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Intel
®
440GX AGPset Design Guide
3-17
Design Checklist
IOCHCK# Connected to ISA slots. 4.7K ohm pull-up to VCC.
IOCHRDY Connected to ISA slots and Ultra I/O. 1K ohm pull-up to VCC.
IOCS16# Connected to ISA slots. 1K ohm pull-up to VCC.
IOR# Connected to ISA slots, Ultra I/O, LM79. 8.2K ohm pull-up to VCC.
IOW# Connected to ISA slots, Ultra I/O, LM79. 8.2K ohm pull-up to VCC.
IRDY#
2.7K ohm pull-up to 5V or 10K ohm pull-up to 3V. Connect between 82443GX,
PCI slots, and PIIX4E.
IRQ0 / GPO14
UP
: No connect.
DP
: Connected to INTIN2 of IOAPIC.
IRQ8# 8.2K ohm pull-up to 3VSB.
DP
: Connected to IOAPIC through tri-state buffer.
IRQ[1,3:7]
8.2K ohm pull-up to VCC. Connected to ISA slots and Ultra I/O.
DP
: Connected to IOAPIC.
IRQ[15:14]
Connected to ISA slots, Ultra I/O, IDE. 8.2K ohm pull-up to VCC.
DP
: Connected to IOAPIC.
IRQ[9:12]
Connected to ISA slots, Ultra I/O. 8.2K ohm pull-up to VCC.
DP
: Connected to IOAPIC.
KBCCS# / GPO26 No Connect.
LA[17:23] Connected to ISA slots. 8.2K ohm pull-up to VCC.
LID / GPI10 8.2K ohm pull-down if LID is not used. Connect to wake on LAN Header if used.
MCCS# No connect.
MEMCS16# Connected to ISA slots. 1K ohm pull-up to VCC.
MEMR#,
MEMW#
Connected to ISA slots and Flash. 8.2K ohm pull-up to VCC.
DP
: Connected to IOAPIC.
NMI Part of CPU/bus frequency circuit. 2.7K ohm pull-up to 3V.
OCx Driven by USB overcurrent detection voltage divider.
OSC Connect to CK100.
PAR Connect to PCI slots and 82443GX.
PCICLK Connect to CK100.
PCIRST# Connect to AGP, PCI, and 82443GX.
PCI_STP# / GPO18 No connect, or connected to CK100 with 10K ohm pull-up to 3VSB.
PCS1# Connected to IDE connector through 33 ohm series resistor.
PCS3# Connected to IDE connector through 33 ohm series resistor.
PDA[2:0] Connected to IDE connector through 33 ohm series resistors.
PDD[15:0]
Connected to IDE connector through 33 ohm series resistors. It is
recommended that PDD[7] have a 10K ohm pull-down resistor.
PDDACK# Connected to IDE connector through 33 ohm series resistor.
PDIOR# Connected to IDE connector through 33 ohm series resistor.
PDIOW# Connected to IDE connector through 33 ohm series resistor.
PDREQ
Connected to IDE through 33 ohm series resistor. 5.6K ohm pull-down on the
PIIX4E side of the series resistor.
PGCS#0 No connect.
PGCS#1 8.2K ohm pull-up to VCC3. Connected to LM79.
Table 3-7. PIIX4E Connectivity (Sheet 2 of 4)
Signal Names Connection