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oscarw · 2024-04-18

I am using all of the pins of a STM32L471RE in a design.In manufacturing, there is the need to communicate with the MCU over UART (during Functional Testing (FCT)). The problem is that all the pins are taken, so there are no free UART ports available...

oscarw · 2023-11-15

I am using a STM32L471 MCU in a design that may be flashed with new firmware in situ. I'm using SWD as the interface, so the two unneeded JTAG pins (JTDI and JTDO) are used for other purposes. According to the reference manual, JTAG is activated by d...

oscarw · 2023-10-19

I'm trying to use the internal op-amps of an STM32L471 to amplify a small current-sense voltage before measuring it via ADC. This figure from the relevant product training resource shows an internal arrow labelled "ADC," coming from the op-amp output...

oscarw · 2024-04-21

Thank you for your detailed answer! I only have one question:You're assuming ~300ohm internal resistance of GPIOs due to their specified current limit. Is this a safe assumption to make? What if the current limit is based on limits other than voltage...

oscarw · 2023-10-22

Perfect. Not sure how I missed that, thanks to both of you for the info.

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Could UART function on lines with 10nF capacitance?

STM32L4 - Could state of JTDI pin affect switch-over to SWD?

STM32L4 - internal routing of opamp output to ADC

Re: Could UART function on lines with 10nF capacitance?

Re: STM32L4 - internal routing of opamp output to ADC