STM32 MCUs Products

Hi everybody,I used a STM32F446 to communicate on NMEA2000 (CAN bus).The two pins (RX/TX) of my µc are connected to an isolator SI8621 (https://www.skyworksinc.com/-/media/Skyworks/SL/documents/public/data-sheets/si861x-2x-datasheet.pdf) and then, a can transceiver is connected MCP2542 (https://ww1.microchip.com/downloads/aemDocuments/documents/APID/ProductDocuments/DataSheets/MCP2542FD-MCP2542WFD-4WFD-Data-Sheet-DS20005514C.pdf)My board doesn't supply the NMEA2000 (the +12V is provided by T-bone of CAN bus - (I have a voltage regulator 12V to 5V on my board).When I supplied the NMEA2000, it works fine. But, NMEA2000 is an option, and by default nothing will be connected on the connector, so no there is no supply on the CAN bus transceiver, so the initialization of CAN bus doesn't work (timeout error).It's no use to put a pull-up resistor on RX or a end of line resistor because there is no voltage.For me the only solution that I see, is that the user (I've a screen) says if NMEA2000 is

Hello,  I have two channels on ADC1 and I want to trigger a s ample separately, every two seconds from first channel and every 10th second from second channel. I am using interrupts so after the adc trigger I get an interrupt when conversion is done. But it seems i only get a sample or read it from the first channel. I am new to stm32 microcontroller so i am not sure what can be wrong. I am configering everything and using an interrupt handler for reading the ready sample. I get the interrupt after each trigger but it seems i am getting the value from the first channel.  __HAL_RCC_VREF_CLK_ENABLE(); // enable the internal voltage reference hadc1.Instance = ADC1; hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1; hadc1.Init.Resolution = ADC_RESOLUTION_12B; hadc1.Init.GainCompensation = 0; hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE; hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV; hadc1.Init.LowPowerAutoWait = DISABLE; hadc1.Init.ContinuousConvMode = DISABLE; hadc1.Init.N

With a stm32c0116-dk, I am attempting to read vrefint, and calculate vref+. From my understanding of the data sheet, and schematic. VDDA is tied to VREF+ . On the development kit, these voltages are 3.3V.VREF+ = ((VREF _Charac+) * (VREFINT_CAL)) / VREFINT_DATAFrom the Datasheet - VREF _Charac+  = 3.0VWhen I calculated VREF+, after reading VREFINT_DATA from the ADC, and VREFINT_CAL from the memory address. I am expecting a result close to 3.3 volts, but instead I am getting 3.04VI have attempted to increase the sample time to ADC_SAMPLETIME_160CYCLES_5, but it makes no difference.What am I doing incorrect?

Hello Team,We are planning to use STM32H7S7L8H6 in our design. With this part we want to integrate quad SPI Flash memory (Part Number :  W25Q128JVPIM with 3.3V Vcc).So, in STM32H7S7L8H6 VDDXSPI supply voltage 3.3V is ok, right? Thanks & Regards,Jignesh Karena

Hello, do you know if we can transmit data formats of 32 bits via SPI in NUCLEO-L552ZE-Q. and if yes, how?  

Hello all,I am on the STM23 H750 discovery dev. kit working either in Keil or CubeZone IDE-just started, anyway, so far so good, and according to the logic analyser the LIN works, at least the checksum is right :) So far I am sending the frame once the button is pressed, made with switch and different states...  this only sends out the LIN frame once the button is pressed, is this normal, OK, or should the LIN frame be send once the button is pressed continuously every 3 or more seconds... For example, I am reading the bus from the other device, random, and it is sending out frame every few seconds, looks rather random... attaching a pic of analyser...Thank you in advance and I am looking forward!Best.

Hello,I have an issue and until now didn't find the solution :Using ADC2, one channel IN12, triggered by timer every 100µs, using circular DMA sized of 16 half-words, the array [0] value is always 0, the array's index used by DMA is from 1 to 16, not 0 to 15. See below screen shots : code : volatile uint16_t _v_Adc2Values [18]; // Define to 18 to see the shiftHAL_ADC_Start_DMA (&hadc2, (uint32_t *) _v_Adc2Values, 16);HAL_TIM_Base_Start_IT (&htim15);result :When I starts my software this morning to make the screen shots, the 1st start, I have not the issue, the values comes from 0 to 15 in array. Then I restarted my software several times, and all these tries the array result was shifted like the screen shot.Thank for your help.Best regards,Laurent      

