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PC87364-XXX/VLA Datasheet(PDF) 137 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87364-XXX/VLA
Description  128-Pin LPC SuperI/O with Extended Wake-Up and Protection Support
PDF  180 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87364-XXX/VLA Datasheet(HTML) 137 Page - National Semiconductor (TI)

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7.0 WATCHDOG Timer (WDT) (Continued)
135
www.national.com
7.3.4
WATCHDOG Status Register (WDST)
This register holds the WATCHDOG Timer status, which reflects the value of the WDO pin and indicates that the timeout
period has expired.
On reset or on WATCHDOG Timer activation, this register is initialized to 01h.
Location:
Offset 02h
Type:
RO
7.4
WATCHDOG TIMER REGISTER BITMAP
Bit
76543210
Name
Reserved
WDO Value
Reset
00000001
Required
0
Bit
Description
7-1
Reserved
0
WDO Value. This bit reflects the value of the WDO signal (even if WDO is not configured for output).
0: WDO active
1: WDO inactive (default)
Register
Bits
Offset
Mnemonic
7
6
5
4
3
2
1
0
00h
WDTO
Programmed Timeout Period
01h
WDMSK
Reserved
Serial Port 2
IRQ
Trigger
Enable
Serial Port 1
IRQ
Trigger
Enable
Mouse IRQ
Trigger
Enable
KBD IRQ
Trigger
Enable
02h
WDST
Reserved
WDO
Value



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