STM32 MCUs Products

Hello everyone,I am currently working on a project that requires a dual-core microcontroller with the following specifications:Flash Memory: 256 KB to 1 MBRAM: 16 KB to 64 KBArchitecture: 16-bit / 32-bit MCUsRTOS Support: YesClock Frequency: 48 MHz to 100 MHzCore: Dual coreOver The Air programming: YesI would greatly appreciate your suggestions on the best STM32 models that meet these criteria. If you have experience with any specific models, please share your insights regarding their performance, ease of use, and any potential drawbacks.

Hi everyone,I'm working on an STM32G070CBTx, and I need to execute two different functions depending on the GPIO mode of pin PA12.Specifically:If PA12 is configured as input (GPIO_MODE_INPUT), I want to run function1()If PA12 is configured as output push-pull (GPIO_MODE_OUTPUT_PP), I want to run function2()Is there a way in HAL or LL to check the current mode of PA12 at runtime?Or do I need to track the mode manually when I configure it?Any suggestions or best practices for this kind of conditional GPIO-mode-based logic would be appreciated!Thanks in advance!

I have an STM32F401 nucleo board and it used to work fine but now after a minute of connecting it with usb, the LD1 suddenly dims to very low light like pin on float. Before that it works fine, I can program it, debug it.

Hello, I am developing a electronic card that is supposed to be used in an automated test bench. I'm using an STM32G474 to control the card. I have already created one iteration of the card but I realised I made a mistake.I wanted to use the bootloader to program the card but realised far too late that I didn't install it properly and cannot use it. Plus I'm unable to debug with it.I now want to replace this system but I can't figure out what to use and how to route it.I think I could use STlink but I can't seem to figure out how it works and how to route it on the STM.Could anyone help me figure out this ?Thank you very much.

Hello everyone,I’ve integrated USBX configured as a Mass Storage Class (MSC) device into my project, which uses the STM32H743BITx MCU. The project compiles successfully, and the system detects when a USB device is connected. However, enumeration fails.I’m wondering if this issue could be related to the USB type or the clock configuration. I’ve read that many USB problems stem from clock accuracy.I’m currently using the internal clock source, specifically the 48 MHz HSI48 oscillator for USB. Is this oscillator accurate enough for USB operations, or is it preferable to use a PLL-generated 48 MHz clock? Unfortunately, I don’t have an external crystal available.When I try to configure the USB clock using a PLL (e.g., PLLQ) with HSI, I encounter the following error in CubeMX:“PLL Mux should have HSE as input”Also, I’m following t

The FDCAN module generates timestamps for sent and received messages, and you can configure it to use TIM3 as the source. Unfortunately, the documentation is rather thin, so I am left with a few questions:Do TIM3 and FDCAN need to run from the same clock or are they synchronized?What triggers the timestamp? I suspect this is the SOF bit, and it is sampled once every normal time quantum, so that the trigger resolution is one time quantumOne probably should not use the timer overflow flag in the CAN module when using TIM3, but check directly in the timer?Is there a recommended sequence to get FDCAN time quanta and TIM3 aligned, or should we just run TIM3 with a higher frequency?

Hi all,I am using a mass-produced PCB board for a project, the chip model is STM32F429BIT6. The PA1 pin is used as ADC1-IN1 for access to the sensor.However, I found a strange phenomenon that after configuring the ADC, the initial reading of the pin was a value such as 4092. But that's not to say that ADC doesn't work, because the number varies, sometimes it's 4089, sometimes it's 4091, it changes. Everything measured with this pin is 4092, but GND value is correct, almost single digits.I found the problem, but I don't know what's causing it. After measuring this pin with a multimeter, it is itself with 3.3v voltage, even if it is configured as `GPIO_MODE_ANALOG` in the code, changing `GPIO_InitStruct.Pull` to pull up or pull down, still does not work.At first I thought it was a problem with my code configuration, because I modified it based on someone else's code, but I used 'CubeMX' to create a n

 when creating new project, only 'Empty'.""This functionality works correctly in v1.18.""The issue appears after upgrading from 1.18 to 1.19, or when directly installing 1.19." 

Hi, I'm trying to initialize SDADC of my STM32F373CCT6 chip based on the Standard Peripherial Library. The program can be compiled with no errors but doesn't work after I uploaded it to the chip. I used a LED program to test it and found that the initializing function got stucked at the statement of waiting for calibration to complete. I used a self designed board. The intializing function and the main function of my program, as well as the schematic diagram of my board is attached. I'm a STM32 beginner and haved been troubled by this issue for days, I sincerely hope to get your help. Thank you so much!

