About tomasf

tomasf · 2019-06-10

Hi Everybody,I have an issue with STM32L433CCU6, when it's entering or exiting STOP 1 mode at temperatures from -36dC to -29dC uP completely freezesBasic overview of program:watchdog is set to 25 secondsclock: HSE 8MHz -> PLL 16MHz (SYSCLK) -> /2 -> ...

tomasf · 2019-10-28

Thanks you all for helpful advice. My problem was hardware related. I found that uP doesn't work even directly with HSE with some crystals and room temperatures. I ran successfully same setup on another design ( same L4 and crystal ) without error, M...

tomasf · 2019-06-10

Hi,thank you for your interest. The HSE is monitored with Clock Security System and in the case of HSE failure MSI clock starts and software tries to recover HSE. Even if HSE fails, chip should be able to be reset with NRST, communicate through SWD ...

tomasf · 2019-06-10

Hi,I used in first test Cryostat and in several other tests Climatic chamber. Temperature slope in first case was about -1dC / 2 minutes and in second case it was about -1 dC / 1 minute. I always wait for complete settlement of temperature. Tomas

tomasf · 2019-06-10

Hi Hal,thank you for joining. Yes that is true, all ICs used in design have -40 dC rating. ST declares that operating conditions are from -40 dC, that should mean it includes all low power modes. I have very good experience with STM32L151CBU6A which ...

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STM32L4 Freezes At Freezing Temperatures

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Re: STM32L4 Freezes At Freezing Temperatures