STM32WB5MMG with Full BLE stack / Power Consumption
Hi All,
I'm currently using an STM32WB5MMG on my project and I'm struggling to reach the expected power consumption.
Please note one known error on the PCB: the RF_OUT and ANT_IN pins, which should be connected to GND according to the datasheet/guidelines, were inadvertently left unconnected. These pins are currently inaccessible for rework.
Anyway, I'm trying with all the examples available for this MCU, and I have read all the conversations about this MCU and the Low Power modes multiple times with no success.
I have tested the PCB with the HeartRateFreeRTOS example and with the PWR_STOP2_RTC example, but again, no luck.
The current is always around 500 μA.
I have already tried to desolder all the sensors from the PCB to be sure that the extra consumption doesn't come from one of them, but no luck.
I have also deactivated all debug functionality while testing for power consumption, and I have tested the PCB with the debugger disconnected, so it is not related to this.
I also tried to initialize all the GPIO as ANALOG input as suggested in some posts (in PWR_STOP2_RTC, it was already done, so this is not the problem)
My First question is:" Could the missing connection to GND of RF_OUT and ANT_IN cause the extra consumption ?" I have no way to test this because those pins are not reachable to try to do a rework.
Second question: If this is not the issue, is there any known problem that could lead to this anomalous consumption?
Thanks
Jonny