Intel 440GX User Manual
Page 71

Intel
®
440GX AGPset Design Guide
3-11
Design Checklist
GADSTBA,
GADSTBB,
GDEVSEL#,
GFRAME#, GGNT#,
GIRDY#, GREQ#,
GSTOP#, GTRDY#,
8.2K ohm pull-ups to 3.3V. Connected to AGP connector.
GPAR
100K ohm pull-down required. Connect to AGP connector.
GTLREFA, GTLREFB
GTL buffer voltage reference input (1.0V = 2/3 vtt)
HA[31:3]#
Connected to CPUs.
HCLKIN
Connected to CK100 through 22 ohm series resistor.
HD[63:0]#
Connected to the CPUs.
HIT#, HITM#
Connected to CPUs.
HLOCK#
Connected to CPUs.
HREQ[4:0]#
Connected to CPUs.
HTRDY#
Connected to CPUs.
IRDY#
2.7K ohm pull-up to 5V. Connected to PCI bus.
MAA[14:0]
Connected to DIMM0 and DIMM1.
MAB[14, 13, 10],
MAB[11, 9:0]#
Connected to DIMM2 and DIMM3.
MD[63:0], MECC[7:0]
Connected to each DIMM. FET Switch Design: Connected to FET switches.
PAR
Connected to PCI bus.
PCIRST#
Connected to PIIX4E, AGP connector, and PCI connectors.
PCLKIN
Connected to CK100 through 22 ohm series resistor.
PGNT[4:0]#
8.2K ohm pull-ups to 3.3V. Connected to PCI connectors.
PHLDA#
8.2K ohm pull-up to 3.3V. Connected to PIIX4E.
PHOLD#
8.2K ohm pull-up to 3.3V. Connected to PIIX4E.
PIPE#
8.2K ohm pull-ups to 3.3V. Connected to AGP connector.
PLOCK#
2.7K ohm pull-up to 5V. Connected to PCI connectors.
PREQ[4:0]#
2.7K ohm pull-ups to 5V. Connected to PCI connectors (except PREQ4#).
RBF#
8.2K ohm pull-up to 3.3V. Connected to AGP connector.
REFVCC5
PCI 5V reference voltage for 5V tolerant buffers.
RS[2:0]#
Connected to CPUs.
SBA[7:0]
Connected to AGP connector.
SBSTB
8.2K ohm pull-up to 3.3V. Connected to AGP connector.
SCAS[B:A]#
Each connected to up to 2 DIMMs.
SERR#
2.7K ohm pull-up to 5V. Connected to PCI bus.
SRAS[B:A]#
Each connected to up to 2 DIMMs.
ST[2:0]
Connected to AGP connector.
STOP#
2.7K ohm pull-up to 5V. Connected to PCI bus.
SUSTAT#
10K ohm pull-up to 3.3V. Connect to PIIX4E for POS implementation.
TESTIN#
8.2K ohm pull-up to 3.3V which may be removed if validation permits.
Table 3-4. 82443GX Connectivity (Sheet 2 of 3)
SIGNAL
CONNECTION