Intel Pentium M Processor Design Manual page 255

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Table 97. Intel ICH3-S Schematic Checklist (Sheet 4 of 8)
Checklist Items
LAN_CLK
LAN_RXD[2:0]
LAN_TXD[2:0],
LAN_RSTSYNC
SPKR
TP[0]
AC_SDOUT
EE_DOUT
EE_DIN
PERR#
SERR#
PLOCK#
STOP#
DEVSEL#
TRDY#
IRDY#
FRAME#
REQ#[4:0]
GPIO[0]/REQ[A]#
GPIO[1]/REQ[B]#/
REQ[5]#
PCIRST#
GNT[4:0]#
PME#
Design Guide
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Intel Pentium M Processor and Intel
Recommendations
LAN Interface Signals
Connect to LAN_CLK on Platform LAN Connect
Device.
Connect to LAN_RXD on Platform LAN Connect
Device.
Connect to LAN_TXD on Platform LAN Connect
Device.
Miscellaneous Signals
Has integrated pull-down.
8.2 k Ω – 10 k Ω pull-up to VCCSUS3.3.
No extra pull-down needed.
• Connect to EE_DIN of EEPROM. (Input
from EEPROM perspective and output from
ICH3-S perspective.)
• If unused, leave No Connect.
• Connect to EE_DOUT of EEPROM. (Ouput
from EEPROM perspective and input from
ICH3-S perspective.)
• If unused, leave No Connect.
PCI Interface Signals
8.2 k Ω ± 5% pull-up to 3.3 V, or a
2.7 k Ω ± 5% pull-up to 5 V.
Depending on the load this signal may have to
be buffered.
No external pull-up resistors are required on PCI
GNT signals. However, if external pull-up
resistors are implemented, they must be pulled
up to 3.3 V.
No extra pull-up resistor.
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E7501 Chipset Platform
Schematic Checklist
Comments
• LAN connect interface signals
may be left as NC if not used
because the input buffers are
internally terminated.
• Refer to Section 9.7.
• The integrated pull-down is
enabled only at boot/ reset for
strapping functions. At all other
times, the pull-down is disabled.
• Refer to Section 9.2.
This pin has a weak internal
pull-down.
ICH3-S contains an integrated
pull-up resistor for this signal.
ICH3-S contains an integrated
pull-up resistor for this signal.
Improves Signal Integrity.
These signals are actively driven by
the Intel ICH3-S.
This signal has integrated pull-up of
18 k Ω to 42 k Ω.
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