Since its establishment, the company has established the business philosophy of "safety and efficiency, quality first, reputation first" and adhered to the corporate philosophy of "customer first, quality service, technology-based and perfection". The selection of control mode of high voltage circuit breaker is related to the control mode and scale of substation.
ZW32-12 Watch Dog Timer (WDT) is an integral part of single chip microcomputer, which is of great significance in debugging and running of single chip microcomputer programs. Its main function is to reset the microcontroller by resetting the device (if the software does not reset the device) when a software failure occurs. It can also be used to switch the device from sleep or idle mode. The watchdog timer provides an independent protection system for the microcontroller. When the system fails, the watchdog will respond with a RESET signal after an optional timeout period. For example, x25045 can select three timeout periods: 1.4 seconds, 600 milliseconds and 200 milliseconds. When your program crashes, x25045 will reset the microcontroller. Most watch the ZW32-12 watchdog timer IC generate a single, limited output pulse duration when the watchdog times out. This is suitable for triggering a reset or interrupting a microprocessor, but some applications require latches that output (fault indicators). Considering the safety problem, the automotive electronic system needs a monitoring circuit to monitor the fault tolerance or safety. Watchdog timer can ideally meet this kind of demand. By detecting the periodic pulse generated by the microcontroller under normal working conditions, the failure state of the circuit or C can be detected, and once a fault occurs, it can be immediately switched to standby/redundant system wake-up. Operation of watchdog timer During normal operation, a WDT timeout overflow will generate a device reset. If the device is in the sleep state, a WDT timeout overflow will wake up the device and make it continue to operate normally (called WDT wake-up). Clearing the WDTE setting bit can permanently turn off WDT.
The post-divider allocation is completely controlled by software, that is, it can be changed at any time during program execution. To avoid unpredictable device reset, when the allocation of Timer0 prescaler is changed to that of WDT postdivider, the following instruction sequence must be executed. Even if WDT is prohibited, this instruction sequence should be executed.
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