STM32 MCUs Products

Hai All!I use 2 pieces of APS25608N PSRAM on OSPI bus with memory mapped mode. The MCU run at 1.8V, 160MHz system clock. Previously, I used APS12808N at 80MHz and 3.3V VDD without any issues.Currently, the PSRAMs run at 50MHz, but need to speed up to 100 or 160MHz.I thought the aps256's default settings should be good up to 100MHz, but they weren't.My working settings at 50MHz was ( relevant source in attachment): MR0: Fix type latency, latency code 5, and full strength (25 ohms).MR8: 32Byte Warp burst and without crossing.OSPI settings are:Dummy cycles:  Read = 8, Write = 4 hospi->Init.FifoThreshold = 4; hospi->Init.DualQuad = HAL_OSPI_DUALQUAD_DISABLE; hospi->Init.MemoryType = HAL_OSPI_MEMTYPE_APMEMORY; hospi->Init.DeviceSize = 25; hospi->Init.ChipSelectHighTime = 2; hospi->Init.FreeRunningClock = HAL_OSPI_FREERUNCLK_DISABLE; hospi->Init.ClockMode = HAL_OSPI_CLOCK_MODE_0; hospi->Init.WrapSize = HAL_OSPI_WRAP_NOT_SUPPORTED; hospi->Init

Hello everyone. I am trying to write a bootloader with STM32H750IBT6 and mt25ql512. I am trying to adapt the ExtMem_Boot example of STM32H750-DK to STM32H750IBT6 by modifying it, but I can't succeed. It doesn't make sense why STM32H750IBT6 does not work. In the software; JumpToApplication = (pFunction) (*(__IO uint32_t*) (APPLICATION_ADDRESS + 4)); __set_MSP(*(__IO uint32_t*) APPLICATION_ADDRESS); JumpToApplication(); but JumpToApplication(); enters HardFault and I get SCB->CFSR = 1025. Whatever I did, I was not successful. Attached I share the bootloader and application projects.   typedef void (*pFunction)(void); pFunction JumpToApplication; int main(void) { /* USER CODE BEGIN 1 */ CPU_CACHE_Enable(); /* USER CODE END 1 */ /* MPU Configuration--------------------------------------------------------*/ MPU_Config(); /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and

Hey guys, I'm looking for some suitable HexaSPI PSRAM and also the OctoSPI Flash for the STM32N645 board I am just building.. I cant find the parts used on the DK so do you have a list of supported memories? I need 256Mb PSRAM and will start with a 1Gb Flash as per the DK..  Richard

Hello, I am planning to use the STM32G474RET6 and would like to confirm whether I can use the internal VREFBUF. This product's package is LQFP-64 and while reading the datasheet I noticed the note : ''The VREF+ pin is double-bonded with VDDA on some packages''. Could you verify whether the internal reference voltage can be used with this package?   Thanks.   

Hello,The datasheet and reference manual are missing information about the 4 KB Backup SRAM in the memory map.Where can I find details about it?We need to use this memory in both Secure and Non-Secure projects.Thank you. 

Hi,The external nor flash AT25XE321D is 32Mbits, support quad IO/XIP spi operation, max. 133MHz Freq. Std. JEDEC/SFDP. It is connected to STM32H7R7Z8J6 with with XSPI1 port-1 interface.I am using MX v6.116.1 to setup project for my board. By IDE v2.0.0, the project 'Boot' works from internal flash but it is failed to run 'Appli' from external AT25XE321D. And the project 'ExtMemLoader' is successfully built and deployed:File copied successfully under STM32CubeProgrammer.File copied successfully under STM32CubeIDEI tried STM32CubeProgrammer v2.21.0 to program the AT25XE321D with using the ExtMemLoader.stldr I just built, but failed too. "Error: Mass erase operation failed." See attached log for more logs.Back to my settings in MX:1) 100MHz XSPI1 clock source2) XSPI1 settings and GPIOsThere 4 memory types available and no 'custom' option. I pick the 'Macronix' as it is most close to AT25XE321D.3) ExtMemLoader settingsI also go through followings but did not help me to solve the probl

