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TM4C129XNCZAD: tamper event

mounika annapureddy
Prodigy 20 points
Part Number: TM4C129XNCZAD

Hi

I am using TM4C129XNCZAD microcontroller in my board. I configured tamper module to detect a tamper event. Hibernation module is connected to a battery supply. My doubt is if the board is connected to only battery supply will it be able to detect tamper event? If it detects can tamper event be logged without main supply to the microcontroller.

Thanks in Advance

  • 0
    TI__Guru**** 191886 points

    Hi,

    Please see below description about tamper event detection.

    mounika annapureddy said:
    My doubt is if the board is connected to only battery supply will it be able to detect tamper event?

    Yes, tamper event detection can work with only battery supply.

    7.3.6 Tamper
    The Tamper module provides a user with mechanisms to detect, respond to, and log system
    tampering events. The Tamper module is designed to be low power and operate either from a battery
    or the MCU I/O voltage supply. This module is a sub-module of the Hibernate module.

    mounika annapureddy said:
    If it detects can tamper event be logged without main supply to the microcontroller.

    Tamper Event Logging
    Up to four tamper events are stored in HIB Tamper Log n (HIBTPLOGn) registers within the
    Hibernate module. When a tamper event occurs the following status is logged:

  • 0
    Prodigy 20 points

    Hi,

    Thanks for the reply.

    I understand what was said. one more clarification is required for the below.

    If the tamper happens on only when battery supply is available ,as you said it will be stored in HIB Tamper Log n register.

    Now battery get drained off.Then Microcontroller is switched on Live supply will the status of tamper event will be still available in that register??

    Thanks

  • 0 in reply to mounika annapureddy
    TI__Guru**** 191886 points
    mounika annapureddy said:
    Now battery get drained off.Then Microcontroller is switched on Live supply will the status of tamper event will be still available in that register??

    Yes, the tamper feature as part of the Hibernate module is designed to be powered by either the battery or I/O power.