Samsung S5PC110, Руководство пользователя

Страница: 779 / 2426

S5PC110_UM 3 WATCHDOG TIMER
3-6
3.4.1.2 Watchdog Timer Data Register (WTDAT, R/W, Address = 0xE270_0004)
The WTDAT register specifies the time-out duration. The content of WTDAT cannot be automatically loaded into
the timer counter at initial watchdog timer operation. However, using 0x8000 (initial value) drives the first time-out.
In this case, the value of WTDAT is automatically reloaded into WTCNT.
WTDAT Bit Description Initial State
Reserved [31:16] Reserved 0
Count reload value [15:0] Watchdog timer count value for reload. 0x8000
3.4.1.3 Watchdog Timer Count Register (WTCNT, R/W, Address = 0xE270_0008)
The WTCNT register contains the current count values for the watchdog timer during normal operation. Note that
the content of the WTDAT register cannot be automatically loaded into the timer count register if the watchdog
timer is enabled initially, therefore the WTCNT register must be set to an initial value before enabling it.
WTCNT Bit Description Initial State
Reserved [31:16] Reserved 0
Count value [15:0] The current count value of the watchdog timer 0x8000
3.4.1.4 Watchdog Timer Interrupt Clear Register (WTCLRINT, R/W, Address = 0xE270_000C)
The WTCLRINT register is used to clear the interrupt. Interrupt service routine is responsible to clear the relevant
interrupt after the interrupt service is complete. Writing any values on this register clears the interrupt. Reading
this register is not allowed.
WTCLRINT Bit Description Initial State
Interrupt clear [31:0] Write any value to clear the interrupt -