STM32U5 B-U585I-IOT02A unable to connect to device after TrustZone example execution

[Domenico]

Hi,

I have run the example code STM32Cube_FW_U5_V1.1.1\Projects\B-U585I-IOT02A\Examples\GPIOGPIO_IOToggle_TrustZone and I can no longer connect to the B-U585I-IOT02A board via STM32CubeProgrammer to disable TrustZone. I have the ST-LINK error message (DEV_TARGET_NOT_HALTED).

Thank you

[Imen.D · Accepted solution]

Hello @Domenico​ 

Firstly, check your USB cable, connectors, and try connect in "under reset" mode.

Try boot on RSS : BOOT0 pin PH3 to VDD, as described in the AN5347.

Make sure to use latest release of CubeProgrammer.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Imen

[Domenico]

Hi @Imen DAHMEN​,

I solved the problem with boot on RSS.

Thanks