Foreground Secure Boot Flag HSM2HTF.0 is set by HSM BOS or HSM User Code

[User9635]

Hello Support,

With SSWWAIT=1, there is Foreground Secure Boot feature enabled in HSM.
Looks like Host SSW Software will check for HSM2HTF.0 as 1 before jumping from Host SSW to Host User Code.
During background secure boot [SSWWAIT=0], HSM2HTF.0=1 is done by HSM BOS Code [HSM ROM Code] unconditionally.
Question is during foreground secure boot [SSWWAIT=1], which code set HSM2HTF.0? Is it done by HSM User Code and never done by HSM BOS Code?
I am assuming yes.
Please confirm.

Best Regards

[Harvey]

Yes, your assumption is right.

After finish HSM BOS code, secure boot operation can be started in HSM user code.
In the HSM user code, HSM2HTF value is configured after finish secure boot operation

[User9635]

Hello Support,
In the attached HSM BOS Code Flowchart, I am unable to find the step where HSM2HTF.0=1 for SSWWAIT=0 [Background Secure Boot] is being done.
Can you please provide me a better flowchart of HSM BOS Code where SSWWAIT=0 condition is checked and HSM2HTF.0=1 being set is also shown?

Best Regards

[Harvey]

Sorry to say that we don't provide additional flowchart.

As you checked from manual, already explained how can MCU operate based on SSWWAIT value.