STM32 MCUs Products

Hi,During the design with the STM32H743IIK6 MCU few questions arise:(1)  While designing a PCB with the STM32H743IIK6 (UFBGA176+25 package) with VDD=3.3V or 2.8V, I am unable to locate the VCCLDO pin, which is expected to be connected to external capacitor. Am i missing something in the pinout, or does the internal LDO in this specific package rely solely on the capacitors on the VCAP pins?(2) There are two sets of QUADSPI I/O sets: BK1 and BK2 (i intend to use the BK2). However, I do not see any separate clock pins for each. Do both channels share the same QUADSPI_CLK signal for both banks?(3) Regarding the USB interface: I see a VDD33USB pin, but there is no VDD5USB pin. Does this require an external 3.3V DC input, or is it an internal signal output that only requires a decoupling capacitor?Additionally, I am unable to locate the USB_DP and USB_DM pins on the UFBGA176 package. Is there specific hardware documentation / example

The problem is that the transceiver will set the RX pin high at boot , this will put the G431 in boot mode and never start . The question is how to set and reset the nSWBOOT0 bit in the program . I mean , if I am right ::2) at setup (yes , Arduino) , the nSWBOOT0 bit is set in order to disable BOOT0 pin , thus allow normal (CAN bus) operation after boot  on PB8 .1) but this will reset the STM32 , so before doing 2) , one need to read the level of nSWBOOT0 , and only set it if it is 0 . (one time action)3) but this will brick the DFU uploading . To reset this , for exemple by a customer In order to update the firmware , one have to reset the nSWBOOT0 by the program . This could be done by a button , or by a code received trough USB .Hope this is clear enough (and correct of course) . But doing this is not that simple for me , so I wonder if there is a working code available for this (sure , some people have done the trick succe

NUCLEO F767ZI, CubeIDE 2.1.1, CubeMX 6.17.0I'm trying to set up UART with printf()#include <stdio.h> UART_HandleTypeDef huart3; static void MX_USART3_UART_Init(void); int __io_putchar(int ch) { HAL_UART_Transmit(&huart3, (uint8_t *)ch, 1, 10); return ch; } .... // in main // in while prinf("UART test\r\n"); // MX generated USART3 init static void MX_USART3_UART_Init(void) { /* USER CODE BEGIN USART3_Init 0 */ /* USER CODE END USART3_Init 0 */ /* USER CODE BEGIN USART3_Init 1 */ /* USER CODE END USART3_Init 1 */ huart3.Instance = USART3; huart3.Init.BaudRate = 115200; huart3.Init.WordLength = UART_WORDLENGTH_8B; huart3.Init.StopBits = UART_STOPBITS_1; huart3.Init.Parity = UART_PARITY_NONE; huart3.Init.Mode = UART_MODE_TX_RX; huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart3.Init.OverSampling = UART_OVERSAMPLING_16; huart3.Init.OneBitSampling = UART_ONE_BIT_SAMPLE

Hello,I am using the HRTIM on an STM32F334 to drive a buck/boost converter.I monitor MOSFET temperature using NTCs via ADC2, and I also need to measure the internal CPU temperature and VREFINT using ADC1.ADC configuration:ADC1Regular: VREFINT, TEMPSENSORInjected: VinADC2Regular: MosFetTemp1, MosFetTemp2, AnalogStartInfoInjected: VoutIssue:As soon as the HRTIM is initialized (even without starting it), the ADC regular conversion values become unstable.Observations:100 samples of VREFINT only → stable when HRTIM is not initialized100 samples of TEMPSENSOR only → stable when HRTIM is not initialized100 samples of (VREFINT + TEMPSENSOR) → stable when HRTIM is not initialized100 samples of (VREFINT + TEMPSENSOR + ANALOGSTARTINFO) → stable when HRTIM is not initializedAs soo

Hi everyone, I'm new to STM32 and I'm building an audio player. I'm using an SD card (via SPI) to feed audio data to a dac via I2S.The audio stutters and often plays the same 1-2 second snippets twice before moving on.I've tried implementing double buffering and i've checked the i2s configuration in circular mode.Code:https://github.com/darty555/stm32-i2s-dma.git

