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Forum Posts

USB OTG_HS_VBUS on STM32H series

Hi,I have a question about whether or not the USB VBUS connection needs to be made to the micro on the STM32H series micros (in particular the STM32H725) when operating the USB in device mode.We are using a USB-C type connection, so we have an indepe...

Resolved! stm32f4 interrupts and i2c

Hello;I'm writing a driver for a tlv493d magnetic encoder using CubeIDE. This encoder has a peculiarity where it pulls the SCL line of an i2c bus low when it has data ready to be read, at which point the MCU needs to initiate an i2c receive transacti...

sb_st by Associate III
  • 863 Views
  • 5 replies
  • 0 kudos

Resolved! RAMECC1 register reset value

Hi,MCU -stm32h743I have noticed that some RAMECC1 registers have a non-zero value on reset which is against the information given in the datasheet. For example, see the snapshot below:This is when the control is at the starting of main(). As per tabl...

Daan1_0-1732207430414.png
Daan1 by Associate II
  • 921 Views
  • 1 replies
  • 1 kudos

Resolved! Undocumented behaviour STM32C011F4U6TR

Hi,We notice the startup time from power up can be affected by setting one GPIOB pin to input. The startup time here refers to the time from SystemInit() until main(). Basically it contains scatterload and __rt_entry to my understanding.Specifically,...

powerup_time_without_gpiob_input.png 2nd_iwdg_reset_without_gpio.png powerup_time_with_gpiob_input.png
ah2 by Associate III
  • 4187 Views
  • 30 replies
  • 2 kudos

Resolved! Does STM32H743 have integrated crystal load capacitors?

I notice that on the NUCLEO-H753ZI board schematic and BOM, the load capacitors are not populated for X2. My thought is that these caps must exist elsewhere, either built into the crystal, or integrated into the STM32H743.. But I do not see any menti...

BobaJFET_0-1733770911419.png
BobaJFET by Associate III
  • 534 Views
  • 3 replies
  • 3 kudos

Resolved! Unable to modify RAM using ST-LINK_CLI.exe

I'm working with the STM32F407G-DISC1 development board. I would like to change the contents of RAM and hence I type ST-LINK_CLI.exe -w8 0x20000000 0xAB:ST-LINK_CLI.exe -w8 0x20000000 0xAB STM32 ST-LINK CLI v3.6.0.0 STM32 ST-LINK Command Line Interfa...

arnold_w by Senior II
  • 365 Views
  • 1 replies
  • 0 kudos