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28-Pin, Low-Power, High-Performance Microcontrollers with XLP Technology

PIC18F24K40 PIC18F25K40

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10 WWDT - Windowed Watchdog Timer
10.2 WWDT Operating Modes
10.2.1 WWDT Is Always On

Description
Core Features
Memory
Operating Characteristics
Power-Saving Operation Modes
eXtreme Low-Power (XLP) Features
Digital Peripherals
Analog Peripherals
Clocking Structure
Programming/Debug Features
PIC18(L)F24/25K40 Family Types
Pin Allocation Tables
1 Pin Diagrams
2 Device Overview
3 Guidelines for Getting Started with PIC18(L)F24/25K40 Microcontrollers
4 Device Configuration
5 OSC - Oscillator Module
6 REFCLK - Reference Clock Output Module
7 Power-Saving Operation Modes
8 PMD - Peripheral Module Disable
9 Resets
10 WWDT - Windowed Watchdog Timer
11 Memory Organization
12 NVM - Nonvolatile Memory Control
13 8x8 Hardware Multiplier
14 CRC - Cyclic Redundancy Check Module with Memory Scanner
15 Interrupts
16 I/O Ports
17 Interrupt-on-Change
18 PPS - Peripheral Pin Select Module
19 TMR0 - Timer0 Module
20 TMR1 - Timer1 Module with Gate Control
21 TMR2 - Timer2 Module
22 Capture/Compare/PWM Module
23 PWM - Pulse-Width Modulation
24 ZCD - Zero-Cross Detection Module
25 CWG - Complementary Waveform Generator
26 DSM - Data Signal Modulator Module
27 MSSP - Host Synchronous Serial Port Module
28 EUSART - Enhanced Universal Synchronous Asynchronous Receiver Transmitter
29 FVR - Fixed Voltage Reference
30 Temperature Indicator Module
31 DAC - 5-Bit Digital-to-Analog Converter
32 ADCC - Analog-to-Digital Converter with Computation Module
33 CMP - Comparator Module
34 HLVD - High/Low-Voltage Detect
35 ICSP™ - In-Circuit Serial Programming™
36 Register Summary
37 Instruction Set Summary
38 Electrical Specifications
39 DC and AC Characteristics Graphs and Tables
40 Packaging Information
41 Appendix A: Revision History
Microchip Information

10.2.1 WWDT Is Always On

When the WDTE bits of Configuration Words are set to ‘11’, the WWDT is always on.

WWDT protection is active during Sleep.

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