Ich4-M Checklist; Pci Interface And Interrupts - Intel 852GME Design Manual

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14.9.

ICH4-M Checklist

Note: All inputs to the ICH4-M must not be left floating. Many GPIO signals are fixed inputs that must be
pulled up to different sources.
14.9.1.

PCI Interface and Interrupts

PCI_DEVSEL#
PCI_FRAME#
PCI_GPIO0 / REQA#
PCI_GPIO1 / REQB_L/REQ5#
PCI_GPIO16 / GNTA#
PCI_IRDY#
PCI_LOCK#
PCI_PERR#
PCI_SERR#
PCI_STOP#
PCI_TRDY#
PCI_REQ[4:0]#
PCI_PME#
PCI_RST#
APICCLK
APICD[1:0]
INT_IRQ[15:14]
INT_PIRQ#[A:D]
INT_PIRQE#/GPIO2
INT_PIRQF#/GPIO3
INT_PIRQG#/GPIO4
® ®
Intel 852GME, Intel 852GMV and Intel
Pin Name System Pull-up /Pull-
8.2 k
8.2 k
8.2 k
8.2 k
8.2 k
8.2 k
8.2 k
8.2 k
8.2 k
8.2 k
8.2 k
Vcc3_3
Pull down to GND (If
NOT Used)
10 k pull-down to gnd (If
NOT Used)
8.2 k
8.2 k
®
852PM Chipset Platforms Design Guide
down
pull-up to Vcc3_3
pull-up to Vcc3_3
pull-up to Vcc3_3 Each signal requires a pull-up resistor.
GNTA is also used as a strap for "top block
swap". It is sampled on the rising edge of
PWROK. By default, this signal is HIGH
(strap function DISABLED). It can be
enabled by a pull-down to gnd through a 1-
k resistor.
pull-up to Vcc3_3
pull-up to Vcc3_3
pull-up to Vcc3_3
pull-up to Vcc3_3
pull-up to Vcc3_3
pull-up to Vcc3_3
pull-up to Vcc3_3 Each signal requires a pull-up resistor.
ICH4-M has internal pull-up to VccSus3_3.
k pull-up to
If XOR chain testing is NOT used: Pull
down the signals through a shared 10-
kohm resistor, if NOT USED.
If XOR chain testing is used: Each signal
requires a separate 10K pull-down
resistor.
pull-up to Vcc3_3 Each signal requires a pull-up resistor.
pull-up to Vcc3_3 External pull up is required for
INT_PIRQ#[A:D]. External pull up is
required when muxed signal
(INT_PIRQ[E:H]#/ GPIO[2:5]) is
Platform Design Checklist
Notes
259