PIC16LF1507 Datasheet, PDF (79/266 Pages) Microchip Technology – 20-Pin Flash, 8-Bit Microcontrollers

PIC16(L)F1507
9.0 WATCHDOG TIMER
The Watchdog Timer is a system timer that generates
a Reset if the firmware does not issue a CLRWDT
instruction within the time-out period. The Watchdog
Timer is typically used to recover the system from
unexpected events.
The WDT has the following features:
• Independent clock source
• Multiple operating modes
- WDT is always on
- WDT is off when in Sleep
- WDT is controlled by software
- WDT is always off
• Configurable time-out period is from 1 ms to 256
seconds (typical)
• Multiple Reset conditions
• Operation during Sleep
FIGURE 9-1:
WATCHDOG TIMER BLOCK DIAGRAM
WDTE<1:0> = 01
SWDTEN
WDTE<1:0> = 11
WDTE<1:0> = 10
Sleep
LFINTOSC
23-bit Programmable
Prescaler WDT
WDTPS<4:0>
WDT Time-out
DS41586A-page 79
Preliminary
 2011 Microchip Technology Inc.