RE: nrf 52832 external board not flashing . SOC heating up. n52832 QFAA B/E0 1922Q0

Simonr — Wed, 22 Apr 2020 11:27:14 GMT

No, this should not be necessary Saurabh, it seems like this module includes the external LF crystal. Please double check your connections and make sure they are as in the picture below. As for the external chip getting hot, that does not sound good. Some temperature increase should be expected when it's running, but if it is scorching hot I think there's some trouble with the HW. Please check that the soldering on the board is done correctly.

Best regards,

Simon

RE: nrf 52832 external board not flashing . SOC heating up. n52832 QFAA B/E0 1922Q0

Saurabh_new — Tue, 21 Apr 2020 11:17:43 GMT

devzone.nordicsemi.com/.../RF_2D00_BM_2D00_ND04-Hardware-Datasheet-V1.2.pdf

above is hardware datasheet . let me know if i need to do the what was suggested by you?

SOC on external module is heating up.

Regards

Saurabh

RE: nrf 52832 external board not flashing . SOC heating up. n52832 QFAA B/E0 1922Q0

Simonr — Tue, 21 Apr 2020 10:48:54 GMT

It seems to me that the flash procedure is completed successfully. If you go up a bit in the nRFConnect log you should see the INFO Writing procedure starts for core0 and INFO Write procedure finished messages printed.

Your setup seems correct to me as well, so there should be no reason for the external board to not be flashed. A common mistake is that the external board does not include the optional external LF crystal. All our example projects are configured to use this clock, and you'll have to edit the following defines in the sdk_config.h file in order to make them run using the internal LFRC oscillator instead.

// <h> Clock - SoftDevice clock configuration

//==========================================================
// <o> NRF_SDH_CLOCK_LF_SRC  - SoftDevice clock source.
 
// <0=> NRF_CLOCK_LF_SRC_RC 
// <1=> NRF_CLOCK_LF_SRC_XTAL 
// <2=> NRF_CLOCK_LF_SRC_SYNTH 

#ifndef NRF_SDH_CLOCK_LF_SRC
#define NRF_SDH_CLOCK_LF_SRC 0
#endif

// <o> NRF_SDH_CLOCK_LF_RC_CTIV - SoftDevice calibration timer interval. 
#ifndef NRF_SDH_CLOCK_LF_RC_CTIV
#define NRF_SDH_CLOCK_LF_RC_CTIV 16
#endif

// <o> NRF_SDH_CLOCK_LF_RC_TEMP_CTIV - SoftDevice calibration timer interval under constant temperature. 
// <i> How often (in number of calibration intervals) the RC oscillator shall be calibrated
// <i>  if the temperature has not changed.

#ifndef NRF_SDH_CLOCK_LF_RC_TEMP_CTIV
#define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 2
#endif

// <o> NRF_SDH_CLOCK_LF_ACCURACY  - External clock accuracy used in the LL to compute timing.
 
// <0=> NRF_CLOCK_LF_ACCURACY_250_PPM 
// <1=> NRF_CLOCK_LF_ACCURACY_500_PPM 
// <2=> NRF_CLOCK_LF_ACCURACY_150_PPM 
// <3=> NRF_CLOCK_LF_ACCURACY_100_PPM 
// <4=> NRF_CLOCK_LF_ACCURACY_75_PPM 
// <5=> NRF_CLOCK_LF_ACCURACY_50_PPM 
// <6=> NRF_CLOCK_LF_ACCURACY_30_PPM 
// <7=> NRF_CLOCK_LF_ACCURACY_20_PPM 
// <8=> NRF_CLOCK_LF_ACCURACY_10_PPM 
// <9=> NRF_CLOCK_LF_ACCURACY_5_PPM 
// <10=> NRF_CLOCK_LF_ACCURACY_2_PPM 
// <11=> NRF_CLOCK_LF_ACCURACY_1_PPM 

#ifndef NRF_SDH_CLOCK_LF_ACCURACY
#define NRF_SDH_CLOCK_LF_ACCURACY 1
#endif

What SoC is it that is heating up? The nRF52832 chip on the DK or the SoC on your custom board?

Best regards,

Simon