As asked in the subject: Is there a hole in the memory map of the STM32C552VC (Bank1 from 0x08000000 to 0x08020000 / Bank2 from 0x08040000 to 0x08060000) or are the two banks continuous from 0x08000000 to 0x08040000)

Hi Team,We are observing persistent and repeatable debug connectivity issues on multiple custom boards based on the STM32H745BIT6 MCU. These boards were initially functioning as expected; however, after repeated debug sessions, they started exhibiting failures. We request your support in identifying the potential root causes and guidance on recovery. We have performed Full Chip erase also whenever it was possible.  Below are our consolidated observations captured across multiple boards.Observed IssuesDebug Interface Failures After Multiple SessionsAfter several debug sessions, the following errors are observed intermittently:TARGET_HELD_UNDER_RESETTARGET_NOT_HALTEDTARGET_NO_DEVICEError: Unable to get core IDInconsistent Connectivity Between ToolsThe de

I have a program where I have TIM2 CH1 set up in output compare mode. Approximately 0.5 ms after the timer is reset, CH1's compare value is reached. This triggers the CH1 DMA, which is a dummy DMA on DMA1 channel 1. The SPI TX DMA is synced to the TIM2_CH1 DMA (with a request count of 16, to allow 16 bytes through the SPI), and therefore if it is armed should automatically start at that moment. The purpose of this is to eventually provide an interrupt-free delay for an external SPI slave that requires a 350ns delay between CSn active and SCLK active.I have this all mostly working, but my problem is that about 5% of the time, the SPI DMA does not complete. I can't figure out what in my code is allowing this to happen. The basic structure is:Arm SPI DMAs.Reset TIM2 counter.Wait until the DMA completes. (This should be triggered by TIM2 reaching the compare value.However, for reasons I cannot understand, about 5-10% of my transfers neve

(HAL_SPI_Transmit_DMA works partially, HAL_DMA_Start_IT not working)I’m working with an STM32U5 MCU using SPI3 with GPDMA to drive an ILI9341 display. I’m trying to transmit a larger buffer (~23040 bytes), but display only receives about 1024 bytes, and goes into HAL_SPI_STATE_BUSY_TX forever.Function used: HAL_SPI_Transmit_DMA()Configs:

My FMC clock, set to continuously generated, only cycles during a bus transaction.On my STM32N657I0H3Q, I have the following setup:FMC enabled in applicationChip Select NE1Muxed PSRAMData/Address: 16 bitsClock: Burst Read WriteAddressValid: YesWait: SynchronousThen, in the configuration, I have "CLK generated continuously" set. I have confirmed all of these settings in the resulting fmc.c code. I've also verified at runtime that hsram1.Instance->BTCR[FMC_NORSRAM_BANK1] = 0x183997(Where 1<<20 -- 0x1000000 is continuous clock generation).Meanwhile, my oscilloscope shows the FMC_CLK waveform:

When a USART is configured without a clock, the code generator treats it as a UART and assigns HAL_UART_IRQHandler as the interrupt handler. However, within this handler, there is a blocking operation during the idle process:(void)HAL_DMA_Abort(huart->hdmarx);When certain error conditions occur, the code can become stuck in HAL_GetTick(). This happens because the SysTick priority is lower than that of the UART interrupt. I have observed this behavior multiple times, particularly when noise is present on the UART signal line.Has Anyone seen this situation before?

