CC2540 battery level monitoring

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Posted by Martin Holden

on Aug 20 2012 08:46 AM

Hi All,

I'm looking a the CC2540 datasheet and user guide for the CC2540 and note that the operating voltage range is 2 - 3.3V, where as on page 148 of the user guide in the BATTMON register the lowest voltage you can detect on AVDD5 is 1.93V.

So my question is; Is this usable, can it detect down to 1.93V and if so is it capable of transmitting that data?

I'm not in a position to empirically test this myself at the moment and would really appreciate any input.

Thanks

All Replies

Posted by BugKing

on Aug 20 2012 12:39 PM

Verified Answer

Verified by Chatto

Prodigy590 points

Hi Martin Holden,

The BATTMON is only on the CC2533 (see page 145 of users guide). To monitor battery voltage on the CC2540 then one must use the ADC (see page 137 of users guide). In general the CC2540 is specified, designed and tested to work down to 2V. 1.93V is very close to 2V and you may find that most parts work fine at that supply but since TI does not test at that supply level it is not recommended and would be at the user's risk.

Regards,

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