Atmel SpW-10X user manual SpaceWire Router, User Manual, Preliminary

SpW-10X	Ref.:	UoD_SpW-10X_
SpaceWire Router		UserManual
	Issue:	3.4
User Manual
	Date:	11th July 2008

In Figure 7-5 the first byte received by the SpaceWire router configuration logic is the port address followed by the destination logical address. Fields which are depicted in bold text are expected values. Fields which are shaded are optional.

									First Byte Received
									Config Port Address
									00h
Destination Logical Address				Protocol Identifier			Packet Type, Command		Destination Key
		FEh			01h		Source Path Addr Len
Source Path Address				Source Path Address			Source Path Address		Source Path Address
Source Logical Address				Transaction Identifier (MS)			Transaction Identifier (LS)		Extended Read Address
									00h
Read Address (MS)				Read Address			Read Address		Read Address (LS)
		00h			00h
Data Length (MS)					Data Length		Data Length (LS)		Header CRC
		00h
EOP									Last Byte Received
Bits in Packet Type / Command / Source Path Address Length Byte
MSB											LSB
0			1	0		0	1	1	Source Path	Source Path
									Address Length	Address Length
	Packet Type					Command			Source Path Address Length

Figure 7-5 Read Incrementing Address Command Format

Table 7-9 Read Incrementing Address Command Packet Fields

Field	Description	Bytes
Config Port	The configuration port address field routes the packet to the configuration	1
Address	port of the router. The configuration port address is always present when
	configuring the SpaceWire Router.
Destination	The destination logical address is not used in the SpaceWire Router. The	1
Logical	SpaceWire router accepts packets which have the default destination logical
Address	address of 254h (FEh).
Protocol	The RMAP protocol identifier is 01h.	1
Identifier
Command	The command byte indicates a read incrementing packet. The Source path	1
Byte	address length fields are set to the number of source path addresses
	required as defined in section 7.6.9.

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