STM32 MCUs Products

STM32F407 RTC

I use the RTC of STM32F407 with LSE (32.768 kHz).A battery is connected to VBAT for backup.In the reference manual, the Backup operating voltage is at least 1.65V, but the RTC is actually backed up to about 0.3V.I do not know the reason. Could you te...

How to use external interrupt as toggle. for start and stop some process. For example start and stop pwm stream I think the challenge is having wakeup pin and external interrupt pin on same pin. Any help would be greatly appreciated.

I am using stm32f429 , i am getting error while i am doing RX operation, I am able to perform TX operation. USART1 is not even updating the register value during debug operation. if anybody has faced same situation please share answer.

Multi slave SPI for STM32F427ZIT6

Hi,I am using STM32F427ZIT6 for one of the design. I am new to designing. I am connecting 8 ADC's to this device using SPI. I am using SPI4 (Pin 1,4,5). I want to know whether chip select (8 nos) can connect to any IO's?? Because NSS (slave select) i...

Bug of GubeMX....Where to find the file stm32f7xx_hal_exti.h ?

CubeMX generate file stm32f7xx_hal_conf.h. There is a lineы in this file#ifdef HAL_EXTI_MODULE_ENABLED #include "stm32f7xx_hal_exti.h"#endif /* HAL_EXTI_MODULE_ENABLED */File stm32f7xx_hal_exti.h does not exist at all anywhere else

RTC periodic wake up interrupt fires only once

Posted on January 26, 2018 at 21:05 Hi, I'm writing an application with a STM32L051 (32 pin, 64kB ROM). This application uses the RTC and I wanted to use the RTC periodic auto wake-up feature to update the time display every 60 seconds. THE...

How to start and stop timer/counter using separate external pins (i.e. stopwatch)?

I need to accurately time the delay between two rising edges being triggered (charging time of a capacitor). The device I'm testing this out on is on a Nucleo-H743ZI but eventually want it to run on a Nucleo-F446RE so am not looking to use the HRTIM ...

Fixed version of Cortex in STM32H7 ?

Hello,I've heard that some bugs have been found on Cortex M7 related to cache management, and that the STM32H7 will embed the fixed version of Cortex design. But I can't find when this updated version of STM32H7 will be available. Also, where (in wha...

About FMC-SRAM transmission

hi ，I have some problms about FMC-SRAM with own r&d board based on stm32h750，hope someone give me some hlps�? Now we have a strange problem that we operate on an external 16-bit bus. If we just write a word (16-bit) that is 2 bytes, the actual bus op...