Dear allI am using STM32H563 and interface with some CAN bus sensors to receive and sometimes send data to them. The CAN bus sensors are developed by a partner company. I developed my software refer to FDCAN_Com_IT example provided in IDE firmware package. They work fine most of time, but there is an issue has been bother me - for a few sensors, tmy software doesn't receive the message form them, it doesn't generate interrupt simply.  Don't think the sensor module is fault as they can be received by a CANUSB dongle, it seems the issues are with a few fixed sensor modules only, so i am wonder what I have done wrong to miss the message, on Logic analyser, message can be seen although sometimes it is with error, but most of time, they are fine, just doesn't reach my ISR. Regards!Ping

Environment: STM32L4 + 32.768K LSEFunction: Wake up and work once every hour, then enter stop2 mode. During the one-hour sleep, wake up every ten minutes to feed the external watchdog.Problem: The device resets directly when waking up every ten minutes.Current known information: The device was tested in the company for over twenty days without any issues (including restarts, freezes, etc.). After the prototypes were given to customers, problems started to occur in about 10 to 20 days. Currently, there are two failed devices. After power cycling, the devices did not return to normal. External reset also did not restore them to normal. Re-flashing the devices allows them to operate normally, and they are currently under continuous pressure testing to see if the issue will recur.Current debugging progress: When the device restarts, the nRST pin has a low-level time of less than 1ms. The 3.3V power supply pin of the MCU is stable as observed by the oscilloscope. The TP5010_DONE_Pin has a 4

I designed a PCB using the STM32H743 in the TFBGA240 +25 package.When I power the board, the STM32 gets hot. I measured the voltage across the VCAP capacitors, and it is 2.2 V, while it should be a maximum of 1.35 V.What could be causing the VCAP voltage to rise to 2.2 V?

In rm0316 rev 10 for the stm32F303x, the documentation for the ABRQ bits in the CAN_TSR transmit status register states: Setting this bit has no effect when the mailbox is not pending for transmission. I am finding on my STM32F303 that setting ABRQx when the mailbox is empty will actually clear the RQCPx and TXOKx status bits in the CAN_TSR. This effect is important to note, because if you're using the TXOKx bit to determine if the message was transmitted or aborted and ABRQx was set after the mailbox finishes its transmission and becomes empty, you will think the message was successfully aborted (because TXOKx is cleared by the late abort) when it was actually transmitted. Even if you disable interrupts and check the mailbox status immediately before setting the ABRQx bit, it seems like there is still a race condition where the mailbox transmission could complete between the read and write operations, which could occasionally cause the abort to be late.  Is there a way to do this

Hello, I was writing some code and one day a handler_reset() appears in the debug panel It is said that appears because it give the opportunity to the user to debug from the very begining. But why? if there is already the ability to set the breakpoint in the main...  I cannot assign a value to a variable.  And the other things is the fact that since it has appear I cannot longer debug and the variables make no sense. What causes all that and which is the solution??Thanks.          

Heyho,I just changed a big PCB (1st revision working) with a H733 and added a micro SD cardholder and connected it to the SDMMC2 peripheral.Only to find out later that this #2 does NOT work with the extra IDMA controller.SDMMC1 is out of the question because I absolutely need I2SCKIN for the SAIs, and I didn't want to change the complete pin-out and PCB design (Altium says: Components on board: 1015).I'm pretty sure I've checked the RM, but maybe I oversaw something...So, is there any way to use another DMA with SDMMC2 ?Thanks in advance!

Hello Team,  I am using stm32f769 controller. I am using timer 1 channel 4 for pwm output, and my APB1 clock is 180MHZ here I am taking prescaler : 17999 and ARR=1999 and ccr=1000 for this values I can see output of pwm by generating 5hz pulses. But when I want to generate 486 pulses where my psc:17999 , ARR=19, ccr=10, I cant see any output pulses, my pwm is not responding.  (ARR+1)(psc+1)=180MHZ/frequency (ARR+1)(psc+1)=180MHZ/486 (ARR+1)(psc+1)= 370370 ARR+1=370370/18000 ARR+1=20 ARR=19   for some values upto ARR= 40 i am getting output over pwm but from values ARR=20 i am not getting output could you please help me   Thanks vamshi kumar

