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The user authentication service is under maintenance on September 17 at 6:00 a.m. CET for approximately 30 minutes. During this period, disruptions can occur. The impact is limited to versions earlier than STM32CubeMX V6.16.0 and STM32CubeIDE V2.0.0. The service returns to normal soon after maintenance is complete.What to do if a problem occursIf issues occur during the maintenance window, use st.com or try again after 30 minutes. If the problem persists after that time, contact ST through the Community for further assistance. Update September 17, 2026:The maintenance was successfully completed as scheduled on September 17.If you encounter any issues, please do not hesitate to contact us.

The user authentication service is under maintenance on September 17 at 6:00 a.m. CET for approximately 30 minutes. During this period, disruptions can occur. The impact is limited to versions earlier than STM32CubeMX V6.16.0 and STM32CubeIDE V2.0.0. The service returns to normal soon after maintenance is complete.What to do if a problem occursIf issues occur during the maintenance window, use st.com or try again after 30 minutes. If the problem persists after that time, contact ST through the Community for further assistance. Update September 17, 2026:The maintenance was successfully completed as scheduled on September 17.If you encounter any issues, please do not hesitate to contact us.

Hi,Is there any stabilization or warm-up time needed by STM8S controller when interfaced with ADC for calibration?Usually for ADCs there is a warm-up time, so wanted to know if this MCU also has a warm-up time.

Hello, I was wondering where can I find the Pick n place file to create the dev board. on the official site there is the BOM and the gerber files, but without the pick N place I can’t actually assemble it.Thanks for the helpRoman

Hi,I am using STM32G431CBU6 with HSI16 as the only clock source (no external crystal on the board), and I need to budget the resulting frequency error. I have a few questions about DS12589 Rev 2 (October 2019), Table 44 "HSI16 oscillator characteristics", page 107, and Figure 23 on the same page.Q1 (main question) — Are fHSI16 and Δtemp(HSI16) additive, or is Δtemp inclusive?Table 44 lists two separate parameters:Symbol Conditions Min Max fHSI16 VDD = 3.0 V, TA = 30 °C 15.88 MHz 16.08 MHz Δtemp(HSI16) TA = 0 to 85 °C −1 % +1 % For a single device over the 0 to 85 °C range, is the worst-case total frequency error:(a) −7500 ppm − 10000 ppm = −17500 ppm … +5000 ppm + 10000 ppm = +15000 ppm (i.e. the two parameters add), or (b) ±10000 ppm (i.e. Δtemp already includes the initial tolerance at 30 °C)?This makes a large practical difference for bit-timing budgets, so I would like to be sure.Q2 — Is a typical temperature coefficient (ppm/°C) available?Figure 23 shows mean/

Greetings,I am not quite a USB, or USBX, expert, but I do have a question.I have a custom HW design utilizing the H573, and the USB FS port, which according to the datasheetsupports a max of 8 configurable endpoints.We have a USB Hub chip integrated into the HW design, and hoped to support 4 USB devices behindthe hub. Assuming that each device is a 2.0 USB Flash Drive (Sandisk, or whatever vendor),and each USB Flash drive consumes 3 endpoints (control, IN and OUT), this is twelve endpoints just forthe flash drives.The number 8 (endpoints), is fixed in STM32H5 hardware? Am I correct in saying that the four flash drive application will never work? ThanksKen

I am trying to use a STM32G0B1CBT3 for standard (non-FD CAN communication).The device is running from a 8 MHz HSE oscillator.This is the clock topology I am using: As you see the CCS is disabled and the CAN clock and the system clock is running on 64 MHz.In some cases my CAN frames are transmitted with a bitrate faster than expected:The edges some times falling totally to the sampling points, the calculated bit times are lower than 4 us: Putting the correct and incorrect frames the difference is more visible: I have tried to route the HSE to the MCO to see how stable is it, but I have not detected any deviation which could cause this deviation.I also tried to run an overnight test to send a CAN frame continuously and capture the waveform and calculate back the bit times are quite identical: Any hints, ideas would be welcome!

