os fault when application wake up in s32k312

[EddiePark]

after setting Secure Boot, the FBL moves normally without issue when the power is turned off and then turned on.

But after Sleep in application, An OS fault occurs in fbl during wakeup using CAN.

It seems that reset happens and fbl starts after application change sleep status to wake-up status.

at this time, is secure- boot runs when application wake up?

Could you please let me know what is problem?

BRs.

Eddie Park

[lukaszadrapa · Accepted solution]

Hi @EddiePark 

if we are talking about normal exit form normal standby mode, the secure boot is executed. In case of from fast standby mode, the security functions are disabled, SBAF halts the HSE CPU. You can check following figures in the S32K3 RM:
Figure 136, page 1172
Figure 176, page 1653

If we are talking about ARM core sleep mode, the rest of the device is still running, there's no reason to run secure boot.

Regards,
Lukas