Hi, I'm trying to implement USBPD EPR Source with DisplayPort Alt Mode on a STM32G071. I use the latest https://github.com/STMicroelectronics/stm32-mw-usbpd-core, which seems to support EPR, but I couldn't find any complete examples with a working EPR source. Now I successfully enter EPR mode, and Sink receives EPR PDOs, but can't negotiate any PDO except the 1st. Even SPR PDOs The stack sends REJECT after PE_SRC_NEGOTIATE_CAPABILITY. It works perfectly in SPR mode and can switch between PDOs, but fails the same PDO in EPR mode 1st PDO in EPR mode ACCEPT: 2nd PDO REJECT: How can I debug these things inside the stack? What am I missing? Spoiler (Highlight to read)uint32_t PORT0_PDO_ListSRC[USBPD_MAX_NB_PDO] = { /* PDO 1 */ ( USBPD_PDO_TYPE_FIXED | /* Fixed supply PDO */ USBPD_PDO_SRC_FIXED_SET_VOLTAGE(5000U) | /* Voltage in mV */ USBPD_PDO_SRC_FIXED_SET_MAX_CURRENT(1000U) | /* Max current in mA */ USBPD_PDO_SRC_FIXED_PEAKCURRENT_EQUAL | /* Peak Current info */

Hi,I have been trying to communicate with an SPI peripheral (NOR Flash). I want to use SPI in half duplex mode. The problem is that as soon as enable the SPI peripheral I see SPI constantly sending OxFF over MOSI even though I have not written anything on the SPI DR register.Pasting the screenshot of the Salea LABelow is the simple SPI TX code void SPI_SendData(uint8_t* Txdata, uint32_t len) { if((spi_dev->SR & TXE_FLAG)) { spi_dev->DR = *(uint8_t*)Txdata; Txdata++; len--; } if(!(spi_dev->CR1 & SPI_EN)) { spi_dev->CR1 |= SPI_EN; } while(len > 0) { // Wait for TXE FLAG if((spi_dev->SR & TXE_FLAG)) { spi_dev->DR = *(uint8_t*)Txdata; Txdata++; len--; } } }Edited to apply source code formatting - please see How to insert source code for future reference.

I have ordered NUCLEO-G491R to test STANDBY mode power consumption. The power consumption measurements are taken via the PPK2 from Nordic.https://www.nordicsemi.com/Products/Development-hardware/Power-Profiler-Kit-2The steps:1. Take STM32CubeMX example project PWR_SHUTDOWN that is available for the Nucleo board.2. Program the board (ensure the JP5 jumper is at the 5V_STLK position)3. Remove the JP5 jumper because we will be powering the board via the external 3V3 (PPK2) 4. Connect the PPK2 to 3V3 and GND on the board. 5. Start samplingSee the results below:When the device enters STANDBY, the current consumption is measured at about 1.5mA which is way above what is declared on the datasheet.What could be the reason that I cant achieve the declared current consumption for the STANDBY mode via the official example project? I am convinced that measurements of the PPK2 are valid as I have used this board in the past to measure very low currents and it was showing reasona

Hello,I am designing a board with an STM32H755ZIT6 and want to verify whether my power architecture is safe.Power architecture:Battery inputTwo buck converters:3.3 V buck → MCU VDD5 V buck → LDO + voltage reference → VDDA and VREF+Operating case:For a certain battery voltage range:3.3 V buck is enabled5 V buck is disabledResult:VDD = 3.3 VVDDA and VREF+ = 0 VRelevant datasheet sections:Power supply management (3.5):When VDD > 1 V, all power supplies are independent (except VDDSMPS).Absolute maximum ratings (6.2):“All main power (VDD, VDDA, VDD33USB, VDDSMPS, VBAT) pins must always be connected to the external power supply, in the permitted range.”All conditions appear to be met, but I want to make sure I’m not missing anything, especially since I remember other STM32 families where powering VDD without VDDA is problematic.Question:Is it safe and within spec on the STM32H755 to have VDD powered while VDDA/VREF+ are unpowered, assuming no analog peripherals are used?I would like to co

Hello everyone!That works:int main(void) { ... init_SPI1(); for(;;) SPI1_Send(); }And that doesn't:void TIM2_IRQHandler(void) { SPI1_Send(); TIM2->SR &= ~TIM_SR_UIF; // reset UIF bit in the status register of the timer }Why?Thank you very much!

