What are the non maskable interrupt I/Os are in STM32L431VCT6?. We plan to use External watchdog for our critical application.Output of WDT going to connected with NMI of STM32l431vct6.
The Reference Manual doesn't suggest such functionality
The internal watch dog does a Reset, that is "non-maskable", use the NRESET pin to achieve the same.
In case i use external watchdog timer, it has separate output for Watchdog reset and nReset. Where i have connect WDT output to controller's I/O?
You'll have to pick a GPIO and configure in EXTI functionality, but it will be maskable.
EXTI0 would have highest priority, pick one of PA0, PB0, PC0, etc.
I plan to use ESD diode on UART I/Os.My controller will run by 3.3v Source.If i choose ESD diode corresponding to my voltage levels, Clamping voltage is around 18v (8/20us). Will I/O support this volatge clamp for small duration?
Still don't know, absolute maximums don't have a duration parameter. I do not work for ST
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