RTC DS3231 pull-up resistor on SQW line

Customer:

I purchased 2x RTC DS3231 modules. I’m curious about the schematic of the module itself, as I notice a pull-up resistor on the SQW line.

Original message (Croatian)

od vas sam kupio 2x RTC REALTIMECLOCK DS3231. Zanima me shema od samog modula, jer primječujem pull-up otpornik na SQW liniji.

Hvala,

[name removed]

Originally submitted via email support on 27 April 2017. Migrated to the forum for community visibility.

Soldered Support:

You can find the reason for the pull-up on SQW on page 9 of the datasheet (Soldered: Open-Source Electronics, Boards, Sensors & Modules – Soldered Electronics). Unfortunately we don’t have a schematic available, as the module is not open-hardware. There are plenty of examples online, and Maxim provides an example in the datasheet. If you need help with design, feel free to reach out.

Original message (Croatian)

na stranici 9 datasheeta ( Soldered: Open-Source Electronics, Boards, Sensors & Modules – Soldered Electronics ) možete pronaći zašto pull-up na SQW.
Nažalost shemu nemamo, modul nije open-hardware. Na netu ima dosta primjera, Maxim daje primjer u datasheetu. Ukoliko trebat pomoć oko dizajna slobodno se javite.