protech PS8852, Руководство пользователя

Страница: 51 / 121

Chapter 3 Software Configuration
PS8852 USER
′
S MANUAL
Page:3-11
3-10. WATCHDOG TIMER CONFIGURATION
The Watch-dog Timer has a programmable time-out ranging from 1 to 255 minutes
with one minute resolution, or 1 to 255 seconds with 1 second resolution. The units of
the WDT timeout value are selected via bit[7] of the WDT_TIMEOUT register,
which is located on I/O Port address 0x865h. The WDT time-out value is set through
the WDT_VAL Runtime register, which is located on I/O Port address 0x866h.
Setting the WDT_VAL register to 0x00 disables the WDT function Setting the
WDT_VAL to any other non-zero value will cause the WDT to reload and begin
counting down from the value loaded. Setting the Register located on I/O address
0x867h and 0x868h as 00h to finish timer configuration.
Example Program