Hello,I have two Winbond W956D8MBYA (64Mb, x8) HyperRAM chips connectedto XSPI1 on STM32H7S3 in dual memory mode (DMM=1):- Chip #0 → IO[7:0] + DQS0- Chip #1 → IO[15:8] + DQS1- Shared: CLK, NCLK, NCSI need to run at 200 MHz, so I need to configure CR0 on both chips:- Initial latency = 7 cycles (default is 6, valid only up to 166 MHz)- Fixed latency (required for dual mode per RM0477)Problem:According to RM0477, in HyperBus 16-bit dual mode:1. Variable latency is not supported (LM bit in XSPI_HLCR must be set)2. Register space access uses only IO[7:0]. Quote from RM0477:"IO8 to IO15 being not used but driven by the controller"So I can only access registers of chip #0.I also tried MSEL bit in XSPI_CR to switch to IO[15:8] in single memHyperBus mode - no effect.Questions:1. How to write CR0 to chip #1 connected to IO[15:8]?2. Is there any way to initialize each chip se

Hi ST Family,We are using STM32H745BIT6 MCU in our design and interfaced the same to multiple I2C slaves. For I2C lines, we have connected pull up of 2.2K to 5V power rail. In STM32CubeMX, we are enabling "No pullup or No pull down" for I2C lines.Since this MCU family is "not true open drain" ( Page 202 of datasheet), we need to know if we can continue with this configuration.Over the long run, do we see any issues of I2C engine going bad because of this configuration.?Regards..

Hey there community, I am having trouble fixing an interesting scenario on Usart communication,With the same software doing a reception on a given usart interface, It has been noticed the reception segregates one connection but not the other, Both connections having the same configurationIt has been tested that the board on which it fails has connection on that line and that the connection actually reaches the intended pin for sure by testing the Usart Rx pin when set up as a both a GPIO input and latter as an output.by playing with this GPIO input and output mechanisms on that pin. and observing respectively from both the led toggles on the board intended to signify sign of life on the pin and, logic analyzer to see the GPIO state when toggled from with in the system.Note, we are able to see the usart signals on both and are able to decode the messages on a logic analyzer for both, but the stm does not receive

My design uses a STM32H750VBT6 MCU with the USB3300-EZK PHY for high-speed USB. The hardware and software implementations are complete and in general everything works extremely will. The only issue I am seeing is that there are occasional startup problems with the host computer (both Mac and Linux) reading the device descriptor. This occurs about 10% of the time. The Linux error log is: <6>[19177.992026] usb 1-1.1.4: new full-speed USB device number 75 using xhci-hcd<3>[19178.072046] usb 1-1.1.4: device descriptor read/64, error -32<3>[19178.260043] usb 1-1.1.4: device descriptor read/64, error -32<6>[19178.448021] usb 1-1.1.4: new full-speed USB device number 76 using xhci-hcd<3>[19178.528074] usb 1-1.1.4: device descriptor read/64, error -32<3>[19178.716051] us

I'm in need to scan a bunch of contacts in a 4 rows, 8 column diode matrix configuration. PA0-PA7 are the inputs, PB12-PB15 the outputs. What I'm wondering about is the PA0-WKUP special function in contrary to the rest of inputs (PA1-PA7). Do I have to  care about this circumstance?

Hi community !I was working on a custom STM32 board as part of a robotics project. We started evaluating STM32H7 through the Nucleo boards, and now that we've confident with our chip selection, I designed a custom nucleo-type board, which can later be integrated on our main robot PCB. Since we didn't need any additional features, main focus was to have a board with just the STM32 chip (STM32H755ZIT6) along with the basic components needed. During the evaluation, I am not able to establish connection between ST-Link V3 MiniE, it shows "No target found". The board is powered by an 5V external supply, which powers the STM LDO, providing 3.3V for the chip. I tried playing around with the ST-Link config settings like Frequency, Mode, Reset Mode and Speed, but it doesn't help in fixing the error.Upon testing the ST-Link with the Nucleo board, it is able to connect to the STM32 onboard (so the ST-Link board is working fine). Upon rev

hello community ! I'm facing issue wiht RS485 mod on USART3. Please find here a TL;DR of the issue, context, workaround and finaly request for answers. HARDWARE PLATFORMMCU: STM32U595USART: USART3 configured in RS485 modePROBLEM DESCRIPTION:During development of RS485 communication firmware for the STM32U595, we encountered anunexpected issue that challenged our understanding of the USART configuration: USART3 is configured with RS485 mode via HAL_RS485Ex_Init() which correctly sets the DEM (Driver Enable Mode) bit in CR3 for hardware-controlled driver enable:HAL_RS485Ex_Init(uart_handle, UART_DE_POLARITY_HIGH, 16, 16);This is the documented, correct approach for RS485 with automatic driver enable pin control.However, after extensive investigation and troubleshooting, we discovered

