(/wiki/File:Pico-RTC-DS3231007_(1).jpg)
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The LED light are not used by default, if you need to use it, you can solder a 0R resistor
on the R8 position. Click to view the schematic diagram (https://files.waveshare.com/upl
oad/0/08/Pico-RTC-DS3231_Sch.pdf).
The INT pin of DS3231 is not used by default. if you need to use it, you can solder the 0R
resistor on the R5,R6,R7 positions. Click to view the schematic diagram (https://files.wave
share.com/upload/0/08/Pico-RTC-DS3231_Sch.pdf).
Solder the R5 resistor, connect the INT pin to the GP3 pin of Pico, to detect the
output status of the DS3231 alarm clock.
Solder the R6 resistor, connect the INT pin to the 3V3_EN pin of Pico, to turn off
the Pico power when the DS3231 alarm clock outputs low level.
Solder the R7 resistor, connect the INT pin to the RUN pin of the Pico, to reset
Pico when DS3231 alarm clock outputs low level.
Resource
Document
Schematic (https://files.waveshare.com/upload/0/08/Pico-RTC-DS3231_Sch.pdf)
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