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®
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