About MBles.1

MBles.1 · 2021-08-18

I'm using a STM32L072CZT6 in a mobile application in which I need the MCU to start up as fast as it can. Currently the start-up time is 6ms. That appears to be too long based on this thread (Start-up time too long), although I haven't found a typical...

MBles.1 · 2021-08-23

Thanks, I see what you're saying. I looked at other families and they all have max reset temporization of 3-4.5ms except for the G series, which is 0.4ms. So it appears to only hardware time decrease is by switching to a STM32G MCU.For the software s...

MBles.1 · 2021-08-19

I've seen stuff about adding a noinit section to the linker script so a variable isn't initialized, but I don't know how to apply it to the whole code. Wouldn't this as well as optimizing the Cube code only affect the time after NRST goes high? Or do...

MBles.1 · 2021-08-19

Thank you for the response.I already removed the 100nF cap in the first post, which reduced the start-up time by 3ms.The remaining 3ms may indeed be the reset temporization, but I also already disabled BOR in STM32CubeProgrammer. Enabling it to the h...

MBles.1 · 2021-08-19

I did some more digging and found out that NRST does not go high until 3ms after the 3.3V rail is stable. See the attached image where yellow is my voltage in, cyan is 3.3V, magenta is NRST, and blue is the GPIO pin that is toggled high before the ma...

User statistics

User Activity

STM32L072 slow start-up time

Re: STM32L072 slow start-up time

Re: STM32L072 slow start-up time

Re: STM32L072 slow start-up time

Re: STM32L072 slow start-up time