15.7.1 Watchdog Timer Control Register 0
Note:
- When the WDTCPS Configuration
bits =
‘b11111, the Reset value (q) of WDTPS is‘b01011. Otherwise, the Reset value of WDTPS is equal to the WDTCPS in Configuration bits. - When the WDTCPS in
Configuration bits ≠
‘b11111, these bits are read-only.
| Name: | WDTCON0 |
| Address: | 0x078 |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| PS[4:0] | SEN | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | q | q | q | q | q | 0 | |||
Bits 5:1 – PS[4:0] Watchdog Timer Prescaler Select(2)
| Value | Description |
|---|---|
| 0b11111 to 0b10011 | Reserved. Results in minimum interval (1 ms) |
| 0b10010 | 1:8388608 (223) (Interval 256s nominal) |
| 0b10001 | 1:4194304 (222) (Interval 128s nominal) |
| 0b10000 | 1:2097152 (221) (Interval 64s nominal) |
| 0b01111 | 1:1048576 (220) (Interval 32s nominal) |
| 0b01110 | 1:524288 (219) (Interval 16s nominal) |
| 0b01101 | 1:262144 (218) (Interval 8s nominal) |
| 0b01100 | 1:131072 (217) (Interval 4s nominal) |
| 0b01011 | 1:65536 (Interval 2s nominal) (Reset value) |
| 0b01010 | 1:32768 (Interval 1s nominal) |
| 0b01001 | 1:16384 (Interval 512 ms nominal) |
| 0b01000 | 1:8192 (Interval 256 ms nominal) |
| 0b00111 | 1:4096 (Interval 128 ms nominal) |
| 0b00110 | 1:2048 (Interval 64 ms nominal) |
| 0b00101 | 1:1024 (Interval 32 ms nominal) |
| 0b00100 | 1:512 (Interval 16 ms nominal) |
| 0b00011 | 1:256 (Interval 8 ms nominal) |
| 0b00010 | 1:128 (Interval 4 ms nominal) |
| 0b00001 | 1:64 (Interval 2 ms nominal) |
| 0b00000 | 1:32 (Interval 1 ms nominal) |
Bit 0 – SEN Software Enable/Disable for Watchdog Timer
| Value | Condition | Description |
|---|---|---|
x | If WDTE = 1x | This bit is ignored |
1 | If WDTE = 01 | WDT is turned on |
0 | If WDTE = 01 | WDT is turned off |
x | If WDTE = 00 | This bit is ignored |