STM32 MCUs Products

STM32L031, VREFINT error depending on prior channel voltage.

I am using a STM32L031 on a Nucleo board to sample analog inputs and VREFINT. When I sample the VREFINT voltage after another channel I observe some error that changes depending on the voltage on that previous channel. I assuming that charge is being...

Need help to solve a problem with SPI bus of the NUCLEO144-H743Z2

Hello,I have a problem with the SPI protocol (NUCLEO144-STM32H743Z2 board) in a very specific case.The MCU first sends a byte array as a command to the device on the PIS bus, this device interprets the sequence and, depending on the content of the co...

Creating two task with one as realtime and second as idle priority, but as both task execute for say n minutes, program counter does not come into the task again, even you have a infinite for loop in both task.

MCU upgraded from STM32F103 to STM32L475. Facing issue in ADC part. In the F103 MCU ADC clock derived from HCLK and to meet the same sampling time we used ADC clock PLLSAI1 in L475.

The issue is that at the normal conditions we are able to read the ADC values properly and when we put our device in the field then we are facing noise issues in ADC values. When we put old MCU no noise issue is coming but when we put new MCU then no...

There is an error when i debug my code in the stm23CubeIDE.

When I go to debug, there is an error saying some source file isnt found (__lib_init) or something like this. I dont remember the name exactly. Then it gives me an option to go to preferences. Also, the debug doesnt run properly, my peripheral regist...

STM32L4R9 fails execution by going to an invalid address for program execution.

I am using an STM32L4R9ZIT. I have written a simple code to toggle a GPIO high and low, with a delay of 2 seconds in between. However, the controller never actually executes this functionality. When I run in debug mode, everything seems to be going a...

RM0091 - is FLASH prefetch after reset on or off?

In RM0091, rev.9, 3.5.1 Flash access control register (FLASH_ACR):Reset value: 0x0000 0000[...]Bit 4 PRFTBE: Prefetch buffer enable 0: Prefetch is disabledIn RM0091, rev.9, Prefetch controller  within 3.2.1:After reset, the state of the prefetch buff...