Hello,I have a Nucleo-L432KC with a dead microcontroller, but the STLink IC is ok.I wanted to use the STM32F103 to develop some USB code, so I removed the broken L432 and populated the reprogramming header for the SWD, CN2.I connected there a STLINK-MINIE to erase it, but CubeIDEProgrammer cannot read back anything.At the first connection I was able to erase it (maybe just partially?), because now it is not recognized anymore as ST_Link device and the LED has only a faint red color.I also connected the reset to the STLINK-MINIE and tied the BOOT0 to 3.3V.Is there anything else I can try to fully erase and then re-program the F103? Thanks,Marco  

i have enabled FATFS via CubeMX like belowbut for some reason in the code generation settings I can’t disableI want disable it because CubeMX generates a void function; instead, I want the MX_FATFS_Init return a status code if it is generated or not so, I want to have a uint8_t MX_FATFS_Init() 

Hello there, I’m working on a device that in its normal operation uses the MSC.But I want my clients to also be able to update the device via USB using DFU.#define USBD_PID_FS     57105#define USBD_PRODUCT_STRING_FS     "STM32 DownLoad Firmware Update"#define USBD_CONFIGURATION_STRING_FS     "DFU Config"#define USBD_INTERFACE_STRING_FS     "DFU Interface"#define USBD_PID_FS     22314#define USBD_PRODUCT_STRING_FS     "STM32 Mass Storage"#define USBD_CONFIGURATION_STRING_FS     "MSC Config"#define USBD_INTERFACE_STRING_FS     "MSC Interface"I found these differences and made a work around, CubeProgrammer is detecting a DFU device when a button is pressed:void MX_USB_DEVICE_Init(void){ /* USER CODE BEGIN USB_DEVICE_Init_PreTreatment */ //check to enter DFU mode if(HAL_GPIO_ReadPin(USR_BUT_ENTER_GPIO_Port, USR_BUT_ENTER_Pin) == GPIO_PIN_RESET){ if (USBD_Init(&hUsbDeviceFS, &DFU_Desc, DEVICE_FS) != USBD_OK) { Error_Handler(); } if (USBD_RegisterClass(&hUsbDeviceFS, &U

I have a LSM6DSV16X IMU powered from a 3.3V LDO. It communicates with a TMS320F2800137 MCU via SPI which is powered from a separate 3.3V buck rail. Power to the MCU and rest of system is controlled via the shutdown of the 3.3V buck. An interrupt from the IMU can control the shutdown of this 3.3V buck to wake it back up again. My first issue arose when powering down the MCU system that 3.3 V from the IMU would back feed from the CS pin 12 through the GPIO of the MCU and draw excessive current as seen as a 0.6V drop across the 3.3V buck rail. Current measurements showed 700uA from the 14.4 V supply. To fix this backfeeding voltage I turned off the I2C/I3C interface via the IF_CFG register, however, this leads to the next issue.With the IMU programmed with the accelerometer in LPM1 with ODR 1.875 Hz and gyroscope in sleep mode; no other embedded functions enabled, I disable power to the 3.3V buck, leaving only the IMU and 3.3V LDO powered to find the IMU consuming about 250uA for about 10

I’m trying to use ADC oversampling and noticed that temperature value is distorted in that case.I have configured ADC with 7 external inputs, temperature sensor input and Vref input. Vcc/Vcca is 3.27V, sampling time is 7.5 cycles.When oversampling is disabled - I’ve got averaged raw value 2115 for analog input (voltage 1.64V), 1005 for temperature sensor and 1582 for Vref. When oversampling is enabled (no matter 2x or 16x, with shifting to same count of bits as added by oversampling) - I’ve got 2115 for analog input, 1107 (!!) for temperature sensor and 1584 for Vref. So, only temperature sensor input value differs. And, as result, I’ve got 63*C instead of 33*C when oversampling is enabled.What’s wrong with oversampling? Can it be fixed by some kind of settings? Or I must forget about it and use software oversampling instead?I’m using latest CubeIDE 2.2.0 and CubeMX 6.18.1 with latest libs 1.6.3.

Hi, guys.  (admin, if this post is inappropriate please delete)So I am doing quite a complicated project (well for my skill level anyway) and my own code is stating to confuse me. Are there any guidelines for writing readable code in embedded development?  I attached my whole project link below. my project on github  Any tips would be helpful. I am no where near done and the amount of code I have to write is orders of magnitude away from being finished. I am using cube IDE for this project. A while ago I did try and transition over to vscode but I was getting a lot of issues with cmake and might have become allergic to it. I have also changed how cube ide looks a bit. below is an screenshot.  tldrtips on orginising code so its easyer for me to follow my own stuff  if you have any tips on making cubeide look better? attached link to my github project below.   

