82371AB Datasheet, PDF (38/284 Pages) Intel Corporation – PCI-TO-ISA / IDE XCELERATOR PIIX4

82371AB (PIIX4)
E
Table 2. GPO Signals
Signal
Name
Multiplexed
With
Default
Control Register and
Bit (PCI Function 1)
Notes
GPO24
RTCCS#
RTCCS#
GENCFG
Bit 29
Not available as GPO if using
external RTC that doesn’t do self
decode.
GPO25
RTCALE
RTCALE
GENCFG
Bit 30
Not available as GPO if using
external RTC that doesn’t do self
decode.
GPO26
KBCCS#
KBCCS#
GENCFG
Bit 31
Not available as GPO if using
external KBC that doesn’t do self
decode.
GPO[27:28]
GPO
Non-multiplexed GPOs which are
always available.
GPO29
IRQ9OUT# GPO
XBCS
Bit 8
Not available as GPO if using
external APIC. This signal is used for
IRQ9 output in APIC mode, where it
is level triggered, active low.
GPO30
GPO
Non-multiplexed GPO which is
always available.
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