PC87393VJG National Semiconductor, PC87393VJG Datasheet - Page 82

• Manufacturer Part Number: PC87393VJG
• Description: IC, SUPER I/O DEVICE, TQFP-100
• Manufacturer: National Semiconductor

Specifications of PC87393VJG

• Data Rate: 2Mbps
• Supply Voltage Range: 3V to 3.6V
• Logic Case Style: TQFP
• No. Of Pins: 100
• Operating Temperature Range: 0°C to +70°C
• Termination Type: SMD
• Transceiver Type: Interface
• Rohs Compliant: No

www.national.com
4.0 WATCHDOG Timer (WDT)
4.3.3
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:
Type:
Bit
Name
Reset
7-4
1-0
Bit
3
2
WATCHDOG Mask Register (WDMSK)
Reserved
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
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
Reserved
Offset 01h
R/W
7
0
6
0
Reserved
(Continued)
5
0
Description
4
0
82
Serial Port 2
IRQ Trigger
Enable
3
0
Serial Port 1
IRQ Trigger
Enable
2
0
1
0
Reserved
0
0