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FAQ
If the watchdog (WDT) function is enabled in the config bit, will it affect ISP upgrade procedure? Issue Date：2016-06-02
If the watchdog (WDT) function is enabled in the config bit, the watchdog will start automatically. The default clock source is internal low speed 10 kHz clock. Reset Time = Overflow Time + Delay Time
= (2 ^ 18 + 1026) /10k=26.3 seconds.
The Nuvoton ISP Boot Loader program did not include the watchdog function. If the watchdog (WDT) function is enabled in the config bit and the ISP upgrade time is more than 26.3 seconds, there will be a watchdog reset, and ISP upgrade will fail.
Therefore, if the user needs to enable the watchdog (WDT) function in the config bit when using the Nuvoton ISP Boot Loader, please be sure to add the watchdog reset function to the ISP Boot Loader; otherwise, when the ISP operation time is more than 26.3 seconds, because the upgrade time is too long, more than a watchdog reset time, it will cause chip reset and ISP upgrade failed.
| Products: | Microcontrollers ,Arm Cortex-M0 MCUs ,M051 Base Series ,M0518 Series ,M0519 Series ,Nano100/102 Base Series ,Nano110/112 LCD Series ,Nano120 USB Series ,Nano130 Advanced Series ,NUC029 Series ,NUC100/200 Advanced Series ,NUC120/122/123/220 USB Series ,NUC130/230 CAN Series ,NUC131/NUC1311 CAN Series ,NUC140/240 Connectivity Series ,Arm Cortex-M4 MCUs ,M451 Base Series ,M451M Series ,M452 USB Series ,M453 CAN Series ,NUC442/472 Series ,NUC505 Series |
|---|---|
| Applications: | |
| Function: | Peripherals,Timer and PWM,Watchdog Timer (WDT),Software and Tools,Nu Tools,In System Programming (ISP) Tool |