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TMS320F28374D: How to program CPU2 flash through serial port SCI-A

Part Number: TMS320F28374D
Other Parts Discussed in Thread: C2000WARE

Tool/software:

Hello,

We are starting a new project with dual core C2000 (TMS320F28374D). According to datasheet and technical reference manual, it seems CPU1 cannot program CPU2 flash memory directly.
I thought CPU1 could program all memory areas and then command CPU2 to boot from an address.

We have an external MCU which updates the existing single core C2000 by first sending preloader to DSP RAM through serial port SCI-A.
After preloader has been sent, DSP boots from RAM and MCU sends rest of the program to DSP flash.

My question is, can I use the same process to update CPU2 through SCI-A port by using CPU1 to give SCI-A port ownership to CPU2 followed by reset?
Or do I have to send our preloader or full binary from CPU1 to CPU2 using IPC commands followed by command to boot CPU2 from RAM?

Best reagards,
JM