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KL81 tamper event cannot generate interrupt

Question asked by Dawei Yang on Jan 31, 2017
Latest reply on Feb 5, 2017 by Dawei Yang

Hi,

 

I have a hardware which has a tamper circuit loop. After I set up tamper pins, I trigger tamper event by switch on/off a physical switcher. When tamper event occurred, I can see DTF bit and tamper pin's TPF bit are both set.  I also set DTIE bit in IER register to enable interrupt when DTF sets. But tamper service routine,Tamper_IRQHandler, is not called. 

 

In the KL81 reference manual, it says "The DryIce Interrupt is asserted whenever a status flag and the corresponding interrupt enable bit are both set.". Obviously, it is not happening in my case. 

 

Can anyone give me any clues on this issue?

 

Thanks!

 

Dawei

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