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FEber.1
Associate II
since ‎2021-06-08
‎2024-08-27

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STM32L052 - RTC with implausible or Zero - Content after RESET due to leaving the standby mode by recognizing of level LOW on RTC-TAMP1 (PC13)

2021-11-05
The tamper contact RTC.TAMP1 on PC13 is used for entering and leaving the standby modus in tamper - level - detection - mode. The detection of low level on RTC-TAMP1 finishes the standby mode and restarts the controller. That is all OK. but in about ...

STM32L0+: The RTC-Wake-Up_timer with __WFE()-sleep-entry delivers two wake ups instead of one wake up. And this consumes more power then needed.

2021-09-02
__WFI():  (Wake up by Interrupt):leads to a one wake up as expected but swallows some interrupts if more interrupt sources are simultaneously produce interrupts. The understanding of this behavior costed me a lot of time.       __WFE():  (Wake up by ...

STM32L052 USART: Problem Switchover from Output- to UART - TX - functionality produces a disturbing H/L - edge on TX

2021-08-13
Two Usart - TX - lines shall be used either in PP- output- or in Usart - TX - mode.The switchover from a normal output pin to a Uart - TX - pin produces an High/ Low edge on TX followed by an interrupt on TX side.On RX- side this H/L edge causes an ...
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