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PC87393F Datasheet(PDF) 82 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87393F
Description  100-Pin LPC SuperI/O Devices for Portable Applications
PDF  148 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87393F Datasheet(HTML) 82 Page - National Semiconductor (TI)

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4.0 WATCHDOG Timer (WDT) (Continued)
82
www.national.com
4.3.3
WATCHDOG Mask Register (WDMSK)
This register is used to determine which system events (IRQ) are enabled as WATCHDOG Timer trigger events. An enabled
IRQ event becomes a trigger event that causes the timer to reload the WDTO and restart the countdown.
This register enables or masks the trigger events that restart the WATCHDOG timer.
Location:
Offset 01h
Type:
R/W
Bit
7654
3
2
10
Name
Reserved
Serial Port 2
IRQ Trigger
Enable
Serial Port 1
IRQ Trigger
Enable
Reserved
Reset
0000
0
0
00
Bit
Description
7-4
Reserved
3
Serial Port 2 IRQ Trigger Enable. This bit enables the IRQ assigned to Serial Port 2 to trigger WATCHDOG
Timer reloading.
0: Serial Port 2 IRQ not a trigger event
1: An active Serial Port 2 IRQ enabled as a trigger event
2
Serial Port 1 IRQ Trigger Enable. This bit enables the IRQ assigned to Serial Port 1 to trigger WATCHDOG
Timer reloading.
0: Serial Port 1 IRQ not a trigger event
1: An active Serial Port 1 IRQ enabled as a trigger event
1-0
Reserved



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