Intel Xeon Processor and Intel E7500/E7501Chipset Compatible Platform Design Guide

Schematic Checklist
240 Intel
®
Xeon™ Processor and Intel
®
E7500/E7501 Chipset Compatible Platform Design Guide
Hot-Plug – Dual-Slot Parallel Mode Specific
HPx_SLOT[2:0]
1
SLOT[0]: 8.2 kΩ pull-down to ground.
SLOT[1]: 8.2 k
Ω pull-up to 3.3 V.
SLOT[2]: 8.2 k
Ω pull-down to ground.
• This is a strapping pin for
enabling single slot parallel
mode which is latched during
reset. SLOT[1] also functions as
the HxPCIXCAP2A input when
not in reset. SLOT2 also
functions as the HxPCIXCAP1A
input when not in reset. Refer to
Table 8-15.
PxIRQ15
1
PxIRQ10
1
•8.2Ω – 10 kΩ pull-up to 3.3 V. • A logic 1 on this pin indicates to
the controller that the PCI slot
should be immediately powered
off. This signal is also
connected to a SPST switch to
ground which when pressed
indicates by means of a logic 0
that the slot can be powered on.
PxIRQ[9:8]
1
PxIRQ[14:11]
1
•8.2 kΩ ± 5% pull-up to 3.3 V. • These signals are mapped to
Hot-Plug functions in dual-slot
Hot-Plug mode.
PxSID
1
•8.2 kΩ ± 5% pull-down to ground. • This insures that the LED for
slot B on busses A and B
remain off during reset.
Hot-Plug – Serial Mode Specific
HPx_SLOT[2:0]
1
• Pulled to 3.3 V or ground through an
8.2 k
Ω ± 5% resistor depending on the
number of PCI Hot-Plug slots to be enabled.
• Refer to Section 8.2.5.1.
Hot-Plug – Disabled
HPx_SLOT[2:0] • 8.2 kΩ ± 5% pull-down to ground. • HPx_SLOT[2:0] signals should
be strapped to zero to disable
Hot-Plug mode.
HPx_SID • 8.2 k
Ω ± 5% pull-up to 3.3 V or pull-down to
ground.
• Unused inputs should not float.
HPx_SIC
HPx_SIL#
HPx_SOR#
HPx_SORR#
HPx_SOC
HPx_SOL
HPx_SOLR
HPx_SOD
• If disabling Hot-Plug mode, these signals can
be left as no connect.
SMBus Interface
SDTA
SCLK
•8.2 kΩ ± 5% pull-up to 3.3 V. Note that only
one pull-up is needed per signals on the entire
bus.
• Value of pull-up resistors
determined by line load, from
Section 9.5.4.
Table 13-4. Intel
®
P64H2 Schematic Checklist (Sheet 3 of 4)
Checklist Items Recommendations Comments