Datasheet

© 2007 Microchip Technology Inc. DS41250F-page 235
PIC16F913/914/916/917/946
REGISTER 16-2: WDTCON – WATCHDOG TIMER CONTROL REGISTER (ADDRESS: 105h)
TABLE 16-8: SUMMARY OF WATCHDOG TIMER REGISTERS
U-0 U-0 U-0 R/W-0 R/W-1 R/W-0 R/W-0 R/W-0
— — — WDTPS3 WDTPS2 WDTPS1 WDTPS0 SWDTEN
bit 7 bit 0
bit 7-5 Unimplemented: Read as ‘0’
bit 4-1 WDTPS<3:0>: Watchdog Timer Period Select bits
Bit Value = Prescale Rate
0000 = 1:32
0001 = 1:64
0010 = 1:128
0011 = 1:256
0100 = 1:512 (Reset value)
0101 = 1:1024
0110 = 1:2048
0111 = 1:4096
1000 = 1:8192
1001 = 1:16384
1010 = 1:32768
1011 = 1:65536
1100 = reserved
1101 = reserved
1110 = reserved
1111 = reserved
bit 0 SWDTEN: Software Enable or Disable the Watchdog Timer bit
(1)
1 = WDT is turned on
0 = WDT is turned off (Reset value)
Note 1: If WDTE Configuration bit = 1, then WDT is always enabled, irrespective of this
control bit. If WDTE Configuration bit = 0, then it is possible to turn WDT on/off with
this control bit.
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
CONFIG CPD CP MCLRE PWRTE WDTE FOSC2 FOSC1 FOSC0
OPTION_REG
RBPU INTEDG T0CS T0SE PSA PS2 PS1 PS0
WDTCON
— — — WDTPS3 WDTPS2 WSTPS1 WDTPS0 SWDTEN
Legend: Shaded cells are not used by the Watchdog Timer.
Note 1: See Register 16-1 for operation of all Configuration Word register bits.