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Intel
®
440GX AGPset Design Guide
3-16
Design Checklist
3.7 82371EB (PIIX4E)
3.7.1 PIIX4E Connections
Table 3-7. PIIX4E Connectivity (Sheet 1 of 4)
Signal Names Connection
48MHz Connect to CK100 through a 22 ohm series resistor.
A20GATE Connected to SIO. 8.2K ohm pull-up to VCC3.
A20M# Part of CPU/bus frequency circuit. 2.7K ohm pull-up to VCC3.
AD[31:0] Connect to PCI slots and 82443GX.
AEN Connect to SIO and ISA slots.
APICACK# / GPO12
UP
: Leave as a NC.
DP
: Connect to IOAPIC.
APICCS# / GPO13
UP
: Leave as a NC.
DP
: Connected to IOAPIC. 8.2K ohm pull-up to VCC3.
APICREQ# / GPO15 8.2K ohm pull-up to VCC3.
DP
: Connected to IOAPIC.
BALE Connect to ISA slots.
BATLOW# / GPI9 8.2K ohm pull-up to 3VSB if BATLOW# is not used.
BIOSCS# Connect to Flash.
C/BE#[3:0] Connect to PCI slots and 82443GX.
CLOCKRUN# 100 ohm pull-down.
CONFIG1 8.2K ohm pull-up to 3VSB.
CONFIG2 8.2K ohm pull-down.
CPURST Leave as a NC.
CPU_STP# / GPO17 No connect, or connected to CK100 with 10K ohm pull-up to 3VSB.
DACK#[7:0] Connect to ISA slots. DACK#[3:0] also connect to SIO.
DEVSEL#
2.7K ohm pull-up to 5V or 10K ohm pull-up to 3V. Connect between 82443GX,
PCI slots, and PIIX4E.
DREQ[7:0] Connected to ISA slots. 5.6K ohm pull-down.
EXTSMI# Connected to LM79. 8.2K ohm pull-up to 3VSB.
FERR# Connect between CPUs. 220 ohm pull-up to 2.5V.
FRAME#
2.7K ohm pull-up to 5V or 10K ohm pull-up to 3V. Connect between 82443GX,
PCI slots, and PIIX4E.
GNT[C:A]# / GPO[11:9] No connect.
GPI1
Used as PCI_PME. 8.2K ohm pull-up to 3VSB. Pull-up to 3VSB is also required
when not using this pin.
GPI[x:y] (Unused) 2.7K ohm pull-up to VCC3.
GPO[x:y] (Unused) No connect.
IDSEL 100 ohm resistor to AD18.
IGNNE# Part of CPU/bus frequency circuit. 2.7K ohm pull-up to VCC3.
INIT# Connected to CPUs. 330 ohm pull-up to 2.5V.
INTR
Part of CPU/bus frequency circuit. 2.7K ohm pull-up to VCC3.
DP
: Connected to IOAPIC.