STM32 MCUs Products

STM32H753 initialization failure when in contact with the chip physically

Our application is to use STM32H7 to finish the communication to FPGA/LAN9252/PHY/SDRAM. The power supply of VDD3V3 is generated by an LDO with Tr = 2.4ms. During the test, we found that if we get in contact with STM32H7 (not pins but the package) b...

STM32L0 - Microseconds delay function

Hi everyone!I am using a STM32L0 board and I need to read data from a sensor. To be able to do this, I need a microsecond delay function, but I could not find any way to achieve this.I need some help! Thank you!

On an STM32H7, which clock frequency determines Flash wait states?

In RM0433 revision 5 section 3.3.8, the following text appears: “To correctly read data from Flash memory, the number of wait states (LATENCY) must be correctly programmed in the Flash access control register (FLASH_ACR) according to the embedded Fla...

Hi What is the difference between F series microcontrollers and H microcontrollers? Which series is better to start learning?

Proximity sensor and STM32F030R8T6 for RPM Measurement

Greetings Friends.I want to interface proximity sensor with STM32F030R8T6 for measurement of RPM. I need guidance on how to make it possible and easy with out the use of PLL ic .I was thinking of interfacing proxy sensor output to STM32 pin and take ...

STM32 signalling for RS-485 - DE?

We are using the STM32F091RC to setup an RS-485 interface with the TI SN65HVD11. How do we connect to the DE control signal for the SN65HVD11? I have currently selected USART3 -R - PC5 (RX)D - PC4 (TX)DE - PB1 (RTS) Is this correct? Also what is CK_R...

SDIO works well in SD-1bit mode but not in SD 4bit mode

I am using cubemx generated SD card test code on a custom board. And everything looks fine in SD 1bit mode, I can create new file, read and write data to it correctly. But when I am using 4bit mode, the f_open() function stalls. What might be the pro...

STM32H7 AXI bus clock stopped in CSleep?

According to RM0433 revision 5 section 7.5.12, “The AXI bridge clock is enabled when the CPU is in CRun mode.�? Does this mean that the AXI bridge clock is disabled (and presumably things connected to the AXI, like the MDMA) do not work in CSleep? Th...

Possible ways to save 40Kbytes/Second?

I would like to know what are the possible ways to save 40KBytes per second? what type of memory devices do i have to use. I presumed of using class 10 memory card but it has only 10Mbitspersecond (= 1250KBytes/second). I would have to store atleast...

Disabling a timer after PeriodElapsedCallback is called

So I have two timers, one in OC mode and one in IC mode. The IC waits until the OC toggles, it registers the value and waits for it toggle again to record a second value. What I want to do is after the OC timer has toggled twice is for it to disable ...