SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
The proxy completes a message when the completion byte is accessed. This completion byte is the final byte in the full size of the message. This byte can be written by any size access, whether byte, 32-bit, or 64-bit word. The write of a message is not complete until this final byte of the message is written, and only then will the message be sent to the target. The read of a message is not complete until this final byte of the message is read by the host, and only then will reading a new message be allowed. Even if the final byte of the message is not needed, it must be accessed to complete the message inside the proxy hardware.