I am using STM32F446RE for my application to just log the time accurately. I have an RTC module DS3231SN[1] connected to the STM32 on the I2C. The RTC is connected to a coin cell battery CR2032[2] for a long life on its VBAT terminal. The entire boar...

I have a custom board with a basic crystal oscillator connected to the High Speed Oscillator pins of my STM32F446RET6. I assembled 2 boards and found out only 1 board works fine but the other does not. I replaced the crystal and the capacitors but I ...

I setup my custom board with STM32F401RE. I am using the HSI a the moment with configuration shown in the image below. All I am doing is printing some lines using this function on the UART2:#ifdef __GNUC__ /* With GCC, small printf (option LD Linke...

I have successfully tested a prototype with the Nucleo F401 board and I have now moved the design to a custom PCB but I cannot program the microcontroller. The microcontroller STM32F401RET6 is not detected in the ST-Link Utility tool or in the STM32C...