I want to understand the meaning of "standard drive, low frequency" GPIO pins. The datasheet mentions to use these pins for frequencies below 10 KHz. Does this limitation apply if I use SPIM on these pins? I tried running the SPIM at 8MHz and did not see any problem. Is it recommended to use only high frequency pins for SPIM?
The limitation is due to HF interference being injected into the RF radio. Do not use pins described as low frequency only as high frequency IOs (SPI).