KINO-PVN-D5251/D4251/ Mini ITX SBC
Page 127
AH – 6FH Sub-function:
BL:
Time-out value (Its unit-second is dependent on the item “Watchdog
Timer unit select” in CMOS setup).
Table E-1: AH-6FH Sub-function
Call sub-function 2 to set the time-out period of Watchdog Timer first. If the time-out value
is not zero, the Watchdog Timer starts counting down. When the timer value reaches zero,
the system resets. To ensure that this reset condition does not occur, calling sub-function
2 must periodically refresh the Watchdog Timer. However, the watchdog timer is disabled
if the time-out value is set to zero.
A tolerance of at least 10% must be maintained to avoid unknown routines within the
operating system (DOS), such as disk I/O that can be very time-consuming.
NOTE:
The Watchdog Timer is activated through software. The software
application that activates the Watchdog Timer must also deactivate it
when closed. If the Watchdog Timer is not deactivated, the system will
automatically restart after the Timer has finished its countdown.
EXAMPLE PROGRAM:
; INITIAL TIMER PERIOD COUNTER
;
W_LOOP:
;
MOV
AX, 6F02H
;setting the time-out value
MOV
BL, 30
;time-out value is 48 seconds
INT
15H
;
; ADD THE APPLICATION PROGRAM HERE
;
Summary of Contents for KINO-PVN-D5251
Page 14: ...KINO PVN D5251 D4251 Mini ITX SBC Page xiv...
Page 15: ...KINO PVN D5251 D4251 Mini ITX SBC Page 1 Chapter 1 1 Introduction...
Page 24: ...KINO PVN D5251 D4251 Mini ITX SBC Page 10 Chapter 2 2 Unpacking...
Page 28: ...KINO PVN D5251 D4251 Mini ITX SBC Page 14 Chapter 3 3 Connectors...
Page 51: ...KINO PVN D5251 D4251 Mini ITX SBC Page 37 Chapter 4 4 Installation...
Page 73: ...KINO PVN D5251 D4251 Mini ITX SBC Page 59 Figure 4 19 Graphics Driver Installation Reminder...
Page 74: ...KINO PVN D5251 D4251 Mini ITX SBC Page 60 Chapter 5 5 BIOS Screens...
Page 102: ...KINO PVN D5251 D4251 Mini ITX SBC Page 88 Appendix A A BIOS Options...
Page 105: ...KINO PVN D5251 D4251 Mini ITX SBC Page 91 Appendix B B One Key Recovery...
Page 133: ...KINO PVN D5251 D4251 Mini ITX SBC Page 119 Appendix C C Terminology...
Page 137: ...KINO PVN D5251 D4251 Mini ITX SBC Page 123 Appendix D D Digital I O Interface...
Page 143: ...KINO PVN D5251 D4251 Mini ITX SBC Page 129 Appendix F F Hazardous Materials Disclosure...
