About Aaron G

Aaron G · 2018-10-31

While developing a driver for the ST25RU3993, I have encountered a problem where the MISO line appears to stop working. I had previously been able to read out the version ID register, oscillator status, etc. but now everything reads back as zero. T...

Aaron G · 2018-05-02

Posted on May 02, 2018 at 14:29The STM32L071KZU6 is a fairly new part in a compact no-lead (UFQFPN32) package. I am trying to determine if a high-speed external oscillator can be used with this part (in bypass), but the documentation is inconsisten...

Aaron G · 2018-11-12

I figured this one out. It was an error in my code.In register 0x0D (MISC 1) I was inadvertently setting bit 3. This had the effect of making MISO open-drain, which of course kept it from sending anything other than zero since there is nothing on t...

Aaron G · 2018-05-02

Posted on May 02, 2018 at 15:21As another datapoint, the STM32CubeMX utility does not show HSE as an option in the clock configuration tab for the UFQFPN32 package while it does appear on the QFP100 package for the STM32L071xxx. This suggests that ...

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ST25RU3993 MOSI stops working?

Can STM32L071KZU6 use HSE oscillator?

Re: ST25RU3993 MOSI stops working?

Re: Can STM32L071KZU6 use HSE oscillator?