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Problem with continious working of BLE Core

Metallizer
Associate II

‎2021-05-01 06:13 AM

Hello! At first I want to apologize for my bad english.

I faced with the following problem.

I have device with STM32L476 MC and STM32WB55CE. Input voltage around 4 V. This voltage go the the switching voltage regulator TPS63050RMWT. After switching on of device, bluetooth working is good. But after some time bluetooth is crashed. Although the main core work.

I tried to add extra capacitors but this one did not solve my problem.

I seted counter of radio activity event and increment this one in handler of radio activity event in app_ble.c and this counter was stoping on random number each other.

Maybe I was wrong in power supply schematic?

LVCC_OUT - input voltage for both boards.0693W00000AN4z4QAD.png P.S. R32 - 10k for uncharge capacitors after switching off

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Remi QUINTIN
ST Employee

‎2021-08-18 02:23 AM

The WD device require a VDD operating voltage supply between 1.71 V and 3.6 V max.

Can you insure this requirement is fulfilled?

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