SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
Bit 26, this field indicates that the descriptor is a direct command or indirect command. A direct command means that the payload is contiguous with the descriptor and will be pulled in by the list manager descriptor control as it processes the list. A direct payload must end on or before a 256 byte boundary in the list. An indirect command is when the Address is located in Word2 is a pointer to the data payload. A DMA transaction will be scheduled to bring the payload into the List Manager to allow for the payload to be sent to the destination.