topic PCF2131FT OTP refresh in Other NXP Products

PCF2131FT OTP refresh

LiaoYF — Wed, 17 Aug 2022 03:36:52 GMT

Hello. We would like to know the OTP refresh mentioned in datasheet.

"It is recommended to process an OTP refresh once after the power is up and the oscillator is
operating stable. The OTP refresh takes less than 100 ms to complete. "

For end product, is this required each time the product power on or only needed once the first time our product power on?

What's the intention of this OTP refresh? to better maintain the content stored in EPROM?

Re: PCF2131FT OTP refresh

guoweisun — Wed, 17 Aug 2022 23:36:09 GMT

For a watch it is essential that the timing calibration can be made after the watch is fully
assembled. In this situation, the supply pads are often the only terminals which are still
accessible.

Re: PCF2131FT OTP refresh

LiaoYF — Thu, 18 Aug 2022 01:45:40 GMT

It seems the answer didn't answer the question regarding OTP refresh process.