STM32 MCUs products

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Resolved! Calculate the frequency of the QUADSPI.

I have developped a graphical demo with the STM32H735 discovery kit, and the minimum frequency of the OCTOSPI to have a clean display is 66 MHz (framebuffer = 480x272x32). Now I want to use in my application an External RAM with QUADSPI (framebuffer...

Saif by Associate II
  • 7 replies
  • 0 kudos

Resolved! Error report on AN4839

Hello there, recently i have found a error in the application note an4839.The strongly-ordered memory region in the Table 2. Memory region shareability and cache policies is remarked as non-schareable. Howerver according to ARM DUI 0646B ARM Cortex-M...

JPan.4 by Associate II
  • 2 replies
  • 2 kudos

reading arrow key from UART

Hello, has anyone ever used UART to read arrow key? I tried using STM32 MCU on CubeIDE, but can only get two characters ASCII number 27 and 91 and couldn't get the third character which is supposed to be 'A' for Up key, 'B' for Down key, 'C' for righ...

Crane by Associate III
  • 4 replies
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Resolved! Writing a NULL byte into the STM32L15xC6T6 Data EEPROM. Data sheet says it is not allowed. In practice, in some devices work in others resets the processor. Please clarify

I have some projects that were left inadvertently with some function calls that write 0x00 bytes into the data EEPROM. They work properly. I have tested it.I detected the problem on a prototype board with an old sample of STM32L152C6T6 and this made ...

AMott.1 by Associate II
  • 12 replies
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STM32H753XI. When 2 DMAs are working and writing data from SPI1/2 to SRAM1/2 the received data has errors. When only one DMA is working the received data has no errors. Why?

I am using STM32h753XI.The MCU uses 2 SPI channels (SPI1 and SPI2) in slave receive mode.The MCU uses 2 DMAs channels (DMA1 stream0 and DMA2 stream0) to read the data from SPI1 and SPI2 and write it to SRAM1 and SRAM2 respectively.The input SPI sclk ...

nHasi.1 by Associate
  • 5 replies
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BOR vs PVD Detection Logic

We have seen PVD triggers when there is transient load of 1A added on the 3.3Vdc (loaded additional to our design through electronic load) and it triggers when the transient load dips the 3.3V for duration of ~450 micro seconds.We have seen BOR trigg...

SPati.7 by Associate III
  • 2 replies
  • 0 kudos