About BKrug.1

BKrug.1 · 2023-11-10

Hi, I have a device using an STM32U575 and I'm using the internal RTC to keep date and time, due to it being battery operated it goes into shutdown mode for most of it's operating time. The problem I'm having is that the RTC loses it's date and time ...

BKrug.1 · 2023-02-09

I have a custom PCB with a LSM6DSM accelerometer and it's being controlled with a nRF52 running Zephyr. The Zephyr RTOS sensor libraries only have LSM6DSL and LSM6DSO devicetrees. According to the initialzation functions it's communicating correctly,...

BKrug.1 · 2023-11-13

Is there anyway to control this switch between the VDD and VBAT through software? That way I could connect them before going into shutdown mode.

BKrug.1 · 2023-11-13

The VDD never gets turned off in my circuit, the MCU simply goes into Shutdown mode. Do I need to connect the VBAT pin for the RTC to work in shutdown mode? This is never specified on the datasheet or at least I could not find it.

BKrug.1 · 2023-11-10

Through testing a bit more, I found out that by connecting VDD to VBAT the problem is solved, although ideally I need a software solution if possible, as we now have quite a few boards we would need to make the connection manually to make them work.

BKrug.1 · 2023-11-10

I made the device print the whole BDCR right before goind into shutdown mode, this is the result:0000 1100 0000 0000 1000 1001 1001 1011So from this, the configuration as a whole does seem to be correct

BKrug.1 · 2023-11-10

Is there a specific point in the code I should set this bit to 0? I tried putting it right before going into shutdown and right before starting the RTC and didn't change the behavior.

User statistics

User Activity

Internal RTC resetting on shutdown mode

Is the LSM6DSL command set compatiple with LSM6DSM?

Re: Internal RTC resetting on shutdown mode

Re: Internal RTC resetting on shutdown mode

Re: Internal RTC resetting on shutdown mode

Re: Internal RTC resetting on shutdown mode

Re: Internal RTC resetting on shutdown mode