Design Guide
109
Intel
®
82870P2 (P64H2)
8.2.6.7
Hot Plug Muxed Signals in Dual Slot Parallel Mode
The Hot Plug signals that connect to the controller are as follows:
NOTES:
.
1. HPx_SLOT [N] are pull-ups/pull-downs. When in dual slot parallel mode, the external logic that decodes the
three-state value of PCIXCAP from the card must actively drive these signals to either logic 1 or logic 0 to
overcome the value of the pull-up/pull-down, and must be tri-stated during reset and while the card is not
connected to avoid damaging the slot count value.
2. HPx_SID must be pulled down on the system board when configuring the P64H2 for dual slot parallel mode
so that the LED for slot B on busses A and B remain off during reset.
3. The P64H2 must drive this signal to the corresponding state shown in
for dual slot parallel mode so that LEDs are in the appropriate state (off), and the Q-switches remain
disconnected. Note that the placement of the signals should be such that the value driven by the P64H2 in
dual slot parallel mode is the same value it would have driven if in serial mode.
4. In parallel mode, the BUSEN# and CLKEN# signals become active low instead of active high, as they are
during serial mode.
Table 8-12. Dual Slot Parallel Mode Hot Plug Signals Table
Signal
Type
Muxed Intel
®
P64H2 Pin
Note
Bus A
Ball #
Bus B
Ball #
HxSWITCHA
I
PA_IRQ[15]
F4
PB_IRQ[15]
F1
HxFAULTA#
I
PA_IRQ[14]
E4
PB_IRQ[14]
E1
HxPRSNT2A#
I
PA_IRQ[13]
F5
PB_IRQ[13]
D1
HxPRSNT1A#
I
PA_IRQ[12]
E5
PB_IRQ[12]
C1
HxM66ENA
I/O
PA_IRQ[11]
D5
PB_IRQ[11]
B1
HxPCIXCAP1A
I
HPA_SLOT[2]
D20
HPB_SLOT[2]
D22 1
HxPCIXCAP2A
I
HPA_SLOT[1]
C20
HPB_SLOT[1]
C23 1
HxRESETA#
O
PA_GNT[5]
E22
PB_GNT[5]
G4 3
HxGNLEDA
O
HPA_SOC
A19
HPB_SOC
A24 3
HxAMLEDA
O
HPA_SOL
D19
HPB_SOL
C22 3
HxBUSENA#
O
HPA_SORR#
A18
HPB_SORR#
A22 3,
4
HxCLKENA#
O
HPA_SIL#
C21
HPB_SIL#
D24 3,
4
HxPWRENA
O
HPA_SOD
B19
HPB_SOD
C24
3
HxSWITCHB
I
PA_IRQ[10]
C5
PB_IRQ[10]
F2
HxFAULTB#
I
PA_IRQ[9]
B5
PB_IRQ[9]
E2
HxPRSNT2B#
I
PA_IRQ[8]
A5
PB_IRQ[8]
D2
HxPRSNT1B#
I
PA_REQ[5]
F24
PB_REQ[5]
G3
HxM66ENB
I/O
PA_REQ[4]
F21
PB_REQ[4]
H4
HxPCIXCAP1B
I
PA_REQ[3]
F19
PB_REQ[3]
H2
HxPCIXCAP2B
I
HPA_SLOT[0]
A20
HPB_SLOT[0]
B2 1
HxRESETB#
O
HPA_SOR#
B18
HPB_SOR#
A21 3
HxGNLEDB
O
HPA_SIC
A23
HPB_SIC
A23 3
HxAMLEDB
O
HPA_SID
B24
HPB_SID
B24 2
HxBUSENB#
O
PA_GNT[4]
F23
PB_GNT[4]
H5 3,
4
HxCLKENB#
O
PA_GNT[3]
F20
PB_GNT[3]
H3 3,
4
HxPWRENB
O
HPA_SOLR
C19
HPB_SOLR
B22
3
Содержание Xeon
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