51822 power on time

RE: 51822 power on time

Kenneth — Thu, 04 Jul 2019 16:29:33 GMT

As long as you use that for both the bootloader and application yes.

Best regards,
Kenneth

RE: 51822 power on time

aatt05 — Thu, 04 Jul 2019 05:19:57 GMT

i am sorry. i do not know your mean. my boot code and app code use

#define NRF_CLOCK_LFCLKSRC {.source = NRF_CLOCK_LF_SRC_SYNTH, \

if use NRF_CLOCK_LF_SRC_RC , will time is less?

RE: 51822 power on time

Kenneth — Wed, 03 Jul 2019 13:05:08 GMT

The startup time of the external 32kHz crystal is typically several hundred ms, so I expect your measurements to be correct.

You may use the internal 32KHz RC oscillator instead by changing NRF_CLOCK_LFCLKSRC to:

#define NRF_CLOCK_LFCLKSRC      {.source        = NRF_CLOCK_LF_SRC_RC,            \
                                 .rc_ctiv       = 32,                                \
                                 .rc_temp_ctiv  = 1,                                \
                                 .xtal_accuracy = NRF_CLOCK_LF_XTAL_ACCURACY_250_PPM}