Hello,I’m working on a telephone‑line–powered device based on the STM32L072VBT6 and I need to push the MCU’s Run‑mode current down to ≤ 1.2 mA (ideally lower) while on‑hook. So far I’ve managed to get down to 1.6–1.7 mA by applying the following:CPU clock reduced from 16 MHz → 4 MHz (MSI). Any lower crashes my SPI2 link to the AS2522 line driver.GPIO: all unused pins set to Analog / No Pull.Regulator: switched to Voltage Scale 3.RCC gating: disabled clocks for every unused peripheral.Delay/tick: moved from SysTick → LPTIM1 (LSO domain), and completely turned off SysTick.External gating: used an EXTI line to physically power‑gate off‑board modules when not needed.

Hi,I am using the STM32F407VET6 chip to simulate the SENT protocol. I have encountered some issues and would appreciate it if professionals in the forum could provide some answers.1.Since the SENT protocol signal needs to change the output waveform based on the transmitted data, I attempted to use the TIM BURST feature of the chip to simulate the SENT signal. I am configuring it using STM32CubeMX software. Below are the relevant configurations: 

Heyho,a few questions to those who already used the PTP offload function (not via IP / UDP, but PTP directly over ethernet, MAC packet type 0x88F7), which can auto-generate SYNC and DelayRequest messages:1) As this feature does not auto-generate FollowUp messages (so no "two-step" timestamp), I assume that the timestamp sent with the auto-generated SYNC message is the "exact timestamp" when the packet leaves the STM32's MAC, so that 2-step is absolutely not required ?2) And was this ever tested at STM? -->> examples...3) Why was no automatism created for Announce messages? (Okay, these are timing-wise not important)Using the HW would greatly reduce speed and code size, because LWIP would be completely unused for PTP, and my modified PTPd could be reduced greatly (much less "manual" packet processing)Anyway, one more request for example source code!

 Hello,I'm working with the STM32H723 and need to interface with an external ADC that provides a DRDY (PG2 pin) signal. I'd like to initiate an SPI transfer via DMA whenever the DRDY pin goes low. The ADC is connected to SPI6, and I understand that only BDMA can be used with this peripheral.My main question is:How can I configure DMAMUX to trigger a BDMA transfer for SPI6 when the DRDY pin goes low?I'm using STM32CubeMX for configuration. I’ve looked through existing forum posts and the STM documentation, but haven’t found a clear example or explanation for this setup. Any guidance, examples, or tips to get started would be greatly appreciated.Thanks in advance!

I have the following clock tree for STM32L471I am using TIM2 as trigger for DAC, ADC1, and ADC2 at 2.4MHz. Clock frequency of TIM2 is 48MHz with a counter value of 19 and prescaler = 0.With oscilloscope, I confirmed that the DAC is generating the signal at 2.4MHz sampling frequency.The ADC1 and ADC2 are running in dual mode with single DMA channel. The following is the ADC configuration/* USER CODE BEGIN Header */ /** ****************************************************************************** * @file adc.c * @brief This file provides code for the configuration * of the ADC instances.

I am designing a system with an STM32 and an FPGA(Xilinx 7 series).STM32 is in charge of the user interface and the FPGA is in charge of driving the LCD to show images.Information needs to be exchanged between the STM32 and the FPGA. (STM32 send a command to the FPGA to choose which image to display or to stop displaying. STM32 also need to write all logs to the SD card through the FPGA. FPGA needs to report to the STM32 how many images are displayed and how many remain.)After some research, I found SPI seems to be fast and easy to implement.(I am not sure which interface is commonly used for communication between STM32 and FPGA?). I wonder if there is another interface that is faster or easier to implement?

Hi STM Team,  We are planning to use STM32G491 MCU in our application. As per datasheet, it is mentioned that STM32G491 MCU will support USB PD 3.0. We have come across the below STM document where it is mentioned that "STM32 UCPD MCUs are compliant with the latest USB PD r3.1 specifications" and EPR support is there. Could you please confirm, whether STM32G491 MCU supports USB PD 3.1 and Extended Power Range Support(upto 240W). Warm Regards,Mythili B 

 Tests Performed and Results:1.A DC regulated power supply was used to provide 14V to the board directly. At room temperature, the CPU's TIM pin output is normal. However, at high temperatures, the output waveform becomes intermittent.2.The on-board 3.3V and 5V power supplies remain stable and within specification at all times.3.The external crystal oscillator connected to the microcontroller maintains a stable waveform under all temperature conditions.4.The same issue occurs even after replacing the CPU with one from a previous production batch: the TIM pin output is normal at room temperature but becomes intermittent at high temperatures.5.This TIM pin is used to simulate a frequency signal. When the output becomes intermittent, the total output duration becomes longer. The firmware uses a pulse count to determine when to stop the output, so it appears the missing pulses (due to missed interrupts) cause the output to last longer than e