HelloIs there a book about Cortex M7 like Yiu J. The Definitive Guide to ARM Cortex M3 and Cortex M4 Processors ?

Hello I'm trying read sector numer 0 from SD card. I use 4-bit mode for sd card reading. My MCU is on Nucleo development board. Card is correctly initialized but when I'm trying read sector I get zeros in buffer and maybe 10 random not-zero bytes. What do I incorrect?After restart I get the same values when I use the same sd-card. But when I use other card - I get other incorrect data.  

Hello, I'm trying read core temperature. I use NUCLEO-U575ZI-Q board. I wrote code: RCC->AHB3ENR |= RCC_AHB3ENR_PWREN; PWR->SVMCR |= PWR_SVMCR_ASV; RCC->AHB2ENR1 |= RCC_AHB2ENR1_ADC12EN; ADC12_COMMON->CCR |= ADC_CCR_VSENSEEN; ADC1->CR &= ~ADC_CR_DEEPPWD; ADC1->CR |= ADC_CR_ADVREGEN; while(!(ADC1->ISR & ADC_ISR_LDORDY)); ADC1->CR |= ADC_CR_ADCAL; while (ADC1->CR & ADC_CR_ADCAL); ADC1->CR |= ADC_CR_ADEN; while (!(ADC1->ISR & ADC_ISR_ADRDY)); ADC1->DIFSEL = 0; ADC1->PCSEL = ADC_PCSEL_PCSEL_19; // preselection ADC1->SQR1 = (19 << ADC_SQR1_SQ1_Pos); ADC1->SMPR2 |= (7 << ADC_SMPR2_SMP19_Pos); // max sample time ADC1->CR |= ADC_CR_ADSTART; while (!(ADC1->ISR & ADC_ISR_EOC)); uint16_t raw = ADC1->DR; volatile float temperature_c = ( (float)(raw - TS_CAL1) * (130.0f - 30.0f) ) / (float)(TS_CAL2 - TS_CAL1) + 30.0f;Unfortunately it doesn't work correctly. ADC1->DR returns

IAR version: 9.70.2Board: MB1930-N6570-C02Project: STM32Cube_FW_N6_V1.2.0\Projects\STM32N6570-DK\Templates\TemplateBoard is in DEV mode, LED2 is on after reset.Hi, I'm unable to debug the template project, once debug session is launched the core just stucks in the bootrom:Also there are some error in the log:Sat Jan 31, 2026 12:25:55: IAR Embedded Workbench 9.70.2 (C:\iar\ewarm-9.70.2\arm\bin\armproc.dll) Sat Jan 31, 2026 12:25:55: Loaded macro file: C:\iar\ewarm-9.70.2\arm/config/debugger/ST/STM32N6xx_DBG.dmac Sat Jan 31, 2026 12:25:55: Loaded macro file: C:\iar\ewarm-9.70.2\arm/config/debugger/ST/STM32N6xx_Trace.dmac Sat Jan 31, 2026 12:25:55: Loaded macro file: E:\mcu\STM32Cube\STM32Cube_FW_N6_V1.2.0\Projects\STM32N6570-DK\Templates\Template\EWARM\FSBL\setup.mac Sat Jan 31, 2026 12:25:55: PC-locked license - IAR Embedded Workbench for ARM Sat Jan 31, 2026 12:25:57: Connected to ST-LINK/V3 [SWD mode 1000 kHz] [Access port: 1] Firmware V3.J17.M10 (Probe no: 002900304142

Dear Sir/Madam,We used the STM32F429ZIT6 processor in a project we carried out for the railway sector, and as stated in the link below, we currently need a SIL certificate to be able to submit it to the auditing firm.Link: https://www.st.com/resource/en/product_presentation/stm32_stm8_functional-safety-packages.pdf

I'd like to use the DTCM ram in my code; how can I do ? Thank you

I’m working with an STM32G473QETx.Does the IWDG window value cause the MCU to reset if the watchdog is refreshed too often (i.e., refreshed too early)?if I set the IWDG window value to something smaller (e.g., 1600), will the MCU reset if I refresh the watchdog more frequently than expected?Any clarification on how the IWDG window works on the STM32G4 series would be appreciated.