 Hello, everyone. My name is Manuel Barrera and I'm a ST Microelectronics Field Application Engineer. Today I'll be demonstrating how to disable TRUSOM on the STM32U5 Discovery Kit using STM32Q programmer. These steps are very particular and need to be followed closely, otherwise you run the risk of breaking your board. First, you need to ensure that you have a TRUSOM-enabled project running on your board. And for this example, I'll be using the U5 Azure RTOS example project loaded with TRUSOM-enabled. To verify this, I'll open up my terminal emulator, select the correct port, reset my board, and I can see that I have a TRUSOM-enabled project running and loaded onto the board. Next, we can open up Qt Programmer and we have to verify the version. In order for this to work, you'll need STM32Q programmer version 2.8.0 or greater. Once we're certain that we have a TRUSOM-enabled project loaded and running on our STM32U5 Discovery Kit, we can connect to the board with SWD and hot plug mode enabled. We'll navigate to Option Bites and then Readout Protection and we'll change this Readout Protection level to Level 1, DC. We have to be certain that we're selecting Level 1, DC, and not CC or 5.5 because that can result in a bricking of our board. So we'll select DC and click Apply. OK and OK. And next, we'll disconnect from our board and power cycle by unplugging and repugging the micro USB ST link. Next, we'll reconnect to our board and STM32Q programmer with SWD and hot plug mode selected. We'll navigate back to Readout Protection and revert back to Level 0, AA. But before selecting Apply, we'll also navigate to User Configuration and Disable TRUSOM. It's extremely important that you revert back to Level AA and also disable TRUSOM in the same step before selecting Apply. Now that we've selected Apply and we see Option Bites successfully programmed, we have successfully disabled TRUSOM.