esp32-h2 gpio output voltage drops

[chris_h]

I've designed a board based on the ESP32-H2-MINI-1 module. The processor enters light sleep with a GPIO held high, and I'm noticing ~500mv drops for ~1ms which happen every few seconds. I'm guessing this is when the processor wakes up and is powering up the peripherals.

I tested the exact same code on a H2-DevKitM and the problem did not occur. I used the "Peripheral Schematic" form the ESP32-H2-MINI-1 datasheet as my design reference. (https://www.espressif.com/sites/default ... eet_en.pdf / Figure 7).

Is this just simply insufficient capacitance? There isn't anything missing from the datasheet reference schematic. If that is the issue, given that I've placed all of the capacitors from the reference, where/what should I be adding? Or is this actually an indication something else is wrong in the design?

Thanks,
Chris