About ebce3

ebce3 · 2020-10-20

Hello All,I have the following setup:Stand-alone STM32L4Q5CG on 48-pin breakout board with coupling caps installedPB11 tied to 3.3V via external 4.7K pull-up resistorPB9 tied to 3.3V via external 4.7K pull-up resistorSTM32CubeMx rev. 6.0.1 Firmware p...

ebce3 · 2020-10-28

Just got off the phone with ST technical support staff and was told that the particular MCU I am using (STM32L4Q5CGT6P) with the letter 'P' at the end of the part number has two switch mode power supply output pins on exactly the two pins I am having...

ebce3 · 2020-10-22

Thanks for the link. I realized after I posted my first reply that I had made an error - the BOOT0 pin actually WAS tied to GND via a 4.7K resistor. I did try removing it to see the effect on the pins in question, but found that the MCU does not rest...

ebce3 · 2020-10-21

Pin 44 (PH3-BOOT0) is not configured as anything and there is no resistor connected to it (floating). There is some UART handling logic running in the main loop, but it is mostly idle.

ebce3 · 2020-10-16

RZ, did you ever solve your problem? I have a very similar problem to yours (with 4.7K pull-up resistors, SDA remains unchanged at 1.22V instead of SCL) and your solution may apply to my problem, Thanks.

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Incorrect voltage on input pin of STM32L4Q5CG when pulled-up to supply voltage via external resistor

Re: Incorrect voltage on input pin of STM32L4Q5CG when pulled-up to supply voltage via external resistor

Re: Incorrect voltage on input pin of STM32L4Q5CG when pulled-up to supply voltage via external resistor

Re: Incorrect voltage on input pin of STM32L4Q5CG when pulled-up to supply voltage via external resistor

Re: I2C2 stuck in timeout on STM32L4S9