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SNNV
SNNV
Associate
October 23, 2019
Question

DS3231 RTC reset pin

  • October 23, 2019
  • 1 reply
  • 1368 views

We are using STM32F769 NI with DS3231 MZ+ rtc , the rtc is not holding time after a power reset .

The reset pin in the DS3231 circuit is floating , althouigh reset pin has an internal pull up of 50k , can i leave the reset pin floating or should i connect a pull up ?

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1 reply

Tesla DeLorean
Tesla DeLorean
Guru
October 23, 2019

Work together on this, it's not an ST part

https://community.st.com/s/question/0D50X0000BVpH0DSQV/stm32f7-interface-to-ds3231mz

>>can i leave the reset pin floating or should i connect a pull up ?

Couldn't you just add one to the circuit an check that off as an issue?

More likely you don't have the battery wired properly or there is some other issue with the circuit, chip or design

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