Specifications

2.4. GPIO Located Near the Radio
Some GPIO have recommended usage. To maximize RF performance, these GPIO are only
available to use as low drive, low frequency I/O only. Wrong usage may lead to undesirable
performance. Here is the list of these GPIO:
3. Main Chip Solution
RF IC
Crystal Frequency
Nordic NRF52832
NRF52810, NRF52811
32MHZ
32MHz crystal is already inside the module.