STM32 MCUs Products

STM32F071RB RTC Backup Register write protected after Standby

I'm experiencing some problems with a project I have taken over. The Processor is STM32F071RBT6TR and the problem concerns writing data to the RTC Backup Registers. After a power on reset there is no problem writing to these registers, however after ...

X-CUBE-SMCARD issue

Dear,I designed my own board similar to STM3210B_EVAL.I built the X-CUBE-SMCARD project and programmed it on my board.The smart card that I use, response to ATR, but no response and no Ack to another commands ( same as Select File ,...)how can I deb...

I am using STM32F373VC microcontroller. I want to interface a usb keyboard to toggle led connected on pin by pressing key on keyboard.please help me.

can STM32H743 act as device and Host at the same time using on chip PHY?

i am using NUCLEO-H743Z in my investigation. is it possible to use both on chip USB core to get use like one as device and another as host at the same time, using on chip PHY only.if so, can any one guide me for the same.

Chip Revision Number doesn't match the reference manual document.

The value at the address 0xE004 2000 (DBGMCU_IDCODE) is 0x10006430 which means the revision id is 0x1000.  Per the RM008 Reference Manual the only valid value is 0x1003.  I'm looking in errata document to determine which I2C issues apply to the proce...

SWIM example code or libraries which implements the SWIM protocol.

As most Discovery boards for STM8 devices use an STM32 to implement the SWIM interface. ST must have examples or libraries available to implement this SWIM interface. Are these available to the public ? Such STM32 code will speed up development of g...

RTC and Alarm subsecond mask

Dear,I want to use an Alarm A in RTC mode. But have some trouble with it.1) I use LSI 37000 Hz2) for 1 Hz I selected PREDIV_S=7399 and PREDIV_A=4It means that my Granulanity is 1/(7399+1)When I want to wakeup for example in 100 ms.1) I read actual ...

STM32L051... How to use ADC as simple as possible to measure VREFINT ?

My application is in STOP Mode the most of the time and is powered by a CR2430 battery. When woken up, I have to send quickly an alarm through a RF chip (for about 5ms) and at the end of transmission, I would like to calculate the battery level. For ...

I want to fetch the USB device details connected to STM32F407 Discovery board.

Hello all,I am working with CDC configuration of USB in FS mode on STM32f407 discovery board.I connected the mobile via OTG connector.I can successfully transmit the data to virtual port and can fetch the board VID and now i want to fetch the inform...