STM32 MCUs Products

OTP portion of FLASH is a valuable asset in some STM32 families and represents a convenient place to store things like security keys. For this, it is desirable - and, as it's part of FLASH, also quite logically expected - that setting read-out protection to any level above 1 prevents the debugger from reading it.In RM0444 Rev.5 and RM0454 Rev.5 (the current 'G0 manuals), the following text indicates that this should be the case:The following table appears to indicate the same behaviour:

I will be using 16 channels of STM32 ADC and I would like to protect them against overvoltage and ESD (those will be used as device inputs and unwanted situations can happen), my initial thought was to use a Zenner diode array and current limiting resistor on each input. I am into the digital world and I'm not 100% sure if it will work and if it won't distort the input signal. Maybe you know a better solution for such a problem?Thanks in advance for any help!

Greetings!I generate periodically a 10MHz PWM signal of 8 pulses. The PWM signal has high polarity so the first edge is falling. I need to generate an interrupt/event on the rising edge that'll signal DMA to move data from a GPIO IDR to a data buffer. So 8 interrupts/events that cause 8 DMA transfers. I have tried using one pulse mode with a repetition counter of 8 but either the pwm doesn't stop during the interrupt or it goes too fast and if I just generate one pulse with no repetition and use a counter in HAL_TIM_PWM_PulseFinishedCallback(TIM_HandleTypeDef* htim){ tim_irqs++; if(tim_irqs < 8){ HAL_TIM_PWM_Start_IT(&htim15, TIM_CHANNEL_1); } } it generates only one pulse. Variable tim_irqs is declared as volatile. Not doing any of that DMA stuff yet, just been trying to get the interrupts working correctly. I've been thinking if this is an timing problem (program runs t

Hello,I am working on a STM32L073V8T6. I want to use the 1/3 bias functionnality to manage a screen.I have configured the contrast control to 3.26V, the Mode to 1/4 Duty Cycle and the Bias Selector to 1/3 Bias.    But if I write something to CO

Hi i am working with stm32l051c8t6 , i am using wakeup pin 1 to wakeup from standby mode, weather is that possible to make the wakeup pin should act as wakeup pin and also as external interrupt, it should wakeup when an external interrupt is detected on wakeup pin, and make that as count and store in EEPROM for later use, how can i achieve this, guide me to sort out the above requirment 

Hi,I have custom developed board that uses STM32F401RCT6TR as MCU. I have LSM6DSLTR IMU sensor on the board and MCU is communicating with IMU using I2C1 channel (PB6 and PB7). I also have 2.4" screen (ILI9341) that displays IMU values and external EEPROM (on I2C2 channel) to store data. I am facing problem in I2C1 (PB6 and PB7) channel. Sometimes the sensors returns correct values, but most of the times it returns weird data. I think that my library is correct because I used same library in  my another board (that uses STM32F030) and it was working as expected. I have pull up resistors attached to the I2C lines. I also changed the MCU and IMU with new ones, but nothing changed and IMU not worked as expected.  I think it is sth related to my code. Could you please help me to solve this issue? I have attached LSM6DSLTR library and main code to this post.Thank you

STM32F769I Disc：Is the function of stm32f769i dico's QSPI DDR normal?When I used the ddr mode, I could send data using 1line, but when I used 4line, the device was busy until the timeout error occurred, and the data could not be sent normally.However, when configured in sdr mode, data can be sent normally.

This topic is inspired by discussions in ST forum and ARM forum, where a proper cache maintenance was sorted out and an example of a real-life speculative read was detected. Also there is another discussion, where a real-life example of cache eviction was detected.For Tx (from memory to peripheral) transfers the maintenance is rather simple:// Application code. GenerateDataToTransmit(pbData, nbData); // Prepare and start the DMA Tx transfer. SCB_CleanDCa

Dear Sir, Good morning!I use STM32F407vgt6. I need chip ethernet controller with MII interface from STM. I previously used DP83848 from Texas Instr. Please recommend me ethernet controller from STMTIASincerely,Vladimir Naumenkov

When i debug SPI1 on STM32F407, program will jump to 0x00 when write DR register, MCU reset and loop continuely. when i measure the SCLK signal using oscillator, SCLK is always high after SPI1 is enabled  When i write to DR of SPI1, the code jump to mainI check the SCLK keep high after SPI1 enabledI searched on the net, and this is suggest that SPI1 SCLK shared same pin with JTAG-TDO, Jtag should be disabled, but for 407, there is no the JTAG disable instruction in HAL. Is there anyone can help me on this or give me some hints? Thanks 

