AnsweredAssumed Answered

Vybrid tamper current and VBAT

Question asked by Juan Diaz on Oct 6, 2016
Latest reply on Oct 11, 2016 by Yuri Muhin

Hello,

 

I am using an external tamper and I set a pull-up resistor connected to VBAT. The tamper circuit is normally tied to ground, and if it is opened, the pull-up issues the tamper signal to VBAT voltage. The VBAT voltage is around 3V.

 

I mounted a 10k pull-up resistor, the tamper event is issued. However, when I mount a 100k pull-up resistor, the tamper event does not work. I would like to optimise the maximum resistor that makes the tamper work.

 

My question is which resistor fits the best to get a tamper trigger.

 

Regards,

 

Juan.

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