Hello,I'm using a specific board where the STM32 cohabit with another "master" device on the parralel bus.One time the STM32 is the master and "drive" the external RAM and one time the other device "drive" this RAM.My first thought was to disable the FMC and put all pins in disable (input ?) mode when the STM32 is not the master.And when the STM32 become the master again, put th GPIO back in alternate mode and re enable the FMC.Something like this to disable the FMC:__FMC_DISABLE(); LL_GPIO_SetPinMode(GPIO_FMC_A0_Port,GPIO_FMC_A0_Pin,LL_GPIO_MODE_INPUT); LL_GPIO_SetPinMode(GPIO_FMC_A1_Port,GPIO_FMC_A1_Pin,LL_GPIO_MODE_INPUT); ..... And to reenable it, something like :LL_GPIO_SetPinMode(GPIO_FMC_A0_Port,GPIO_FMC_A0_Pin,LL_GPIO_MODE_ALTERNATE); LL_GPIO_SetPinMode(GPIO_FMC_A1_Port,GPIO_FMC_A1_Pin,LL_GPIO_MODE_ALTERNATE); ....

Hi allI am working with SPI1 on stm32f407vgtx and issue what I am, facing my NSS which internally controlled by SPI is taking more time for goes high even CLOCk has been stopped . my configuration are SPI full duplex 16 bit data clock is 2.6MHZ after prescaled I am transmitting on spi every 10ms task. Please check the screenshot of logic analyzer for further understanding .Note: in the end I have disabled SPE bit  before checking TXE and busy flags.  

 I’m using the STM32L443 in one of my products, and currently, there are around 2,500 units deployed in the field. I’ve been experiencing issues that I believe are related to the firmware programming process during production. The product includes a seven-segment LCD. After programming the firmware and running tests, I noticed that some characters do not display correctly in certain menu screens. I’m confident this is not a hardware issue. Interestingly, when I reflash the firmware on the same board, everything starts working properly — the display shows the correct characters. These are just the visible symptoms. I’ve also observed cases where the firmware seems to get stuck in a specific scenario. For example, there’s a routine that runs every 5 minutes. On the third iteration, the system hangs. Even after a power cycle, it always gets stuck at the same point. However, if I reflash the firmware, the issue disappears. 

I'm trying to understand the operation of the STM32F446xx family of microcontrollers. I'm reading the reference manual that's available here: https://www.st.com/resource/en/reference_manual/rm0390-stm32f446xx-advanced-armbased-32bit-mcus-stmicroelectronics.pdf. I'm struggling to understand the timing of how the FMC SDRAM controller reads the data it anticipates and stores them in the FIFO. I have the following questions: 1. On page 313, in the description of the RPIPE bits, it is stated, "These bits define the delay, in KCK_FMC clock cycles, for reading data after CAS latency." Which clock does KCK_FMC refer to? And how are KCK_FMC and SDCLK related? I couldn't find KCK_FMC mentioned anywhere else in the manual. 2. On page 306, it is stated, "The FMC SDRAM controller f

Hi everyone,I'm working with an STM32U5 and using USBX with the CDC-ACM class.My setup is as follows:I have a USBX CDC ACM receive thread that calls usbx_cdc_acm_read_thread_entry() in ux_device_cdc_acm.c file.Alongside, I have a state machine running in another context (main loop).If the device stays idle (no USB activity) for a certain timeout, the state machine puts the MCU into Sleep Mode using:HAL_SuspendTick();HAL_PWR_EnterSLEEPMode(PWR_LOWPOWERREGULATOR_ON, PWR_SLEEPENTRY_WFI);HAL_ResumeTick();The goal is to wake up the MCU only when data is received on the USB.To achieve this, I tried relying on USB interrupts:OTG_FS_IRQn is enabled in NVIC.The USB OTG FS peripheral is initialized properly via HAL_PCD_Init().OTG_FS_IRQHandler() is defined and calls HAL_PCD_IRQHandler()

Hi, I'm searching for more details on  STM32F303 ADC Voltage Regulator Function ADVREG. According AN4195 it needs to be enabled before ADC calibration. ADC Regulator is by default disabled. But i cannot see any big difference on ADC conversion results bettween enabled and default (disabled) state of the regulator. I'm using recommended ADVREG enable sequence 10 -> 00 > 01. Thanks!

... leads to "funny" results:STM32L011 with 16 kB of flash, HAL inits and LED toggle in main, DEBUG, no optimization:93% of flash usedI had not expected it to be that bad! :grinning_face_with_sweat:Okay, I will probably not use too much HAL, will use Release version with optimization,but I better select an L01 in the next bigger QFN package (4x4) to get 32 kB of flash.

Hello.First of all, thank you for your help.I have a question about UART & debug.When I stop transmitting from the PC while communicating with the PC and then debug, there is no problem.When I stop debugging and resume while transmitting from the PC, the communication fails. When I check the UART related register, it remains in busy state.This problem was previously fixed using stm32cubeide 1.9.0 or 1.17.0, but it has been fixed after changing to 1.19.0. Is there a problem with the installation? Where should I set to solve this problem?Additionally, I opened and checked the old project, and there is no problem with the old project. The IC used to be mainly stm32f103, and this is the first time I am using stm32h743. Is there a problem with the chip parameter settings?