Книга: Advanced PIC Microcontroller Projects in C
1.3.4 Watchdog
1.3.4 Watchdog
Most microcontrollers have at least one watchdog facility. The watchdog is basically a timer that is refreshed by the user program. Whenever the program fails to refresh the watchdog, a reset occurs. The watchdog timer is used to detect a system problem, such as the program being in an endless loop. This safety feature prevents runaway software and stops the microcontroller from executing meaningless and unwanted code. Watchdog facilities are commonly used in real-time systems where the successful termination of one or more activities must be checked regularly.
Оглавление книги
Оглавление статьи/книги
- 1.3.1 Supply Voltage
- 1.3.2 The Clock
- 1.3.3 Timers
- 1.3.4 Watchdog
- 1.3.5 Reset Input
- 1.3.6 Interrupts
- 1.3.7 Brown-out Detector
- 1.3.8 Analog-to-Digital Converter
- 1.3.9 Serial Input-Output
- 1.3.10 EEPROM Data Memory
- 1.3.11 LCD Drivers
- 1.3.12 Analog Comparator
- 1.3.13 Real-time Clock
- 1.3.14 Sleep Mode
- 1.3.15 Power-on Reset
- 1.3.16 Low-Power Operation
- 1.3.17 Current Sink/Source Capability
- 1.3.18 USB Interface
- 1.3.19 Motor Control Interface
- 1.3.20 CAN Interface
- 1.3.21 Ethernet Interface
- 1.3.22 ZigBee Interface