STM32 MCUs Products

Export restrictions on STM32 MCUs?

I ordered a bunch of STM32L443CCU6 chips from element14. I got an email from them saying that there are export restrictions on the chips. I’m based in India. How do I get these chips now?

STM32H743ZI programming option byte BOOT_ADD0 address to default value (0x08000000) fails

Hey, I'm using TrueStudio and I'm trying to program BOOT_ADD0 and BOOT_ADD1 by software so I can enable the bootloader and be able to use dfuse to upload new firmware using usb without using the ST-Link Utility to program the option bytes.So far, whe...

RM0383 Rev 3 3.8.6 Flash option control register (FLASH_OPTCR) maybe wrong default value

To whom it may concern:RM0383 Rev 3 for the STM32F411 on page 63 states as default value for 3.8.6 Flash option control register (FLASH_OPTCR)a default value 0x0FFF AAEDValue read back on a new device is however 0x00FF AAEDThis fits more with bits 2...

Hello ST, i have an issue on I2C Bus. I want to communicate with an external device LTC3350.

I just like to read some internal register of this device after startup and also while application is running. But i2c allways retuns that it is busy and does not start any clocking observed via oscilloscope. Shows me all the time that it is busy reg...

Why does the STM32H743 reference manual talk about Cortex-M4 on the SRAM pages?

In the RM0433 rev 7 in the Embedded SRAM chapter:AHB SRAM1 is mapped at address 0x3000 0000 and accessible by all system masters except BDMA through D2 domain AHB matrix. AHB SRAM1 can be used as DMA buffers to store peripheral input/output data in ...

STM32G474CE flash errasing after power on

Hi, I save my configuration structure to flash memory. It work. Data is stored in flash. But after unplug ang plug power memory page is writen by 0xFF.int eepromSaveConfig() { uint32_t error; uint64_t *configPtr; uint32_t address; FLASH_EraseInitType...

STM32F215 - do I need pullups/pulldowns on every pin?

Sectin 6.3.1 of the reference manual says "During and just after reset, the alternate functions are not active and the I/O ports are configured in input floating mode." Floating inputs are bad. Our code will configure all pins appropriately immedia...

STM32H7 FPU exception management

Hello,I'm doing some tests on the STM32H743 FPU (on a Nucleo, from Keil v5 IDE).I've checked that the FPU is enabled (register CPACR) and I've written a basic division by 0 test .volatile double test = 0; test = 1.0 / test;I checked the assembly code...

dear all, i work with stm32f103cb ,Is it possible to use DMA uart and DMA spi together in the same application?. Best regards.​

Power consumption in standby mode STM32H742VIH

I have problems with power consumption. In standby power consumption seems to we be way over the documented ~1,97 uA. Current codes gives consumption around 300 uA. Is there something more that needs to be taken into account when putting the CPU to s...