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CC2642R: Changes the BOD level

Nona
Intellectual 1760 points

Part Number: CC2642R

Team,

My customer who employs the CC2642R would like to set the BOD threshold to 2.0V in order to detect the voltage drop as much as possible.
Is it possible to set the SET_CCFG_MODE_CONF_VDDS_BOD_LEVEL to 0x0(=VDDS BOD level is 2.0V)?
If so, are there any additional parameters should they change?

Regards,
Nonaka

  • 0
    Expert 2170 points

    Hi Nonaka,

    I do not think it is recommended to change the BOD level. Why not use the BATMON?

    Regards,
    Fredrik

  • 0
    TI__Guru**** 317180 points

    Hi,

    Could you elaborate a bit on the use case? Passing the BOD limit will give a system reset meaning that they will limit the valid supply range to the device.

  • 0 in reply to TER
    TI__Intellectual 1760 points

    Hi TER and Fredrik,

    My customer does not have a plan to use the CC2642 with VDD below 2.0V. In addition, does not like the VDD operating between the 1.8V and the BOD thresholds(1.7xV).

    BR, Nonaka

  • 0 in reply to Nona
    TI__Guru**** 317180 points

    The BOD limit is about 1.77 V. Does that mean they are worried about the range between 1.77 V and 1.80 V? The chips is designed to be safe to operate down to the BOD limit. 

  • 0 in reply to TER
    TI__Intellectual 1760 points

    Hi TER,

    Yes, they worry about that. It does not allow the operation at unspecified voltages (out of 1.80 - 3.63V ) from viewpoint of quality assurance of their products. Therefore to set the BOD level to 2.0V satisfies it.

    BR, Nonaka

  • 0 in reply to Nona
    TI__Guru**** 317180 points

    Since we are not able to trim the BOD voltage with absolute accuracy it's a gap between the BOD voltage and the minimum supply voltage. This is to avoid somebody getting a BOD when they use the minimum supply voltage. 

    But not sure what  they mean by " not allow the operation at unspecified voltages (out of 1.80 - 3.63V ) from viewpoint of quality assurance"? Since setting the BOD limit to 2.0 V will cause a reset if they go below 2.0 V.