STM32 MCUs Products

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STM32H745 SDIO not working

Hi,I have tested STM32H745 CM7 SD 1bit mode with out RTOS from cube generated files (STM32Cube_FW_H7_V1.7.0) and it's work fine for FATFS file operations, as soon as by adding freeRTOS in cube, the generated files have HAL SD init and f_mount works b...

VDesa.1 by Associate III
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  • 1 replies
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How to detect IDLE in SMBUS Multi-master?

I'm using SMBus on an STM32F303. The application has the STM32 as host, SMBUS charger and SMBUS battery, the charger and STM32 can act as master.I need to infrequently read from the battery and want to check for IDLE before initiating a transfer.I've...

iguffick2 by Associate III
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Resolved! I2C speed mode is defined only by timing?

When I2C "Speed mode" changes in CubeMX/IDE from Standard to Fast, it seems that only the Init.Timing value changes in generated code.This value goes into TIMINGR register of the I2C .Am I missing anything or this value defines the "speed mode" entir...

Pavel A. by Super User
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  • 3 replies
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The external RTC clock of stm32f765igt6 chip,the waveform of the clock is very small,RTC clock is very inaccurate.This is whether the crystal oscillator or capacitor selection problem, or our single-chip RTC drive problem;

For the external RTC clock of stm32f765igt6 chip, we use a 32.768KHz crystal oscillator of Epson, which is equipped with 10PF capacitor. Some of them will make the MCU unable to start, and reduce the capacitance value to 2pF, MCU can start, but we ac...

晓杨.1 by Associate
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  • 1 replies
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LPTIM CFGR WAVEPOL description

Hello,both STM32L4 and G4 reference describe in LPTIM->CFGRBit 21 WAVPOL: Waveform shape polarity       The WAVEPOL bit controls the output polarity       0: The LPTIM output reflects the compare results between LPTIM_ARR and LPTIM_CMP  registersThis...

How STM32H747 dual-core M4 and M7 go into stop mode separately with the allocated peripheral DeInit and ReInit after wake up

Hi,I want to set the dual-core MCU into stop mode respectively with allocated peripheral like UART/ADC/I2C/SPI/TIMER, DeInit the peripheral and disable the corresponding clock and start a lptimer to wake up the core before entering the stop mode, lpt...

Vzhan.1 by Associate
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Auto WakeUp due to floating of wakeup pins?

We are trying to build MCU application that require wakeup from standby mode using wakeup pins. MCU we are using STM32L412KB and it consists of 2 wakeup pins on PA0 and PA2.As per figure 3 we want to connect PA2 wakeup pin to USB V sense to wakeup us...

JKSah by Associate II
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  • 6 replies
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