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Watchdog timers are essential in remote, automated systems such as this Mars Exploration Rover. Watchdog timers are commonly found in embedded systems and other computer-controlled equipment where humans cannot easily access the equipment or would be unable to react to faults in a timely manner.
One to three USARTs, one I²C, one or two SPI, one analog comparator, four interrupt timers, state configurable timer, wake-up timer, windowed watchdog timer, 6 to 18 single-cycle GPIOs, cyclic redundancy check (CRC) engine, pin switch matrix, four low-power modes, brownout detect.
Most models support a second instruction to reset the watchdog timer, which must alternate with the first; repetitions of one instruction are ignored. This permits two independent watchdog routines to run, and failure of either will trigger the watchdog. Holtek provide two indirect addressing registers, like the enhanced 14-bit PIC.
A digital signal controller (DSC) is a hybrid of microcontrollers and digital signal processors (DSPs). Like microcontrollers, DSCs have fast interrupt responses, offer control-oriented peripherals like PWMs and watchdog timers, and are usually programmed using the C programming language, although they can be programmed using the device's native assembly language.
Automatic system recovery is a device or process that detects a computer failure and attempts recovery. The device may make use of a Watchdog timer . This may also refer to a Microsoft recovery technology by the same name.
The Low Voltage Series include the MSP430C09x and MSP430L092 parts, capable of running at 0.9 V. These 2 series of low voltage 16-bit microcontrollers have configurations with two 16-bit timers, an 8-bit analog-to-digital (A/D) converter, an 8-bit digital-to-analog (D/A) converter, and up to 11 I/O pins.
The Stop mode includes analog comparators, watchdog timers, pulse counters, I 2 C links, and external interrupts. In Shutoff mode, with 20–100 nA current consumption, depending on the product, applications have access to GPIO , reset, a real-time counter (RTC) , and retention memory.
Watchdog Timer support – Watchdog is a software timer that triggers a system reset action if the system hangs on crucial faults for an extended period of time. The watchdog mechanism can bring the system back from the nonresponsive state into normal operation by waiting until the timer goes off and subsequently rebooting the device.