Signal Description
Table 2-7. Parallel Mode Hot Plug Signals – Interface A and B – 1 to 2 Slots (Sheet 4 of 4)
Signal
Type
Description
PAREQ_[4]#/
I
Slot 2 PRESENT2#: Input signal (optional). Used in conjunction with
HxPRSNT1_2# to indicate to the Intel® 6700PXH 64-bit PCI Hub whether
an add-on card is installed in the second hot plug slot and its power
requirements. This signal is directly connected to the present bits on the
PCI/PCI-X add-on card.
HAPRSNT2_2#
PBREQ_[4]#/
HBPRSNT2_2#
Only used when in dual-slot parallel hot plug mode (HPx_SLOT[3:0] =
1010).
HAPWREN_1
HBPWREN_1
O
O
Slot 1 Power Enable: Connected to slot 1 on-board power controller to
regulate current and voltage flow of the PCI slot.
Only used when in one-slot-no-glue, single-slot parallel, or dual-slot parallel
hot plug mode (HPx_SLOT[3:0] = 1111, 1001, or 1010).
PAGNT_[3]#/
HAPWREN_2
Slot 2 Power Enable: Connected to slot 2 on-board power controller to
regulate current and voltage flow of the PCI slot.
Only used when in dual-slot parallel hot plug mode (HPx_SLOT[3:0] =
1010).
PBGNT_[3]#/
HBPWREN_2
PAIRQ_[14]#/
I
I
Slot 1 Power Fault: Power controller fault indication for over-current /
under-voltage condition for the first hot plug slot. When asserted, the Intel®
6700PXH 64-bit PCI Hub, if enabled, immediately asserts reset to the slot
and disconnects the PCI slot from the bus.
HAPWRFLT_1#
PBIRQ_[14]#/
Only used when in one-slot-no-glue, single-slot parallel, or dual-slot parallel
hot plug mode (HPx_SLOT[3:0] = 1111, 1001, or 1010).
HBPWRFLT_1#
PAIRQ_[13]#/
HAPWRFLT_2#
Hot Plug Parallel Mode only - (HxPWRFLT_2#): Power controller fault
indication for over-current / under-voltage condition for the second hot plug
slot. When asserted, the Intel® 6700PXH 64-bit PCI Hub, if enabled,
immediately asserts reset to the slot and disconnects the slot from the bus.
PBIRQ_[13]#/
HBPWRFLT_2#
Only used when in dual-slot parallel hot plug mode (HPx_SLOT[3:0] =
1010).
HPA_SLOT[3]/
HAPWRLED1#
O
O
O
O
Slot 1 Power LED: Output signal connected to the green power LED
corresponding to the first hot plug slot.
HPB_SLOT[3]/
HBPWRLED1#
Only used when in one-slot-no-glue, single-slot parallel, or dual-slot parallel
hot plug mode (HPx_SLOT[3:0] = 1111, 1001, or 1010).
HPA_SIC/
HAPWRLED2#
Slot 2 Power LED: Output signal connected to the power LED
corresponding to the second hot plug slot, which is green in color.
Only used when in dual-slot parallel hot plug mode (HPx_SLOT[3:0] =
1010).
HPB_SIC/
HBPWRLED2#
HPA_PRST#/
HPA_RST1#
Slot 1 Reset: This is the slot 1 reset in the parallel hot plug mode.
Connected to the RST# pin of the first PCI hot plug slot.
Only used when in one-slot-not-glue, single-slot or dual-slot parallel hot
plug mode (HPx_SLOT[3:0] = 1111, 1001 or 1010).
HPB_PRST#/
HPB_RST1#
HPA_RST2#
HPB_RST2#
Slot 2 Reset: This is the slot 2 reset in the parallel hot plug mode.
Connected to the RST# pin of the second PCI hot plug slot.
Only used when in dual-slot parallel hot plug mode (HPx_SLOT[3:0] =
1010).
Intel® 6700PXH 64-bit PCI Hub Datasheet
27
INTEL [ INTEL ]
