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Smart Bluetooth Forum Discussions

Anonymous
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can anyone tell me what is the significance(exactly) of warm up workaround video.

I think it is the time required for the tag to get started

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MichaelF_56
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My understanding is that there were SIP modules that shipped which used an oscillator (internal) with less than optimal tolerance and this caused some issues with the part coming out of sleep. Disabling sleep was one method to verify the oscillator was the issue. In addition, you can increase the crystal warm up time to 5,000 in the .CGS file.

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MichaelF_56
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My understanding is that there were SIP modules that shipped which used an oscillator (internal) with less than optimal tolerance and this caused some issues with the part coming out of sleep. Disabling sleep was one method to verify the oscillator was the issue. In addition, you can increase the crystal warm up time to 5,000 in the .CGS file.

Anonymous
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Hi, mwf,

Does this issue affect 20736/7 SOC?

thanks.

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ShawnA_01
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SOC designs do not have this issue, only the SIP (modules).

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MichaelF_56
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Correct.

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Anonymous
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thanks a lot for the double confirmation:-)

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WaSu_1697556
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When you mention sleep, is it deep sleep?

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MichaelF_56
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Sleep.

The xtal will start running 'xtal warmup' uS before the firmware wakes up.

Increasing xtal warmup reduces sleep time, but the effect on average current depends on how large the sleep time is compared to increase in xtal warmup (current during warm up is about 1/6th of current when chip is active
without RF).

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WaSu_1697556
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I see, thanks!!

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