On my project it is desired to be able to use software controlled updates for CPU1 and CM. Originally I pursued the possibilities afforded by the app note SPRACN1. This seemed to have potential. However now I find that it is desired that the downloads are to come in on a RS-485 link. But our board uses level shifters to connect RS-485 to CM UART A instead of connecting to an SCI. Looking at Table 5-8 in the TRM there is not an SCI boot mode for the CM.
Would the RAM boot mode provide a possible path?
I think the correct/simpler solution would be to connect the RS-485 level shifters to the default SCI. I think hat would allow CPU1 to reboot and update via SCI.
What is the best method for firmware update for the CM?
Any guidance would be much appreciated.
John
