78
Smar
tE
C
Emb
edde
d Bo
x PC
EBC
-3
3
3
0
Size: 8 bits
BIT
READ / WRITE
DESCRIPTION
7-0
R / W
Watch Dog Timer I Time-out value. Writing a non-zero value
to this register causes the counter to load the value into the
Watch Dog Counter and start counting down. If CR F2h, bits
7 and 6 are set, any Mouse Interrupt or Keyboard Interrupt
event causes the previously-loaded, non-zero value to be
reloaded to the Watch Dog Counter and the countdown
resumes. Reading this register returns the current value in
the Watch Dog Counter, not the Watch Dog Timer Time-out
value.
00h: Time-out Disable
01h: Time-out occurs after 5.03x107 CLKIN cycle time, by
analogy. (5.03x107x (1/48MHz) = 1.046s)
Table_52 – CR F1h. Watchdog Timer I(WDT1) Counter Register
CR F2h. Watchdog Timer I(WDT1) Control & Status Register
Location: Address F2h
Attribute: Read/Write
Power Well: VCC
Reset by: LRESET# or PWROK
Default: 00h
Size: 8 bits
BIT
READ / WRITE
DESCRIPTION
7
R / W
Mouse interrupt reset enables watch-dog timer reload
0: Watchdog Timer I is not affected by mouse interrupt.
1: Watchdog Timer I is reset by mouse interrupt.
6
R / W
Keyboard interrupt reset enables watch-dog timer reload
0: Watchdog Timer I is not affected by keyboard interrupt.
1: Watchdog Timer I is reset by keyboard interrupt.
5
Write “1” Only
Trigger Watchdog Timer I event. This bit is self-clearing.
4
R / W
Write “0” Clear
Watchdog Timer I status bit
0: Watchdog Timer I is running.
1: Watchdog Timer I issues time-out event.
3-0
R / W
These bits select the IRQ resource for the Watchdog Timer I
Table_53 – CR F2h. Watchdog Timer I(WDT1) Control & Status Register
Содержание EBC-3330
Страница 11: ...1 SmartEC Embedded Box PC EBC 3330 Chapter 1 GENERAL INTRODUCTION...
Страница 16: ...6 SmartEC Embedded Box PC EBC 3330 Chapter 2 HARDWARE INFORMATION...
Страница 35: ...25 SmartEC Embedded Box PC EBC 3330 Chapter 3 BIOS SETUP...
Страница 78: ...68 SmartEC Embedded Box PC EBC 3330 Chapter 4 DRIVER INSTALLATION...
Страница 81: ...71 SmartEC Embedded Box PC EBC 3330 Chapter A OPTIONAL ACCESSORIES...
Страница 86: ...76 SmartEC Embedded Box PC EBC 3330 Chapter B WATCHDOG TIMER INFORMATION...
Страница 92: ...82 SmartEC Embedded Box PC EBC 3330 Chapter C I O INFORMATION...
Страница 93: ...83 SmartEC Embedded Box PC EBC 3330 C 1 I O Address Map Photo_76 I O address map...
Страница 94: ...84 SmartEC Embedded Box PC EBC 3330 C 2 IRQ Mapping Chart Photo_77 IRQ Mapping Chart_1...
Страница 95: ...85 SmartEC Embedded Box PC EBC 3330 Photo_78 IRQ Mapping Chart_2...
Страница 96: ...86 SmartEC Embedded Box PC EBC 3330 Photo_79 IRQ Mapping Chart_3...
Страница 97: ...87 SmartEC Embedded Box PC EBC 3330 C 3 Memory Address Map Photo_80 Memory address map...