Hello Team,With RDP set to Zero Level , Firmware upload succesfully using CubeProgrammer GUI ( USB DFU mode ).But If I set RDP LeveL 1 , Device not able to detect on PC device manager and not able to connect with STM32 using CubeProgrammer USB interface Option. It does not connect at all.Hence , Firmware update not possible with RDP 1 using USB DFU.After Setting RDP Level 1 to Zero using STlink V2 SWD interface , It works fine in USB DFU mode.Is it the correct behaviour ? Everytime do we need to set RDP Level 0 using STlink SWD and Then use USB DFU ?MCU is : STM32F303Rb

TL;DR: Two-node bus: STM32 (FDCAN1) ↔ CANable (SocketCAN) at 500 kbit/s candump can0 shows frames from STM32, but STM32 keeps flagging ACK error and increments TxErrorCnt. Scope on CANH/CANL (diff trace CH1–CH2) shows a dominant ACK bit in the ACK slot (!) External loopback works. Looks like my MCU isn’t “seeing” the ACK at its RX input—looking for eyes on transceiver mode pins, RX pin mapping/AF, and timing. Hardware MCU: STSpin32G4  Transceiver: SN65HVD230DR Other node: CANable / candleLight  on Linux as can0. Wiring: STM32 TXD/RXD ↔ CAN transceiver ↔ twisted pair to CANable. Termination: 120 Ω at each end (I can measure ~60 Ω between CANH–CANL with power off; will re-check if requested). Ground: Common GND between boards. If helpful, I have shared the schematic snippet for the transceiver pins . What works vs. what fails Works External loopback mode: frames “succeed.” candump sees frames from STM32 in normal mode. Scope on CANH/CA

Hi,I'm interfacing external ADC - 16 bit, 10MSPS (AD7626) with this microcontroller. STM32 SPI will work in slave mode, ADC will provide 80MHz clock. It will work in a burst mode - sampling 288 measurements x 16 bits at 5MHz.I can't decide whether I need BGA for this or LQFP will be sufficient. I remember having issues with internal ADC under performing when used in LQFP package. I don't want to go with BGA unless I have to.Cheers

The datasheet for STM32H573 (WLCSP80 package, rev 5 p. 251) says that the leftmost ball (in the bottom view on the datasheet) is F=0.384mm from the package edge. Horizontal ball pitch is 0.35mm*(1/2)*√3. Therefore centering the ball array horizontally would give F = 3.50/2 - 0.35*(9/4)*√3 = 0.386mm.This 2 micron difference has led to some discussion about whether the ball array should be horizontally centered within the package edges on PCB footprints. (Additional discussion arose from my initial misunderstanding of the datasheet. The datasheet could possibly be improved by measuring the margin to the top row rather than the second row. But now that I realize this, the question about horizontal centering still remains).Does ST have any insight about this 2 micron offset that might give a PCB designer confidence that it was truly intended? Can ST (or the ST community) give a recommendation about whether (or not) to update the KiCad libraries to include this 2 micron offset?

Hi,I’m working with the NUCLEO-H723ZG board and would like to know if it’s possible to use its two DAC outputs to generate a differential signal.Thank you very much

Hello again :)I have used all ideas including chat GPT. I can't see any changes in I2C line with oscilloscope. STM32G0B1KBU3N have Pin PB9 as SDA and PA9 as SLC. 3.3Volts pull up via 4.7 kOhm resistor. I am trying negotiate with LM51772 DC-DC buck-boost converter. No external clock crystal. I am sure the issue in the code but because lack op experience cant see where. Please support with the solution. Below is the code and the debug message. I am in desperate. Thank you.  set *(int *)0xE000EDFC=*(int *)0xE000EDFC|0x400 Temporary breakpoint 1, main () at ../Core/Src/main.c:82 82 HAL_Init(); /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2025 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be fou

Hi,I am searching for the external loader to flash the h750 discovery board. Can you please help me?Best regards,Andrew

Split from this thread.Hi there, switching to USART3 didn't work. I still don't see any messages in the serial console.   the second time I try to connect to the serial console gives this error.  

