2.4.1 Idle Boot

If the MSS is not configured (for example, blank device), then the MSS Core Complex executes a boot ROM program, which holds all the processors in an infinite loop until a debugger connects to the target. The boot vector registers maintain their value until the device is reset or a new boot mode configuration is programmed. For configured devices, this mode is implemented by the System Controller using the U_MSS_BOOTMODE=0 boot option.

Important: In this mode, U_MSS_BOOTCFG is not used.

The following figure shows the Idle boot flow.

Figure 2-23. Idle Boot Flow