Re: DS1307 on rpi4B

風來散人 <[email protected]>
Newsgroups gmane.os.freebsd.devel.arm
Message-ID <CAJzLSnyf0z=TOOaQyCuobfhhHT8F+px=VbqqEooiP+cs+BQ2Qw@mail.gmail.com> 
Hello.

I'm using this module (
https://www.electronicwings.com/sensors-modules/real-time-clock-rtc-ds1307-module)
and there are R2 and R3 for pull-up on the module. The registers are
connected to 5V. This probably harms RPI4B because the voltage is 3.3V at
RPI4B side. So I removed R2 and R3. That's why internal pull-up is required.

Best regards,
furaisanjin
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