STM32 MCUs Products

CASE 1:I am using  sdmmc for SDIO bulk transfer at 400khz initially then switch to 25 mhz.Its not working with nucleo h743/53 where cpu frequency 480 mhz and sdmmc input clock is 480 mhz.Its working with nucleo h743/53 where cpu frequency 480 mhz and sdmmc input clock is 48 or 50 mhz.Its not working with nucleo h743/53 where cpu frequency 160mhz and sdmmc input clock is 160 mhz.Its is working fine with nucleo_u5 when CPU frequecy is 160mhz and SDMMC input clock is 160 mhz which gets converted to like:26.66 mhz.I have not checked upto which max sdmmc frequecy it is working fine with nucleo_h743/53.It seems to be working when sdmmc input clock is ~50 mhz with nucleoh743/53. Q1: Is there any recommendation with sdmmc input clock frequency with nucleoh743/53? 

I am implementing a CAN communication structure with one master and two slaves. Both slave devices perform exactly the same function, meaning their hardware and firmware are essentially identical. The master’s intention is to send commands only to a specific slave at a given time and receive data only from that targeted device. However, the issue I am facing is that any CAN frame transmitted by the master is being accepted by both slaves. Because both devices share the same ID filtering configuration, each slave interprets the incoming message as if it were intended for itself. As a result, the system behaves like a broadcast communication instead of the desired unicast structure, which leads to unintended and incorrect operation. Is there a solution

Hi,We have STM32N6570-DK and are testing camera input, video encode and write to SD cardWe have not been able to make the "VENC_SDCard_Appli" example work, the SD card just contains zeros.The "VENC_SDCard_ThreadX" example does work however, resulting in an 800x480 video.Are there any examples on encoding at 1080p resolution? Changing the encoder parameters and level results in memory allocation failures in EncAsicMemAlloc_V2.Many thanks 

In the STM32L4P5xx datasheet, some pins' IO structure is labelled with _l (in combination with other letters). However, this letter is not explained in Table 14 nor anywhere else.Can this please be explained?Thanks,JW

Hi, I run ADC1 with DMA on my STM32F303RE with 72MHz clock.  I take the number of samples flowing into the circular buffer per timeunit.  I calculate a sample freq. of 1.305 Megasamples per second Ms/s. When I look at the sampled known signal I calculate a sample frequency of 1.518Ms/s. I'm losing samples somewhere !?  Where? Is it due to ADC or DMA?  ADC setup: Independent mode,Synchronous clock mode divided by 4, 12Bit, scan disable, continuous enable, enable regular conversions enable,  DMA setup: ADC1 DMA1 CHANNEL1, circular buffer 15*1024*uint16_t, increment address memory, half word THX Cheers Detlef  

Hi. I'm new to STM32, and I'm using STM32F103C8T6. I want to run Loopback mode to test CAN BUS without another board first. When I go to debug, I find it stuck at HAL_CAN_START. It returns error code 131072. Can you guys please help me find out the problem? I also give the main.c below. Thanks for reading./* USER CODE BEGIN Header *//********************************************************************************* @file : main.c* @brief : Main program body******************************************************************************* @attention** Copyright (c) 2026 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directo

Hi,  I have been trying to deploy the 66GYMAI1 Camera on the STM32 N657X0Q Nucleo board with the Load and Run mode. However, there is a problem that I could not solve, which is that the project can not jump from FSBL to APPLI. Because I am trying to jump from FSBL to APPLI to print something by USART, but it doesn't work.I would be grateful if someone could check it.   

Hello Expert, Could you please provide guidance on the issue below?  We are using the following setup:- MCU: STM32G0B1CCTx- Software: X-CUBE-TCPP 4.2.0 with USBPD Application 4.2.0 Dual Role- Board Part: TCPP0203 v1.2.3 We are developing a USB PD board.When we plug in an Android smartphone (USB Type-C port), the phone does not detect the connection.Attached is the log showing three plug-in/plug-out attempts.(we plug in and out 3 times)From the log, it appears that after attachment, the connection detaches immediately, then the roles switch, followed by another detachment.We have already tried increasing the CAD source/sink toggle time from 100 ms to 144 ms, but the issue persists.Could you advise on possible causes or solutions? Thanks. DEBUG 86569 0 -- BSP_USBPD_PWR_SetRole : SNK -- 96DEBUG 86609 0 -- BSP_USBPD_PWR_SetRole : SRC -- 97D

