82443GX Datasheet, PDF (106/128 Pages) Intel Corporation – Intel 440GX AGPset: 82443GX Host Bridge/Controller

Functional Description
4.8.2 82443GX Reset
The 82443GX reset function is an integral part of the suspend resume functions. The 82443GX
supports the normal reset function in a desktop platform. In this section, the power-up reset is
described. The resume from suspend sequences are described in the following section.
Table 4-13. AGPset Reset
Pentium^® II Processor
&
Pentium^® II Xeon™ Processor
A20M#, IGNNE#,
INTR, NMI
CPURST#
CRESET#
INIT#
82443GX
4x
2to1 Mux
External CPU
Clock Ratio
Straps
External CPU Strap Glue
SUB_STAT1#
PCIRST#
PIIX4E
RSTDRV
PWROK
:
Table 4-14. Reset Signals
Signal
Asserted System Devices or Signal
with PCIRST# Buses Affected
Source
Description
PCIRST#
CPURST#
RSTDRV
SUS_STAT#
INIT#
-
Always
Always
N/A
No
PCI bus, 82443GX
NB, PIIX4E
CPU
ISA bus / X-Bus
devices
CPU
PIIX4E
PCIRST# is used in power -up sequence
as well as resume from STR or STD.
82443GX
CPU reset signal. CPURST# pin resides
in 82443GX.
PIIX4E
ISA bus reset. Directly derived from
PCIRST#. Resides in PIIX4E main
voltage well.
PIIX4E
only
SUS_STAT# signals a suspend mode
entry and exit. Both signals originate
from PIIX4E in its suspend voltage well.
PIIX4E CPU Soft Reset generated by PIIX4E.
4-26
82443GX Host Bridge Datasheet