Hi,I am using SPI on STM32H74II MCUFirst I am using a software NSS and not a Hardware NSS because it doesn't work.I need to transmit 1 byte and receive 1 byte, the two commands one after another see the simple code below : RFID_SS_ENABLE;   status = HAL_SPI_Transmit(&hspi3, buffer, 1, 1); status = HAL_SPI_Receive(&hspi3, buffer, 1, 1);   RFID_SS_DISABLE;I am monitoring the SPI lines by a scope and I monitor 900 us between the NSS enable and the MISO data.I need all this to run and end in sub 30 us.what I can do to run this simple code in the required timing ? Best regardsJawad Khaleel

Dear All,My customer using STM32F205ZG and I have the following issue.I am accessing dual port memory using FSMC function, but when I measured the waveform, I found that CE(CS) did not increase due to BUSY(WAIT). See picture below.setting value : "AddressSetupTime" and "AddressHoldTime" values = "0".Q:1. What is the minimum value for setting "AddressSetupTime" and "AddressHoldTime"? Can I use "0"?2. If I use "0", may the CE not increase depending on BUSY?(When I used "1", it worked fine.)3. When I set "0" to STM32F205ZF using the same FW, there was no problem, but I was wondering if there is a reason why the problem is occurring in "205ZG" MCU.waveform picture :

/* USER CODE END 4 *//*void calculate_DAC_OUTPUT_Freq(void){sysclk = HAL_RCC_GetSysClockFreq();//uint32_t data = SystemCoreClock;pclk1 = HAL_RCC_GetPCLK1Freq();prescaler_bits = (RCC->CFGR & RCC_CFGR_PPRE1) >> RCC_CFGR_PPRE1_Pos;timer_clock = pclk1;if (prescaler_bits != 0) {timer_clock = 2 * pclk1;}

I am using STM32L496ZGT6P. When using DAC along with DMA to generate voltage and frequency of my desired range. But I am unable to get hold of the frequency setting. Sysclk I set is 4Mhz. 20 is prescaler value, 4Mhz/20 = 200000.This is further divided by 10 which is time period(ARR) .I am supposed to get 20000 as output in DAC, which I am getting in UART because of the below function, but I am not getting that in CRO. in CRO I am getting 100Hz when I tap DAC output. I have cross checked the output of the DAC using multimeter also. I am getting 100Hz in multimeter. I am unable to figure it out where is the mistake. So any help in this regard is greatly appreciated.uint32_t Get_Timer2_Frequency(void){   pclk1 = HAL_RCC

I found a issue.if the code isHAL_PWR_DisableSleepOnExit();HAL_TIM_Base_Start_IT(&htim2); it will stop at "if (IS_TIM_SLAVE_INSTANCE(htim->Instance))", but i didnt set break point at here.if i change code：HAL_TIM_Base_Start_IT(&htim2);HAL_PWR_DisableSleepOnExit();it will run successDoes anyone know anything about this?

Hello,I am trying to make STM32F020c8t6 enter boot loader by connecting the Boot0 pin to HIGH via a 10k as given in some forms and pressing the reset. I connected the MCU UART1 to Laptop running Cube Programmer and use the UART option. The MCU uart1 RX , TX and GND are connected via USB to uart converter which is working for all UART communications...My observations: When I tie the Boot0 pin to high and press the NRST(to GND), the processor enters some state which is not running my regular code. But it does not  connect to Cube Programmer via serial port.I tried this patternPattern 2 Boot0(pin) = 1 and nBoot1(bit) = 1 even tried with nBoot=0 also via Cube Programmer and stlink-v3.Cube programmer says no response from the device some K0 stuff also. When I try STM32F103 device the above sequence works perfectly.Please suggest some clues  

The U2 on my STM32F407G-DISC1 is shorted and needs to be replaced.Is the STM32F103CBT6(U2) pre-programmed, or can I just replace it with a new blank STM32F103CBT6 and it gets programmed when you DFU firmware the STM32F407G-DISC1 board.Hardware isn't a problem for me because I'm a Mech Eng, but how all this software works baffles me, ie, I'm assuming U2 is just a micro and needs code before it becomes functional for whatever it does - lol -.

Hi,I'm trying to run STM32F429  using LL library to send data periodically.as a start, i'm sending 1 char every 1 sec, but  i'm receive a wrong char (i send 'A', i receive something not clear), and when i call my custom systemClockConfig function, the UART_transmit function doesn't work.i'm using keil as IDE, i have tryed stmcubeide and with the generated project, it works fine, but even when i copy and past the same exact function (UART config, system clock config, and also the main config) in keil it doesn't work. #include "stm32f4xx_ll_rcc.h" #include "stm32f4xx_ll_bus.h" #include "stm32f4xx_ll_cortex.h" #include "stm32f4xx_ll_utils.h" #include "stm32f4xx_ll_pwr.h" #include "stm32f4xx_ll_gpio.h" #include "stm32f4xx_ll_spi.h" #include "stm32f4xx_ll_usart.h" #include "stm32f4xx_ll_system.h" void vSystemClockConfig(void); static void MX_USART1_UART_Init(void); int main(void){ vSystemC

Hello,I often have problems in using ST website. It is often slow or even unusable.For example, today I'm trying to download the CubeMX library for the L0 platform and it failed 5 times, it worked (slowly) only after changing the internet connection to a 4g smartphone hotspot.Please note that the internet connection of my organization is really fast, for instance I downloaded Android Studio (few GB) in less than a minute, while this morning it took more than 10 minutes for STM32CubeIDE (less than 1GB).Therefore, is this a problem on my side or are the ST servers a bit overloaded?