We would like to use the VL53L5 to measure the fuel level in a tank. According to the ATEX standard, the measuring device with the VL53L5 will be located near an opening in the tank in Zone 0.The datasheet does not specify the optical power of the circuit. The ATEX standard specifiesthe maximum optical power that the device may have in order to be installed in Zone 0. Could you please provide a table with the optical power values?

I am using STM32H745, STM32CubeAI Studio 1.3.0, ST Edge AI Core v4.0.1, as recommended on STM web site I am moving my code from X-CUBE-AI (generated by CubeMX) to ST Edge AI v4 (generated by AI Studio).I need to extract output of intermediate layer, and I used to use platform observer API for that.Can I keep using with st-ai code base (ai_platform_observer_register)?Should I switch to stai_network_set_callback() ? Is it supported for production applications? Will this API remain available in future ST Edge AI Core versions?Thank you

Hi all,I have this demo board. I copied the BSP demo code to my own empty project to understand and learn how the LCD code works. I copied the code from the BSP demo function by function but I moved the code to my files (filenames and project tree folders) so it makes more sense to me. I'm at the point where the demo draws rectangles on the screen and the demo runs. I copied the touch panel stuff but it is disabled because it was getting stuck in the init function. I'll deal with the touch panel later.I can not get the function that draws the rectangles on the LCD to work more than once when I program the board with my project. If I try to debug and step thru the code it actually works. I traced the part where it "hangs" by adding a line to toggle the green LED in the board. The part where it hangs is in the Polling For DMA transfer function: (void)HAL_DMA2D_PollForTransfer(&hlcd_dma2d, 50);BTW I'm new to STM32U5G9J, never used it before. I read the reference manual for the MCU and

Software version: STM32CubeMX2 1.1.1 Target MCU: STM32C542RCT6Steps I followed:Created a new project and generated the CMake‑based IDE project to a target folder. Closed CubeMX2, then manually deleted Core/Src/main.c via file explorer. Opened the original .mx2 project file again, kept using the same output directory, and clicked Generate IDE project.Observed behavior: After code generation finishes, main.c is still missing from the folder. There is no warning message or popup to notify me the main entry‑point file is absent. Consequence: CMake build fails with undefined reference to main.In legacy CubeMX6, when main.c was removed, code‑generation would recreate this template file automatically. This does not happen in CubeMX2 1.1.1.Current workaround: I have to generate project files into a brand‑new empty folder to get a fresh copy of main.c, then copy this file back to my original project directory.Analysis: It seems CubeMX2 treats main.c as a user‑modified file and skips regeneratio

I am really trying to report a problem/bug but I could not find straghtforward way to do it on the STM site. So here it goes:STM32CubexMx for certain object (like USBX) creates virtual folders with spaces in name. These cannot be resolved correctly by STM32CubeIDE (Eclipse) when they are reference links. Project Explore shows folders but with no files and they are not build.For example:UX Device CoreStackUX Device ClassesUX Host Stack The system the tool run under is Windows 11.

I want progrma the STM32C071RBT6 for to get a virtual COM port.I’m using NUCLEO-C071RB board and this are the settings with Cube MX:     I add some instructions into the main like this:int main(void){ /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_CRC_Init(); MX_USB_PCD_Init(); MX_USBX_Device_Init(); _ux_dcd_stm32_initialize(0, (ULONG)&hpcd_USB_DRD_FS); if (HAL_PCD_Start(&hpcd_USB_DRD_FS) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN 2 */ /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE *

Hi!Is there support for enable and view SWO output in the STM32 VScode 3.x.x. extension using ST-LINKV3?For now, this is the only feature that would keep us from moving away from the old eclipse-based platform.If there is no SWO support: Is it on the roadmap?

