pc87317vul National Semiconductor Corporation, pc87317vul Datasheet - Page 66

• Manufacturer Part Number: pc87317vul
• Description: Pc87317vul/pc97317vul Superi/o Plug And Play Compatible With Acpi Compliant Controller/extender
• Manufacturer: National Semiconductor Corporation

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A "wake-up" event is any event that can activate the ONCTL
signal. The "wake-up" events are masked for one second
upon return from Power Failure, except the Match event
and the RTC Alarm event. These two events are not
masked but if they occur during Power Failure or during the
one second period after return from Power Failure, they will
assert ONCTL only at the end of that one second period.
If the system is selected to respond to the MOAP bit value
(Mask ONCTL Activation in Power Failure, i.e., bit 4 of the
APCR1 register - see Section 4.5.1 "APC Control Register
1 (APCR1)" on page 70) via the APCR6 bit 6 and 7 settings,
the following occurs:
SWITCH
GPIO 12,13
GPIO10
IRRX2,1
RI2,1
P12
RING
PME2,1
Real-Time Clock (RTC) and Advanced Power Control (APC) (Logical Device 2)
Restart
Stop
V
EXISTS
DD
Event Type
SWITCH
Global Lock
Command
Management
rising/falling
Global Lock
SMI
rising/falling
RTC Alarm
high/low
SELECT
SELECT
FIGURE 4-12. POR, SCI and ONCTL Generation
Enable
SLEEP
high/low
Fail-Safe
Release
Power
Timer
ACPI
Release
BIOS
Pulse/train
Timer
SELECT
SWITCH OFF EVENT
SWITCH ON EVENT
MATCH
66
verts to its saved state, if the MOAP bit is cleared to 0. If the
MOAP bit is set to 1, ONCTL remains inactive. If MOAP = 0
when the one second delay expires, new events can acti-
vate ONCTL, unless a time match occurs during Power Fail-
ure, in which case the APC “remembers” to activate ONCTL
at the end of the one second delay.
bit (bit 7 of APCR1) are both 1, then only the Switch On
event can activate ONCTL.
One second after power returns, the ONCTL signal re-
If the MOAP bit (bit 4 of APCR1) and the Power Failure
Generator
Generator
Generator
SCI
ONCTL
POR