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

Table 7-6 Read Single 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 (00h) is always present
	when configuring the SpaceWire Router.
Destination	The destination logical address field is not used in the SpaceWire Router.	1
Logical	The SpaceWire router accepts packets which have the default destination
Address	logical address of 254h (FEh).
Protocol	The RMAP protocol identifier is 01h.	1
Identifier
Command	The command byte indicates a read single address 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.
Destination	The destination key identifier must match the contents of the destination key	1
Key	register, see section 9.5.10. The default (power-on) destination key is 20h.
Source	The source path address field is used to add source path addresses to the	0,4,8,12
Path	head of the reply packet. The expected number of source path addresses is
Address	specified in the command byte. See section 7.6.9 for source path address
	decoding.
Source	The source logical address should be set to the logical address of the node	1
Logical	which sent the command.
Address
Transaction	The transaction identifier identifies the command packet and reply packet	2
Identifier	with a unique number.
Extended	The extended read address is not used in the SpaceWire router and shall	1
Read	always be set to zero.
Address
Read	The read address identifies the register address to read from. The valid read	4
Address	addresses are defined in section 9.
Data	The data length of a read single address command shall be set to 4 to read	3
	Preliminary	58