Texas Instruments C2000

Watchdog Timer
C2000 Microcontroller Workshop - System Initialization 5 - 9
WDPS FRC WD timeout period
Bits rollover @ 10 MHz WDCLK
00x: 1 13.11 ms *
010: 2 26.22 ms
011: 4 52.44 ms
100: 8 104.88 ms
101: 16 209.76 ms
110: 32 419.52 ms
111: 64 839.04 ms
Watchdog Period Selection
 Remember: Watchdog starts counting immediately after
reset is released!
 Reset default with WDCLK = 10 MHz computed as
(1/10 MHz) * 512 * 256 = 13.11 ms
* reset default
Watchdog Timer Control Register
SysCtrlRegs.WDCR (lab file: Watchdog.c)
WDFLAG WDDIS
7 6 5 - 3 2 - 0
WDPS
WDCHK
Logic Check Bits
Write as 101 or reset
immediately triggered
WD Prescale
Selection Bits
Watchdog Disable Bit
Write 1 to disable
(Functions only if WD OVERRIDE
bit in SCSR is equal to 1)
reserved
15 - 8
WD Flag Bit
Gets set when the WD causes a reset
• Writing a 1 clears this bit
• Writing a 0 has no effect
WDPS WDCLK =
0 0 x OSCCLK / 512 / 1
0 1 0 OSCCLK / 512 / 2
0 1 1 OSCCLK / 512 / 4
1 0 0 OSCCLK / 512 / 8
1 0 1 OSCCLK / 512 / 16
1 1 0 OSCCLK / 512 / 32
1 1 1 OSCCLK / 512 / 64