fdc37m707 Standard Microsystems Corp., fdc37m707 Datasheet - Page 157
fdc37m707
Manufacturer Part Number
fdc37m707
Description
Fdc37m707 Enhanced Super I/o Controller With Wake-up Features
Manufacturer
Standard Microsystems Corp.
Datasheet
1.FDC37M707.pdf
(194 pages)
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WDT_CTRL
Default = 0x00
Cleared by VTR
POR
NAME
Table 73 - Auxiliary I/O, Logical Device 8 [Logical Device Number = 0x08]
REG INDEX
0xF4
Watch-dog timer Control
Bit[0] Watch-dog Status Bit, R/W
=1
=0
Bit[1] Reserved
Bit[2] Force Timeout, W
=1
Bit[3] P20 Force Timeout Enable, R/W
= 1
= 0
Note: The P20 signal will remain high for a minimum
of 1us and can remain high indefinitely. Therefore,
when P20 forced timeouts are enabled, a self-
clearing edge-detect circuit is used to generate a
signal which is ORed with the signal generated by
the Force Timeout Bit.
Bit[7:4] Reserved. Set to 0
WD timeout occurred
WD timer counting
Forces WD timeout event; this bit is self-
clearing
Allows rising edge of P20, from the
Keyboard Controller, to force the WD
timeout event.
still be forced by setting the Force Timeout
Bit, bit 2.
P20 activity does not generate the WD
timeout event.
157
DEFINITION
A WD timeout event may
STATE
C
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