_PRSNT1
Slot6_PRSNT2
Slot6_PCIXCAP1
Slot6_PCIXCAP2
Slot6_M66EN
2.12.4.2
Serial Output Stream
The sequence below shows how the slot outputs are scanned out in order. If the board implements
less than six slots, then the serial input bits corresponding to those slots are arbitrary and are
ignored by the Intel® 6700PXH 64-bit PCI Hub.
50
Intel® 6700PXH 64-bit PCI Hub Datasheet
INTEL [ INTEL ]