Hello, I'm reading the article on "How to create an STM32N6 FSBL load and run" and have a couple of questions about DFU implementation on the STM32N6: 1. Is DFU possible with the application as part of the FSBL? 2. Is there an example on how to implement DFU for when the application is part of the FSBL and also where the application is separate from the FSBL? https://community.st.com/t5/stm32-mcus/how-to-create-an-stm32n6-fsbl-load-and-run/ta-p/768206 I'm using the stm32n6570-dk eval board. Thanks!

Is there an easy way to find devices that support specific CAN buffer configurations?For example, some only have receive queues whilst others allow a number of receive buffers to be configured (which is what I want). I know the H7x7 supports this, but does anything else?

Hello everyone,We are having trouble getting tracing to work with our target at full clock speed and would like to understand why, we have an application running on STM32U575 @ 160MHz CPU clock, we also connected the J-Tracer to it using a connector glued next to the uC and short wires (~10mm) to PE2 ... PE6 (pins 1 to 5 on the LQFP100), the GPIO pins are all configured (using a JLinkScript) as AF and at maximum speed, and from what we understood on the documentation (Arm trace technical specification - SEGGER Wiki​) the trace clock and trace data operate at half the CPU speed, I checked the ST datasheet and the GPIOs we are using should be good up to 100MHz, so in theory the trace should be possible with the CPU running at 160MHz and outputting trace data @ 80MHz, or?

Hi,I do not plan to use USB, and the STM32N6's VDD is 1.8V.However, creating a new 3.3V power supply just only for the VDD33USB pin is too inefficient.The datasheet lists the absolute maximum ratings for VDD33USB as ranging from 0V to 3.6V when USB is not used, and the comment below states the following:1. All main power and ground pins must always be connected to the external power supply, in the permitted range.Therefore, Finally if I do not plan to use USB on the STM32N6, which of the following options should I choose for the VDD33USB pin?(have to consider leakage current in stop mode)1) NC2) 3.3V (by creating a new power supply)3) 1.8V4) GNDthanks in advance.

Hi, I am tring to write data by the FDCAN bootloader of system memory, my target is STM32H563. Now, I can read the device ID, perform the mass erase command, but I can't write data to SRAM/Flash, the FDCAN bootloader doesn't response any CAN message after the Write_Memory command. Below picture is the CAN message log when I try to write 64 bytes data to flash at 0x0802_0000.

Hello,I am writing to seek advice on connecting an APMemory APS12808 OSPI memory to the STM32H723ZGT6 microcontroller.Initially, I attempted to adapt the code from this thread ( https://community.st.com/t5/stm32-mcus-products/stm32h7-octospi-mode-hyperbus-hyperram-access-and-delay-block/td-p/143237/page/2 )  from @Alex - APMemory  to the STM32H723ZGT6. You can find the result in the attached file `main_1.c`. With this configuration, read and write operations do work, but I am encountering issues with data mismatches/corruption.Subsequently, I tried to enable the Memory Mapped mode based on Application Note AN5050. This is where significant problems began I cannot get this mode to activate. The relevant code is in the attached file `main_2.

Hi, I am using an STM32F767ZI to communicate with a Dacai HMI display over UART7 at 9600 baud. Sending data from the STM32 to the HMI works perfectly, but receiving data from the HMI is unreliable. The same HMI works fine when communicating with other MCUs—both TX and RX work reliably.When I touch: screen ID = 0 control ID = 12 HMI tool shows this frame:   EE B1 11 00 00 00 0C 11 31 32 00 FF FC FF FF ( Data : 12 ( 31 32 ) ) Data reception does not match actual touch event HMI → STM32 reception is very unreliable Callback (HAL_UART_RxCpltCallback) is trig