Hi Abderrezak, On Thu, Mar 15, 2018 at 1:40 AM, Abderrezak Mekkaoui <[email protected]> wrote: > Hi All, > > I would appreciate any hints regarding the configuration settings that need > to be changed to use a synthesized LF clock (32.768 KHz) instead of the Xtal > Oscillator clock. > This is for a BLE application.
You'll need to set following settings: XTAL_32768: 0 XTAL_32768_SYNTH: 1 BLE_XTAL_SETTLE_TIME: 0 Depending on accuracy of your XTAL32M, you might also need to adjust clock accuracy: BLE_LL_OUR_SCA BLE_LL_MASTER_SCA This is just in case you experience unstable connections - just increase ppm using above settings. Allowed values are described in net/nimble/controller/syscfg.yml. With crystal mounted on nRF52840 you won't need to touch it. Note that using synthesized clock is not really recommended since it will keep HFXO running all the time and draw more power than with LFXO. > Thanks > > Abderrezak Best regards, Andrzej