I have a new STM32N6570-DK MCU, I am running a simple program configuring ADC1 with the help of STMcubeIDE, selecting application mode, in secure mode, I have connected one sensor who is biased at 1.5V to A2 of MCU as well as ground of sensor and MCU are connected, code has been generated with some basic settings, It is not getting Debug properly, sometimes code is crashing before entering in main, sometimes board is not responding at all, before that I tried blink LED that worked Kindly tell me the proper steps to make this code run Is there any proper step to initialize the MCU when using for first time? Is application mode in secure version is okay for data extraction from analog sensors with the help of ADC I am attaching the related files, kindly reply

hello:@mƎALLEm I'm currently working with the STM32U585 and ran into a problem abort CAN auto Retransmission.Context:There are three devices on the CAN bus: stm32u5, A and Bstm32u5 enable auto Retransmissionstm32u5 need to keep sending them messages, regardless of whether they are connected or notdevice A and device B have hardware message filtering, So if A or B receives a message that is not intended for it, no ack will be sent(Is this correct?) I want to know:If A is online and B is offline, how many times will the message sent to B be resentIf it will be resent many times or never stops, how do I delete the failed resend messages after tx fifo is full

Hello, We are using the RTC wakeup timer and I have noticed that sometimes the WUTIE and WUTE bits are not being set. We are using HAL_RTCEx_SetWakeUpTimer_IT() HAL function to enable the timer. In stepping through the HAL code, it sets the RTC_CR_WUTIE and RTC_CR_WUTE bits but does not check they are actually set, so I assume it is expected to set the bits. I have read through the reference manual (RM0456) and existing errata. There is no existing errata w.r.t the RTC unit that applies to this situation. Any insight would be appreciated. Thanks, Aidan  

Pls cross  TI part number TMP75AIDGKR (Temperature Sensor With I2C and SMBus Interface) Previously there's a Cross Reference tool in ST website but it's gone. I use it regularly. I hope it can be reinstated. 

I have a problem, where there's simply no error, but the output, is not showing on the screen. The system has detected the board, and all the correct steps are followed, even though, my hello world code is not been printed. I am using stm32cubeide version 2.0.0 and im using a nucleo-h723zg. Also, the board is first showing a static red light when plugegd in to the laptop, and then a patternt that repeats ----> red, green red,green and then green for 1 second and then it keeps on going. I even flashed my whole baord and erased everything, despite that, it is showing the same behaviour. So far, I haven't recieved any error, the only thing is that i am not able to see the output on the screen of the ide that im using.  Here's a link for the led problem(chatgpt says its a firware issue evn though i downlaoded the correct firmware) Video link:

HelloIm developing a CAN Bus node and with space constrains, so i ve looked in stm32 products and a qnf32 packages looked perfect for example stm32G0B1 has FDCAN. The problem...These QFN32 dont expose HSE pins. I just can use HSI with 16 MHz +- 1% wich is not reliable for FDCAN, especially for industrial applications with many nodes. I dont understand why the mcu hás 2 FDCAN peripherals if theres no reliable clock to Run them.Im i missing some thing here? At are my alternatives? I now that QFN48 hás HSE, but i dont need só much io and the packages is bigger.Help here 

Greetings,Being rather new to designing/connecting electronics components, I got some questions regarding battery monitoring.Setup:NUCLEO-L432KC, driven by regular AA NiMH batteries in 3S configuration. Voltage is regulated by a small board based on a TI TPS63802 buck-boost-converter, which ensures a stable 3.3V output for the Nucleo board. The MCU is running stable with this power supply, everythings works out so far.Task:Now there's monitoring of the individual battery cells on the table. With three cells, three ADC inputs are required (if you don't do some switching outside of the MCU). The NiMH cells in question are rated at 1.2V nominal, with close to 1.4V when at full charge. Thus, if you measure the voltage after each cell, it would result to 1.2V, 2.4V and 3.6V nominal (or 1.4V, 2.8V and 4.2V max).Gathered intel:I understand that the ADC can only measure voltages between 0 and VR

 I'm developing a power bus manager where I monitor current and voltage drop across a shunt resistor. I chose the STM32G484 as the MCU because it has enough OpAmps and ADCs for my project.However, I have a question that might only be related to electronics, but I'd like to be sure it won't affect the MCU.The bus is supplied by a DC-DC switched-mode power supply where the highest voltage is 12V. We know the voltage drop across the shunt resistor is minimal. So, could I connect the "plus" and "minus" inputs directly to the shunt resistor? Is it necessary to define the gain loop? Or can I work without it? In this case, the question is whether the MCU allows parameterizing the input where "plus" and "minus" are connected directly to the GPIO without any internal interference.Thank you for your support.ps: The project is being developed under CC-By 4.0 license and is available at

