Ah, choosing register and field names has never been your strongest suit, Espressif, right..

Thanks! This helps, I just need to "boost" it slightly, temporarily to meet the timing constraints, then put back to default.

Hi,

The official TRM keeps saying that RC_FAST_CLK (17.5 Mhz by default) is somehow adjustable. Now this is really not clear, what is adjustable there and how?

TRM Chapter 7.2.3:
"RC_FAST_CLK (17.5 MHz by default): internal fast RC oscillator clock with adjustable frequency"

It would be nice if ...