Hi Jun, [quote userid="587615" url="~/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1450988/mcu-plus-sdk-am243x-rbl-boot-from-flash/5569013#5569013"]"SBL Null" does not configure OSPI settings, as this responsibility lies with the RBL. After booting from SBL Null, the flash contents can be directly accessed through memory mapping. For example, if we put below code at the beginning of "SBL NULL": uint32_t *mem = ( uint32_t *)( 0x60000000 ); printf ( "%x" , *mem); This will print the contents of the flash-mapped memory. we can keep printing and dump everything. "printf("%x", mem[n])" you will find it is "SBL NULL "[/quote] That is correct understanding. Make sure to keep in mind, that whenever you are able to see the flash contents in SoC memory space starting from 0x60000000, it is because DAC is enabled, if DAC was disabled you would not be able to do so. The rest of the points are correct as well. I am marking it as TI Thinks resolved, thanks for writing a detailed explanation. Regards, Vaibhav
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