Hi everyone,I started a project a few weeks ago, which for reasons of urgency I had to use a black pill board as an initial prototype, using STM32F401CCU6 (of uncertain origin). The project continued to develop almost completely until we assembled th...
I use the internal RTC with MCU P/N:STM32U575.The schematic has two power supplies,RTC uses the VBAT power supply, others use the main power supply.My problem is that the RTC can count time normally, but when the main power is powered off and VBAT is...
I am looking at strategies for updating flash over CAN for the F446 (STM32F446RET6). A small loader program resides in addresses 0-0x8000, and loads the addresses above 0x8000 while there is other CAN traffic running. (This has been done and works wi...
I'm using the STM32G030C8 for one of my projects and i realize that in some cases the RTC stops when the power supply is up. While in VBAT supply the resonator works well and provide the correct date and time, but when i use the power supply the reso...
I am experiencing issues with the VBAT pin on the STM32H563ZIT6 microcontroller. Specifically, the VBAT pin is not responding properly. I am using a CR2032 CMOS battery for RTC backup, but it is not maintaining the date and time as expected. When the...
Greetings Everybody, I have Nucleo - F207ZG board. I have attached external 3.0 V coin battery to VBat and GND. I am configuring board for RTC peripheral. After configuring RTC time and again rechecking after 1 day the time starts to move ahead or ti...
Hi Everyone, I have a project utilizing a STM32G030F6P6 with a 32.768kHz crystal and the LSE to source the RTC clock. It is exhibiting 2% clock error (which is huge!) over a 10 minute period despite using a 20ppm crystal. I am measuring this error by...
Any suggestions as to why power down, then reconnect debugger (JLINK pro) is clearing the TAMP registers to 0?Device is STM32L4P5The clock source seems to be present, it doesn't enter the if statement if (LL_RCC_GetRTCClockSource() != LL_RCC_RTC...
Hello, everyone. I'm trying to use an STM32F103C6 to toggle some pins once per second. To this end, I have set up the RTC "seconds" event to fire on the appropriate interval.When busy waiting until the `SECF` bit of `RTC_CRL` is set, it works just fi...
When using RTC, the GPIO pin state of PA4 may be corrupted. RM0454, section 23.3.3 says: "In addition, it is possible to output RTC_OUT2 on PA4 pin thanks to OUT2EN bit. Thisoutput is not available in VBAT mode. The different functions are mapped on ...