Platform Design Checklist
R
Intel
®
855PM Chipset Platform Design Guide
277
14.4. Intel
Pentium
M Processor and Intel
Celeron
M
Processor
14.4.1. Resistor
Recommendations
Intel Pentium M/Intel Celeron M Processor – Resistor Recommendations
1
Pin Name
System
Pull up/Pull
down
Series Termination
Resistor (
Notes
9
A20M#,
IGNNE#,
LINT0/INTR,
LINT1/NMI,
SLP#, SMI#,
STPCLK#
Point-to-point connection to ICH4-M.
BPM[3:0]#
If ITP700FLEX Is Used:
See Section 14.4.2.1.
If ITP Interposer Is Used:
Leave the signals as NC (No Connect).
If ITP Not Supported:
Leave the signals as NC (No Connect).
COMP[0],
COMP[2]
Pull down to GND
27.4
± 1%
Resistor placed within 0.5” of CPU pin
via a Zo = 27.4
trace. Trace should
be at least 25 mils (>50 mils preferred)
away from any other toggling signal.
See section 4.1.8 placement and
routing guidelines.
COMP[1],
COMP[3]
Pull down to GND
54.9
± 1%
Resistor placed within 0.5” of CPU pin
via a Zo = 55
trace. Trace should be
at least 25 mils (>50 mils preferred)
away from any other toggling signal.
See section 4.1.8 placement and
routing guidelines.
DBR#
If ITP700FLEX Is Used
:
Leave this signal as NC (No Connect).
If ITP Interposer is Used:
See Section 14.4.2.2
If ITP Not Supported:
Leave this signal as NC (No Connect).
DPSLP#
Daisy chain topology from ICH4-M to
CPU to MCH. DPSLP# should fork at
the pin of the CPU. T-split routing
should not be used.
See section 4.1.4.1.5 for more details.
FERR#
Pull up to VCCP
56
56
FERR# is a 1.05V tolerant signal and
voltage translation logic may be
required. Parallel termination resistor
should be placed near the ICH4-M or
system receiver. Series resistor should
Содержание 855PM
Страница 18: ...R 18 Intel 855PM Chipset Platform Design Guide This page intentionally left blank...
Страница 22: ...Introduction R 22 Intel 855PM Chipset Platform Design Guide This page intentionally left blank...
Страница 32: ...General Design Considerations R 32 Intel 855PM Chipset Platform Design Guide This page intentionally left blank...
Страница 124: ...Platform Power Requirements R 124 Intel 855PM Chipset Platform Design Guide This page intentionally left blank...
Страница 182: ...Hub Interface R 182 Intel 855PM Chipset Platform Design Guide This page intentionally left blank...
Страница 228: ...I O Subsystem R 228 Intel 855PM Chipset Platform Design Guide This page intentionally left blank...
Страница 328: ...Platform Design Checklist R 328 Intel 855PM Chipset Platform Design Guide This page intentionally left blank...