Hello,I would like to get information about the availability of the following devices:STM32H562IGK6 UFBGA 144 package (10 × 10 mm, 0.8 mm pitch)STM32H562IGT6Could you please clarify:Are these devices currently available in stock for production volumes (~1,000 pieces)?If they are out of stock, what is the reason and what is the expected availability / product longevity?Are there any d

I am working bare-metal on an STM32L433RCT6 (no HAL). I am seeing a precise data bus fault whenever I access a GPIO register.Fault details from the debugger:Fault type: Precise data bus faultBFAR: 0x48000000From RM0394, 0x48000000 is the GPIOA base address, so the fault occurs exactly on GPIO access.The faulting instruction is a normal GPIO register read/write (e.g. ODR access). The GPIO struct layout and offsets are correct, and the compiler generates correct code.I understand that on STM32, a precise bus fault on a valid peripheral address usually means the peripheral clock is disabled.However, I explicitly enable the GPIO clock before accessing it:*(volatile uint32_t*)0x4002104C |= (1 << 0); // RCC_AHB2ENR, GPIOAENAdditional context:

I would like to know how I can program 2 MCUs (stm32wb55cgu6) simultaneously.Currently, I am programming the FUS and BLE binaries (firmware developed by the company).We need to double production, but I can't program via DFU because an error always occurs in one of the MCUs. Is it possible to program 2 MCUs simultaneously, or is that not possible?

I have an STM32L011F4P6 with an RTC.  It is running at 3.3V and 16 MHz off the internal HSI RC clock.  The RTC is driven by a +/-20ppm 32.768 KHz crystal.  It is running at room temperature (23-25C).  After calibration, I am losing several seconds per day!  What's wrong?Here's more information:I have a auto-calibration routine where it will output a 1Hz signal on PA2 and capture the rising edges using TIM2 channel 3, running at 16 MHz.  I capture the start time (1st edge), I interrupt on overflow and add 65536 to a 32bit variable, and I capture the final (33rd) edge to get the total number of 16MHz clocks in 32 seconds according to the RTC.  At the same time, I have a GPS module with a 1Hz output fed into PA10.  I set up TIM21 channel 1 identically to the TIM2 setup, to capture the total number of 16MHz clocks in 32 seconds according to the GPS.I take the two numbers and find the difference, not in PPM but in

In my project I've set the SPI clock to 125MHz; with a SPI prescaler value=4 all works good, when I set it to 2 the SPI stops working and ther is no clock signal.Any helps ? Thank youCarloV

I call HAL_UART_Init() with LPUART1 at 20Mbaud but when I activate assertion it fail at IS_UART_BAUDRATE().The IS_UART_BAUDRATE() is not correct for LPUART that can have a baudrate up to 53.3 Mbaud.Also for UART, the comparaison in IS_UART_BAUDRATE() should be <= instead of < like in IS_LL_USART_BAUDRATE().

Greetings!I have the following system:STM32U073CCVBAT pin is connected to a super-cap, and it's voltage was measured to be above the required minimum.During system reset (NRST) it behaves according to my expectations, the RCC_BDCR remains unchanged, but if it is disconnected from Vcc, then upon connecting it back, the LSESYSEN bit is set to 0. This seems reasonable, and is generally not a issue to me, but the reference manual claims that this shouldn't happen? (Everything else works perfectly.)Am I missing something obvious here?Couldn't find any other mention of the bits behav

Hello,    We have developed an image capturing application successfully based on STM32H7xxxx and OV7725 camera. We are now targeting to port the application to target STM32U5xxxx with the same camera. But it looks the DMA doesn't works as expected. The DCMI DMA complete callback is firing with no image data in the target buffer.     Please guide us how to port the application from H7 to U5.Best regards-Shubhendu Bikash BanerjeeAttaching here snaps of the configurations we made so far.DCMI GPIO

Hello @Imen.D , A side question: RM0440 for G4 says oversampling mode does not support offset. Any change to this position as like the H7 change?  Solved: 'H7 ADC offset correction in oversampling mode - STMicroelectronics Community Thank you. SK