I am working on a batch script to disable TrustZone on an STM32U595VJT connected via JLINK using the STM32CubeProgrammer CLI tool.The device has both OEM1KEY and OEM2KEY set to [31:0] = 0xABCDEFAB, [63:32] = 0x12345678I am trying to run the following command when the RDP level is 1 and TrustZone is enabled with the device booted into the root secure services:STM32_Programmer_CLI.exe -c port=JLINK mode=HotPlug reset=HWrst freq=4000 ap=0 speed=Reliable -unlockRDP1 0xABCDEFAB 0x12345678 -ob RDP=0xAA TZEN=0The command fails to set the RDP level and TZEN flag with the following output: ------------------------------------------------------------------- STM32CubeProgrammer v2.20.0 -------------------------------------------------------------------Connecting to J-Link/Flasher ProbeWarning: The frequency input is not supported by the connected J-Link/Flasher !Device=Cortex-M33Unlock RDP1 password successfully doneDevice ID : 0x481Voltage : 3.33VFrequency

Heyho,I just found that the STM32L07 has too few DMA channels for my application, so I probably might need to use a DMA channel for two peripherals - surely not at the same time.So when switching the DMA request to another peripheral via DMA1->CSELR, is it enough to disable the DMA channel (DMA1_Channeln->CCR &= ~DMA_CCR_EN (no transfer active)), then set CSELR new? Thanks in advance!

Hi,I'm trying to bring up an IMX219 (Raspberry Pi Camera Module v2) on the “x-cube-n6-camera-capture” reference project for nucleo657x0q, I first tried this under Zephyr and got working capture, but only at reduced resolution.  I've since moved to writing a native driver for “stm32-mw-camera” instead, using “imx335.c” “cmw_imx335.c” as a structural reference template but only at the code/flow level since IMX335's actual register map isn't in any public datasheet I could find. For register values, PLL chain, and gain formula I relied entirely on the official Sony IMX219 datasheet instead, since the two sensors don't share a register layout.My questions are:1. Is there any official guidance for integrating a third-party sensor into `stm32-mw-camera` — driver/BSP side?2. Beyond the lane count and PHY bitrate, is there anything else specific to porting from a 4-lane sensor (IMX335) to a 2-lane one (IMX219) that I should watch out for? If writing a custom driver isn't the recommended path h

Device: STM32H7S3L8H6Datasheet DS14359 Rev 6, Table 26 "General operating conditions", gives forfCPU (CPU clock frequency):    VOS low    max 400 MHz    VOS high   max 600 MHz   (8)    footnote (8): "With ECC disabled"We cannot find any stated maximum for fCPU with the AXI-SRAM ECC ENABLED(user option byte ECC_ON_SRAM = 1). RM0477 mentions ECC only in connectionwith AXISRAM4 wait states, not with a frequency limit.This matters to us because ST's own OEMuRoT/BL2 reference code(OEMIROT_USER_SRAM_ECC in boot_hal_cfg.h) requires that option byte andrefuses to boot without it, so an application using the STiRoT + OEMuRoTsecure boot chain necessarily runs with ECC permanently enabled.Operating conditions on our side: VOS high (range 0), LDO supply,TJ <= 105 degC.Questions:1. What is the maximum fCPU for this device with ECC_ON_SRAM = 1?2. In the OEMuRoT reference code, SetSysClock() selects 380 MHz with the   comment "to be functional with all hardware configurations (ECC_ON_SRAM   enable

I am working on an STM32N6 hardware design, and have reviewed both development kit reference designs (MB1939/MB1940). Both designs use the same power supply scheme, when using internal SMPS it has 2x 3V3 regulators and 3x 1V8 regulators.I am interested in combining several power supplies if possible, notably:1. Is it possible to tie all 3V3 together?While AN5967 suggests to apply VDD33USB in the last step of power sequencing, the VDD33USB supply is noted to be independent of the other supplies within the N6, just like the VDDIOx supplies. The reference designs have tied VDDIO4 to VDD at 3.3V, which makes me believe I could also combine VDD33USB and VDD.Aside from just VDD33USB and VDD, all the 3.3V peripherals on the dev kits come from the second 3V3 supply, can I tie all peripheral 3V3 to VDD33USB and VDD, so I have a single 3V3 rail on the PCB?If not what about the STM32N6 disallows this?2. Can I combine 1V8 for peripherals with VDD18AON?Is there anything against connecting