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David Ashman
Associate III
since ‎2018-07-20
‎2023-06-14

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  • 14 Posts
  • 1 Solutions
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User Activity

STM32F4 A/D Input Bias Current

2023-02-19
I'm not able to find a spec in the STM32F446 datasheet for minimum A/D input bias current. Does anyone know where I can find this info? I need to sample the voltage from a high resistance potentiometer and it would be handy to know if I need to buf...

HSE oscillator when using USB

2022-01-18
The STM32F303xB datasheet states that HSE oscillator should be used when using USB. I suspect it is because of the degraded accuracy of the HSI oscillator at temperature. I've had issues with CAN not working well with HSI at elevated temperature. Doe...

IBUSERR with emWIN on STM32F4?

2020-02-26
I need some advice on how to solve an issue with a forced hard fault IBUSERR when using ST provided emWIN freeware on a custom designed STM32F429BI based board. The STM32F429 is running HSI at 168MHz at 3.3v. As shown below, the forced hard fault I...

VOS (Regulator Voltage Output Scaling) bits correct on STM32F427?

2019-08-23
I am having issues with my STM32F427IIT6 Rev 3 running properly at temperatures higher than room ambient.  Clocks are set up for 168MHz with PLL from HSI source, no over-drive, and regulator is on.  I found that by setting the PWR->CR VOS bits = b01 ...

STM32F101 current draw in Stop mode

2016-09-21
Posted on September 21, 2016 at 17:42I discovered ~450uA additional current draw coming from the STM32F101 in Stop mode.  This condition occurs when an external pin interrupt from a peripheral goes active during Stop mode even though the NVIC is dis...
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