Hello everyone,I hope you're doing well. I'm currently working on a project using the STM32U575ZIT6 microcontroller, and I'm facing a peculiar issue with GPIOG.I have successfully manipulated GPIOB and GPIOC for controlling LEDs, but I'm encountering difficulties with GPIOG. I've double-checked my connections, and everything seems to be in order.Here's a brief overview of my setup:LED1 on GPIOB is working fine.LED2 on GPIOC is also functioning correctly.However, LED3 on GPIOG is not responding as expected.I've verified the connections and configuration for GPIOG, but it seems that the port is not responding as anticipated. If anyone has experience with this microcontroller or has encountered a similar issue, I would greatly appreciate your insights.Here are some details that might help diagnose the problem:STM32U575ZIT6 microcontrollerLED1 on GPIOBLED2 on GPIOCLED3 on GPIOG

 Hi! We Use STM32F411RET6 IC in our device. When the device is in the factory, STM32F411RET6 can burn the program and run normally. However, in a few weeks, approximately 40% of chips will experience abnormal operation. When erasing the chip, the following error is reported. May I ask what causes such a malfunction?  

Colleagues,Here’s a code snippet which changes the state of two GPIO lines with delays in between.[My actual firmware has more code, and I’ve reduced it to this condensed example which still has the issue.] HAL_GPIO_WritePin(LED_DRIVER_ENABLE_GPIO_Port, LED_DRIVER_ENABLE_Pin, GPIO_PIN_SET); HAL_Delay(1); HAL_GPIO_WritePin(LED_STATUS_GREEN_GPIO_Port, LED_STATUS_GREEN_Pin, GPIO_PIN_SET); HAL_Delay(1); HAL_GPIO_WritePin(LED_DRIVER_ENABLE_GPIO_Port, LED_DRIVER_ENABLE_Pin, GPIO_PIN_RESET); HAL_Delay(1); HAL_GPIO_WritePin(LED_STATUS_GREEN_GPIO_Port, LED_STATUS_GREEN_Pin, GPIO_PIN_RESET); The resulting picture on the oscilloscope looks quite wrong. 

Hello, I'm working on a project using the STM32L412RBT6P microcontroller, and I have a few questions regarding the use of the VDD12 pins to achieve the lowest possible power consumption. 1. Can I directly connect the two VDD12 pins to a 1.25V supply?2. What is the best exact voltage value to provide to these VDD12 pins for optimal power consumption?3. After connecting the voltage to VDD12, are there any additional configurations or settings needed in the code to ensure proper operation and lowest power consumption?4. I noticed in the  NUCLEO64 ext-SMPS (MB1319) documentation that there are four pins connected to the MCU GPIO: SMPS_SW, SMPS_PG, SMPS_V1, and SMPS_EN. Is it possible to only connect the 1.25V supply to the VDD12 pins and omit these connections?5. I found an ultra-low power converter, the TPS62841, with an output of 1.25V. Would this be a suitab

Hello,I am trying to setup clang (and later clang-tidy) in a project. To test clang integration with STM32F4 board I did several steps :1. I created a default NUCLEO413 project,2. I compiled it using the default generated Makefile3. I created a CMake file configured with the linaro toolchainAll these steps works fine. so I began switching to clang toolchain. But now I do have issues, Compilation raises warnings about unused flags :clang: warning: argument unused during compilation: '-D STM32F413xx=1' [-Wunused-command-line-argument]clang: warning: argument unused during compilation: '-D USE_HAL_DRIVER=1' [-Wunused-command-line-argument]clang: warning: argument unused during compilation: '-fdata-sections' [-Wunused-command-line-argument]clang: warning: argument unused during compilation: '-ffunction-sections' [-Wunused-command-line-argument]clang: warning: argument unused during compilation: '--gcc-t

Hi! I want to connect to old hoverboard but  I can't make connection to mcu. I don't have idea why. I try a lot things but nothing worked. The chip is stm32f103rct6. 10:20:01 : UR connection mode is defined with the HWrst reset mode10:20:01 : ST-LINK SN : B55B5A1A000000009532F00110:20:01 : ST-LINK FW : V2J43S710:20:01 : Board : --10:20:01 : Voltage : 3.25V10:20:01 : Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication