Product specifications

VT1211 LPC SuperIO and Hardware Monitor
Revision 1.0 January 8, 2002 -37- Register Descriptions – Watch Dog I/O
Technologies, Inc.
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Watch Dog I/0 Registers
These registers are normally accessed at I/O port addresses
starting at EA00h (see LDN 9 Rx61-60 for the Watch Dog I/O
Port Base setting).
Offset 00 – Watch Dog Status 0 (01h) ..............................RO
7-1 Reserved….…… ................................ always reads 0
0 Watch Dog Time Out (WDTO) ..........................RO
0 Timeout period has expired
1 Timer still in activation or default on power up
reset values.............................................default
Offset 01 –Watch Dog Mask (00h) ..................................RW
7-3 Reserved….…… ................................ always reads 0
2 COM2 Interrupt Trigger Enable
This bit enables the COM2 IRQ to trigger Watchdog
Timer reloading and count down restart.
0 COM2 IRQ is not a trigger event...........default
1 An active COM IRQ enabled as a trigger event
1 COM1 Interrupt Trigger Enable
This bit enables the COM1 IRQ to trigger Watchdog
Timer reloading and count down restart.
0 COM1 IRQ is not a trigger event...........default
1 An active COM1 IRQ enabled as a trigger
event
0 Reserved….…… ................................ always reads 0
Offset 02 – Watch Dog Timeout (00h) ............................ RW
7-0 Watch Dog Timer Timeout Period
00h Timer halted, WDTO output inactive.... default
01h Time Period 1 minute
02h Time Period 2 minutes
……
FFh Time Period 255 minutes