tokens: The initiator user application shall pass the following information to the initiator : 1 . Target SpaceWire Address 2 . Target Logical Address 3 . Read - modify - write command options 4 . Key 5 . Reply Address 6 . Initiator Logical Address 7 . Transaction Identifier 8 . Extended Address 9 . Memory address 10 . Data Length 11 . Data 12 . Mask