Signal Description
Table 2-26. Muxed Hot Plug Mode Signals Parallel Mode (Sheet 2 of 2)
Multiplexed With
Signal
Type
Bus A
PAIRQ_[8]#
Bus B
PBIRQ_[8]#
HxBUTTON_1#
HxBUTTON_2#
HxCLKEN_1#
HxCLKEN_2#
HxM66EN_1
I
I
HPA_SOL
HPB_SOL
O
O
I
HPA_SIL#
HPB_SIL#
HPA_SOD
HPB_SOD
PAIRQ_[11]#
PAIRQ_[12]#
PAIRQ_[15]#
HPA_SLOT[0]
PAIRQ_[10]#
HPA_SID
PBIRQ_[11]#
PBIRQ_[12]#
PBIRQ_[15]#
HPB_SLOT[0]
PBIRQ_[10]#
HPB_SID
HxM66EN_2
I
HxMRL_1#
I
HxMRL_2#
I
HxPCIXCAP1_1
HxPCIXCAP1_2
HxPCIXCAP2_1
HxPCIXCAP2_2
HxPRSNT1_1#
HxPRSNT1_2#
HxPRSNT2_1#
HxPRSNT2_2#
HxPWREN_1
HxPWREN_2
HxPWRFLT_1#
HxPWRFLT_2#
HxPWRLED_1#
HxPWRLED_2#
HxRST_1#
I
I
I
PAIRQ_[9]#
HPA_SOC
PBIRQ_[9]#
HPB_SOC
I
I
HPA_SLOT[1]
PAREQ_[5]#
PAREQ_[3]#
PAREQ_[4]#
HAPWREN_1
PAGNT_[3]#
PAIRQ_[14]#
PAIRQ_[13]#
HPA_SLOT[3]
HPA_SIC
HPB_SLOT[1]
PBREQ_[5]#
PBREQ_[3]#
PBREQ_[4]#
HBPWREN_1
PBGNT_[3]#
PBIRQ_[14]#
PBIRQ_[13]#
HPB_SLOT[3]
HPB_SIC
I
I
I
O
O
I
I
O
O
O
O
HPA_PRST#
HPA_RST2#
HPB_PRST#
HPB_RST2#
HxRST_2#
2.12.6
One-Slot-No-Glue Mode
When only 1 slot is implemented, bus and clock isolation switches are not required. It is not
necessary to isolate the card from the Intel® 6700PXH 64-bit PCI Hub’s I/O buffers. The Intel®
6700PXH 64-bit PCI Hub enters this mode if HPx_SLOT[3:0] is sampled as “1111”. This section
describes special requirements for how PCI bus signals are handled in this mode.
2.12.6.1
Driving Bus To Ground When PCI Card is Disconnected
When in one-slot-no-glue mode, all PCI signals are to be driven to ground when the PCI card is
disconnected. The signals that must be driven to ground by the Intel® 6700PXH 64-bit PCI Hub
are the following:
• PxAD[63:0], PxCBE_[7:0]#, PxPAR, PxPAR64, PxREQ64#, PxACK64#
• PxFRAME#, PxIRDY#, PxTRDY#, PxSTOP#, PxDEVSEL#, PxLOCK#
52
Intel® 6700PXH 64-bit PCI Hub Datasheet
INTEL [ INTEL ]
