gKINO-DMF SBC
Page 116
NOTE:
The following discussion applies to DOS. Contact IEI support or visit the IEI
website for drivers for other operating systems.
The Watchdog Timer is a hardware-based timer that attempts to restart the system when it
stops working. The system may stop working because of external EMI or software bugs.
The Watchdog Timer ensures that standalone systems like ATMs will automatically
attempt to restart in the case of system problems.
A BIOS function call (INT 15H) is used to control the Watchdog Timer.
INT 15H:
AH – 6FH Sub-function:
AL – 2:
Sets the Watchdog Timer’s period.
BL:
Time-out value (Its unit-second is dependent on the item “Watchdog
Timer unit select” in CMOS setup).
Table F-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.
Содержание gKINO-DMF-216-R10
Страница 2: ...gKINO DMF SBC Page II Revision Date Version Changes June 29 2017 1 00 Initial release ...
Страница 12: ...gKINO DMF SBC Page XII Table 4 2 M 2 and SATA2 Select Switch Settings 59 Table 5 1 BIOS Navigation Keys 65 ...
Страница 14: ......
Страница 15: ...gKINO DMF SBC Page 1 Chapter 1 1 Introduction ...
Страница 19: ...gKINO DMF SBC Page 5 Figure 1 3 Connectors Solder Side ...
Страница 20: ...gKINO DMF SBC Page 6 1 5 Dimensions The dimensions of the board are listed below Figure 1 4 Dimensions mm ...
Страница 25: ...gKINO DMF SBC Page 11 Chapter 2 2 Unpacking ...
Страница 29: ...gKINO DMF SBC Page 15 Chapter 3 3 Connectors ...
Страница 31: ...gKINO DMF SBC Page 17 Figure 3 2 Connector and Jumper Locations Rear ...
Страница 63: ...gKINO DMF SBC Page 49 Chapter 4 4 Installation ...
Страница 77: ...gKINO DMF SBC Page 63 Chapter 5 5 BIOS ...
Страница 112: ...gKINO DMF SBC Page 98 Chapter 6 6 Software Drivers ...
Страница 115: ...gKINO DMF SBC Page 101 Appendix A A Regulatory Compliance ...
Страница 117: ...gKINO DMF SBC Page 103 B Product Disposal Appendix B ...
Страница 119: ...gKINO DMF SBC Page 105 Appendix C C BIOS Menu Options ...
Страница 122: ...gKINO DMF SBC Page 108 Appendix D D Terminology ...
Страница 126: ...gKINO DMF SBC Page 112 Appendix E E Digital I O Interface ...
Страница 129: ...gKINO DMF SBC Page 115 Appendix F F Watchdog Timer ...
Страница 132: ...gKINO DMF SBC Page 118 Appendix G G Hazardous Materials Disclosure ...