Design Guide
189
Schematic Checklist
DSTBN[3:0]#
4
DSTBP[3:0]#
5
•
Connect to both processors and the MCH.
•
Data strobe used to latch in
D[63:0]#
3
.
•
Maintain a 25 mil spacing from
other signals.
•
AGTL+ Strobes.
•
Refer to
FERR#
•
Connect to both processors and ICH3-S.
Pull-up at both ends of the signal with
56
Ω
± 5% to VCC_CPU.
•
Asserted by processor to indicate
floating-point error.
•
Async. GTL+.
•
Refer to
.
HIT#
•
Connect to both processors and the MCH.
•
Wired-OR signal: Route as common clock
signal.
•
Convey transaction snoop
operation results.
•
AGTL+ Common Clock I/O.
•
Refer to
HITM#
•
Connect to both processors and the MCH.
•
Wired-OR signal: route as common clock
signal.
•
Convey transaction snoop
operation results.
•
AGTL+ Common Clock I/O.
•
Refer to
HLOCK#
(LOCK#)
•
Connect to both processors and the MCH.
•
Indicates to the system that a
transaction must occur atomically.
•
AGTL+ Common Clock I/O.
•
Refer to
IERR#
•
If supported, connect to both processors and
the ICH3-S. Terminate at both ends with
56
Ω
± 5% pull-up to VCC_CPU.
•
If not supported, leave as no-connect or
connect to a Baseboard Management
Controller (BMC).
•
Asserted by the processor to
indicate an internal error.
•
Asynchronous GTL+ Output.
•
Refer to
.
IGNNE#
•
Connect to both processors and ICH3-S.
Include 200
Ω
± 5% pull-up to VCC_CPU.
•
Asserted to processor to ignore
numeric error.
•
Asynchronous GTL+ Input.
•
Refer to
.
INIT#
•
Connect to both processors, FWH and
ICH3-S. Include 200
Ω
± 5% pull-up to
VCC_CPU.
•
Voltage translator circuit is required for FWH.
•
Resets processor internal
registers without affecting internal
caches. Also used to enable BIST.
•
Asynchronous GTL+ Input.
•
Refer to
LINT1
LINT0
•
Connect to both processors and ICH3-S.
Include 200
Ω
± 5% pull-up to VCC_CPU.
•
Used as local APIC interrupts
when APIC is enabled.
•
Map to INTR and NMI in ICH3-S.
•
Asynchronous GTL+ Input.
•
Refer to
.
MCERR#
•
Connect to both processors and the MCH.
•
Wired-OR signal: Route as common clock
signal.
•
Convey transaction snoop
operation results.
•
AGTL+ Common Clock I/O.
•
Refer to
Table 13-1. Processor Schematic Checklist (Sheet 3 of 6)
Checklist Items
Recommendations
Comments
Содержание Xeon
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