Datasheet

 2010-2012 Microchip Technology Inc. DS41452C-page 89
PIC16(L)F1516/7/8/9
10.6 Register Definitions: Watchdog Control
REGISTER 10-1: WDTCON: WATCHDOG TIMER CONTROL REGISTER
U-0 U-0 R/W-0/0 R/W-1/1 R/W-0/0 R/W-1/1 R/W-1/1 R/W-0/0
— — WDTPS<4:0> SWDTEN
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
u = Bit is unchanged x = Bit is unknown -m/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set ‘0’ = Bit is cleared
bit 7-6 Unimplemented: Read as ‘0’
bit 5-1 WDTPS<4:0>: Watchdog Timer Period Select bits
(1)
Bit Value = Prescale Rate
11111 = Reserved. Results in minimum interval (1:32)
•
•
•
10011 = Reserved. Results in minimum interval (1:32)
10010 = 1:8388608 (2
23
) (Interval 256s nominal)
10001 = 1:4194304 (2
22
) (Interval 128s nominal)
10000 = 1:2097152 (2
21
) (Interval 64s nominal)
01111 = 1:1048576 (2
20
) (Interval 32s nominal)
01110 = 1:524288 (2
19
) (Interval 16s nominal)
01101 = 1:262144 (2
18
) (Interval 8s nominal)
01100 = 1:131072 (2
17
) (Interval 4s nominal)
01011 = 1:65536 (Interval 2s nominal) (Reset value)
01010 = 1:32768 (Interval 1s nominal)
01001 = 1:16384 (Interval 512 ms nominal)
01000 = 1:8192 (Interval 256 ms nominal)
00111 = 1:4096 (Interval 128 ms nominal)
00110 = 1:2048 (Interval 64 ms nominal)
00101 = 1:1024 (Interval 32 ms nominal)
00100 = 1:512 (Interval 16 ms nominal)
00011 = 1:256 (Interval 8 ms nominal)
00010 = 1:128 (Interval 4 ms nominal)
00001 = 1:64 (Interval 2 ms nominal)
00000 = 1:32 (Interval 1 ms nominal)
bit 0 SWDTEN: Software Enable/Disable for Watchdog Timer bit
If WDTE<1:0> =
00:
This bit is ignored.
If WDTE<1:0> =
01:
1 = WDT is turned on
0 = WDT is turned off
If WDTE<1:0> =
1x:
This bit is ignored.
Note 1: Times are approximate. WDT time is based on 31 kHz LFINTOSC.