About Terry Greeniaus

Terry Greeniaus · 2024-06-30

I am trying to use the PLL1 fractional PLL on a Nucleo-U545RE-Q board to fine-tune a frequency measurement. RM0456 rev 5 has the following procedure to adjust the fractional PLL:"If the application intends to tune the PLLx frequency on-the-fly, then...

Terry Greeniaus · 2024-05-30

Hello,I was trying to implement extended calibration for ADC1 on my STM32U575 according to RM0456 Rev 5. I have a revision ID 0x3001 chip which should support extended calibration. The chip would hang very badly (can no longer connect with debug pr...

Terry Greeniaus · 2024-04-18

Hello,We are using the STM32C0 in a low-power application. We initially selected the part with 12K SRAM in case we needed to use more than 6K, but after development have found that we can make do with 6K. I am curious if there is any power savings ...

Terry Greeniaus · 2024-04-09

Hello,In STM32C0 RM0490, section 5.4.16, the RCC_AHBSMENR describes the bit SRAMSMEN which can be used to disable the SRAM clock during Sleep mode to save power. We will be using the STM32C0 in a low-power application and I was wondering if the SRAM...

Terry Greeniaus · 2023-02-09

Hello,I am using ADC1 on STM32U5 to sample two channels periodically using the DMA and a TIM6 trigger. I am doing this in bulb mode since I would like for the ADC capacitor to charge for the entire duration.I had thought that the ADC would sample th...

Terry Greeniaus · 2024-04-18

It is helpful to know that the extra RAM doesn't impact consumption.The STM32U0 would be ideal, however we are also space-constrained and need to use both the TSSOP-20 package and an HSE because we have to make some short but precise timing measureme...

Terry Greeniaus · 2024-02-22

Of all the pages on the ST website, the New Products page was the very best.Why on earth would you get rid of it?

Terry Greeniaus · 2023-02-10

I wrote too soon! Using discontinuous mode and bulb mode together seems to work, using DISCEN=1 and DISCNUM=0 (1 channel). Each trigger advances just to the next channel so the samples are all equidistant in time. Hopefully the bulb sampling is ac...

Terry Greeniaus · 2023-02-10

So, I tried with SMPTRIG mode instead of BULB mode and it does not seem to work at all if your sequence has more than one channel. I will open a tech support ticket to ask about that.My conclusion is that it might not be possible to sample more than...

Terry Greeniaus · 2023-02-10

I should add that I am using the offset register to subtract out 0x2000 and make the values signed; in my plotting tool I am adding the offset back in which is why all the ADC values are positive and not straddling the X-axis.

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STM32U5 FRACN not working

STM32U5 extended calibration procedure in RM0456 Rev 5 page 1269 is buggy

Power consumption of 6K vs. 12K SRAM in STM32C011F6 vs. STM32C031F6

On STM32C0, is SRAM preserved in Sleep mode if RCC_AHBSMENR.SRAMSMEN=0?

STM32U5 ADC1 bulb sampling multiple channels

Re: Power consumption of 6K vs. 12K SRAM in STM32C011F6 vs. STM32C031F6

Re: ST "New Products" page listing old products

Re: STM32U5 ADC1 bulb sampling multiple channels

Re: STM32U5 ADC1 bulb sampling multiple channels

Re: STM32U5 ADC1 bulb sampling multiple channels