About MJung.6.279

MJung.6.279 · 2021-02-23

DS9826 states that "The VDDIO2 supply is monitored and compared with the internal reference voltage (VREFINT). When the VDDIO2 is below this threshold, all the I/Os supplied from this rail are disabled by hardware. The output of this comparator is co...

MJung.6.279 · 2021-02-08

Hello,I am trying to do a proof-of-concept running the Apache NuttX RTOS on the ST32L562E-DK board as the non-secure application with TrustedFirmware-M.I can build, sign and flash NuttX as the non-secure application and TF-M boots into the RTOS initi...

MJung.6.279 · 2021-02-23

Hi Jan,you are probably right. (The comment about STM32F09x is for SYSCFG_ITLINE0, not for SYSCFG_ITLINE1.) I will give it a try.> Btw., couldn't a pulled-up unconnected input pin within the VDDIO2 ring be used for the required indication?That might ...

MJung.6.279 · 2021-02-23

Hi Jan,thanks for your reply. Unfortunately the SYSCFG_ITLINE1.VDDIO2 seems only to be available only on STM32F09x, but not on the STM32F072xx devices.Bye, Michael

MJung.6.279 · 2021-02-08

I figured it out: The RTOS uses SVCs while interrupts are disabled, which causes HardFaults. It then detects this situation in the HardFault handler and actually forwards execution to the SVCall handler.With standard settings the HardFault handler wi...

User statistics

User Activity

STM32F072xx - How to detect VDDIO2 presence?

SVC call from non-secure code does not trigger non-secure SVC exception

Re: STM32F072xx - How to detect VDDIO2 presence?

Re: STM32F072xx - How to detect VDDIO2 presence?

Re: SVC call from non-secure code does not trigger non-secure SVC exception