What kind of output does the External 32.768kHz Oscillator need to provide CMOS, PECL. LVDS?

does anyone know where I can get the schematic for ESP32 Board with 18650, even better the kicad files for it?


http://www.raspberrypiwiki.com/index.ph ... ery_Holder

I want to confirm that this would work with the module and not just the SoC. I can add my own VCTCXO Oscillator to the module via IO32 or IO33. I can only use a Oscillator with 32KHz? I thought I saw references where the Oscillator could be 40Khz.
viewtopic.php?t=2464

For the "RTC internal to the ESP32 has no battery backup option" I plan on having a rechargeable 18650 for any times that wall power is lost. So I am aware that if the esp32 looses power it looses time.

So this is great news so far, Are you saying it is possible to attache an external VCXO ...

It is my plan to use NTP or GPS to set the clock. I want to be able to keep very reliable time if NTP/GPS is not available for long periods of time. Which is why I am looking for clarification/advice on how to ensure time is kept accurate. I know that there are reliable real time clocks, but I do ...

I am looking to create a esp32 clock, but I want to add a ±1ppm VCTCXO Oscillator so that I can have it so that my esp32 clock can go a year and still be very accurate because of the external VCTCXO Oscillator. Has anyone tried this before? Is this possible?

I am designing a clock using the esp32. I am looking to attache an external Oscillator in order to increase the accuracy of the esp32's RTC.

I am not looking to use deep sleep at all. I am looking to have the ESP32 running a display at all times and taking readings in from a couple of sensors like ...