Hi, we are developing a device which outputs display port over type-c and needs to sink power. Similar to Laptops when connected to hubs. The required power is less than 60W. Im looking a for a suitable USB-PD implementation for this purpose. Can this be achieved using the USB PD peripheral in STM32s? If so, how?  Regards,Caner,Alp Lab

Hi all,After reading through both the HAL, low-layer and USB Device library code flow several times I am still confused about a peculiar point.When I ask STM32CubeIDE to generate a Custom HID base implementation, I get a "usbd_conf.c" file that has a function like this:USBD_StatusTypeDef USBD_LL_Init(USBD_HandleTypeDef *pdev) { /* Init USB Ip. */ /* Link the driver to the stack. */ hpcd_USB_FS.pData = pdev; pdev->pData = &hpcd_USB_FS; ... hpcd init ... ... callback registration ... /* USER CODE BEGIN EndPoint_Configuration */ HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x00 , PCD_SNG_BUF, 0x18); HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x80 , PCD_SNG_BUF, 0x58); /* USER CODE END EndPoint_Configuration */ /* USER CODE BEGIN EndPoint_Configuration_CUSTOM_HID */ HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , CUSTOM_HID_EPIN_ADDR , PCD_SNG_BUF, 0x98); HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , CUSTOM_HID_EPOUT_ADDR

I'm using a B-U585I-IOT02A board and the IOT_HTTP_WebServer example code. My read is the PSRAM is 8M on that board, but I can only access 16K (to 0x2803ffff) and then ???? is not IDE memory display or a trap in the code.  Is this a CPU configuration issue? 

Currently, on the STM32G474, I am able to perform on-the-fly flash operations and interrupt vector relocation using BF_MODE and VTOR. However, I have encountered an issue: when a function is placed in RAM using the ramfunc attribute or located in CCMRAM, how can I still achieve on-the-fly operation?

Hi All!I try to use 2 pieces of IS66WVO32M8 PSRAM with multiplexed OSPI ( only the NSS pins not shared ) with STM32F585 in memory mapped mode.Previously, I used 2 pieces of APMemory's APS12808L in memory mapped mode without any issues.I reconfigured all the necessary parameters to IS66... according the datasheets (AN5050, STM32F585 OSPI errata), and other's suggestions in the forum, like: https://community.st.com/t5/stm32-mcus-products/problem-with-psram-peripherals-of-stm32h735/m-p/706406#M257198or https://community.st.com/t5/stm32-mcus-products/problem-with-psram-peripherals-of-stm32h735/td-p/706406I can read the ID and configuration registers, I can also modify them (Yellow square), but when I write directly or indirectly to the memory area, and read back for verification, it causes an error.I tried to change the OSPI speed, using 55, 80, 100 MHz (with recalculated refresh rate using 4us tCEM:  220, 320, 400, 640), with- or without delay block, DHQC enabled/disab

hi ；During the operation of STM32H723VGT6, the constant input bus error and hardware error interrupt occurred, and the clock is 280M. The PWR_REGULATOR_VOLTAGE_SCALE1 is unstable. The clock configuration __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0) was modified. The result is stable. Could you please help confirm what the reason is

Hi Im Lalin, Im using STM32L433RC-P MCU for learning.Im facing the issue in reading the data from ADC.Im not getting any error too.Below are the source code attached.Kindly help me to find the solution for this.Note that im using uart.c for debugging purpose.Thanks in advance.

I am using the STM32H742 MCU.Currently, System CLOCK is set to 480 MHz and APB TIMER and AHB maximum CLK is set to 240 MHz.However, the maximum frequency of TIMER and GPIO cannot exceed 25 MHz, so what should I do to make it over 50 MHzAttached is the related code as well.  

Hi i'm using STM32F411RE. I've been reading data from ADC IC using I2C communication. It's 400Khz, and I'm reading using DMA. By the way, if another interrupt with high priority occurs during I2C communication, it runs that interrupt during I2C communication and reads I2C data again. If I operate with DMA, isn't it irrelevant to the interrupt because I2C operates on hardware? Of course, the data comes exactly. If you have any question, please ask me. Thank you.

Dear ST Support Team,I am currently working with Alliance Memory SPI-NAND Flash (part number:  AS5F38G04SND-08LIN]) and noticed that Alliance Memory lists process compatibility with only three STM32 families: STM32MP1, STM32H723/5xE/G, and STM32H742/3xI/G. Could you kindly clarify:1. Why is the compatibility stated only for these three STM32 families?2. From a hardware and peripheral perspective, what differentiates these families from others such as STM32F4xx, STM32F7xx, and STM32L4xx, which are not listed as compatible? Additionally, during our evaluation of the Serial Nand memory, we encountered an OIP (operation in progress) stuck at 1 issue while working with Stm32F4. With optimized drivers and command sequences, the device operates correctly, but we would like to better understand if there are known limitations or required peripheral features in certain STM32 families that may affect SPI-NAND behavior.Your insights on this would be very valuable for us in deciding