Hey Tom, CLKSEL is just tied high for now from the GPIO from the NRF with the plan to tie it directly to 3.3V in the future. The NRF outputs are attached below from the spec sheet, but I am observing about ~0.2V for OL and 3.3V for OH. For normal operation, START, /PWDN, CLKSEL, and /RESET are all pulled high. As I mentioned before I have followed the startup procedure detailed in the data sheet to appropriately toggle those pins differently during the startup phase.
↧
