Mobile Intel Pentium 4 Processor - M and Intel 845MP/MZ Chipset Platform Design Guide

Mobile Intel
®
Pentium
®
4 Processor-M and Intel
®
845MP/845MZ Chipset Platform
198 Design Guide
R
12.11. ICH3-M Checklist
Table 84. PCI Resistor Recommendation
ICH3-M – PCI Resistor Recommendations
Signal System
Pull-up/Pull-down
Ω
ΩΩ
Ω Series
Damping
Notes 9
99
9
PCI_FRAME#,
PCI_IRDY#,
PCI_TRDY#,
PCI_STOP#
Pull-up to V3.3S 8.2 k
Ω Alternative system can be 2.7
k
Ω pull-up to V5S
PCI_PERR#,
PCI_SERR#,
PCI_DEVSEL#,
PCI_LOCK#
Pull-up to V3.3S 8.2 k
Ω Alternative system can be 2.7
k
Ω pull-up to V5S
PCI_GPIO0/
REQA#,
PCI_GPIO1/
REQB#/REQ5#,
PCI_REQ#[4:0]
Pull-up to V3.3S 8.2 k
Ω Alternative system can be 2.7
k
Ω pull-up to V5S
PCI_RST# 22 Ω or 33 Ω Should be buffered to form
IDE_RST# for improved signal
integrity
PCI_PME# Has integrated pull-up
PCI_GNT#[4:0] External pull-up not
required. If external
resistors implemented,
they must be pulled up
to V3.3S
PCI_GPIO16/
GNTA#,
PCI_GPIO17/
GNTB#/GNT5#
Has integrated pull-up; GNT[A]
has an added strap function of
“top block swap”. The signal is
sampled on the rising edge of
PWROK. Default value is high
or disabled due to pull-up. A
Jumper to a pull down resistor
can be added to manually
enable the function.
INT_IRQ[15:14],
INT_SERIRQ
Pull-up to V3.3S 8.2 kΩ Open drain signal.
INT_PIRQ[D:A]# Pull-up to V3.3S 8.2 kΩ Alternative system can be 2.7
k
Ω pull-up to V5S
INT_PIRQ[H:E]#/
GPIO[5:2]
Pull-up to V3.3S 8.2 kΩ Alternative system can be 2.7
k
Ω pull-up to V5S
INT_APICD[1:0] Connect to GND 10 kΩ Connect both signals through
one 10 k
Ω resistor
INT_APICCLK Connect to GND
NOTE: Default tolerance for resistors is ± 5% unless otherwise specified.