PIC12F1840 MICROCHIP [Microchip Technology], PIC12F1840 Datasheet - Page 93

• Manufacturer Part Number: PIC12F1840
• Description: 8-Pin Flash Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

10.0
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
• Configurable time-out period is from 1 ms to 256
• Multiple Reset conditions
• Operation during Sleep
FIGURE 10-1:
 2011 Microchip Technology Inc.
- WDT is always on
- WDT is off when in Sleep
- WDT is controlled by software
- WDT is always off
seconds (typical)
WDTE<1:0> = 01
WDTE<1:0> = 11
WDTE<1:0> = 10
WATCHDOG TIMER
SWDTEN
Sleep
WATCHDOG TIMER BLOCK DIAGRAM
Preliminary
LFINTOSC
23-bit Programmable
WDTPS<4:0>
Prescaler WDT
PIC12F/LF1840
WDT Time-out
DS41441A-page 93