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

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

31 8 7 4 3 0

Device Type

Return Port

Ports in run state

Figure 9-4 Network Discovery Register Fields

Table 9-8 Network Discovery Register Fields

Bits	Description	Reset	Usage	Read/Write
		Value
3:0	Device Type	“0001”	The device type field indicates the type of device	R
			which is associated with this network discovery
			register. At present there is only one device type
			defined, the Router, along with the unknown device
			type.
			“0000” – Unknown Device
			“0001” – Router
7:4	Return Port	All bits	Indicates the input port number which accessed this	R
		set to	network discovery register.
		zero
31:8	Ports in Run	All bits	Indicates the SpaceWire ports which are in the run	R
	state	set to	state. Bit 8 corresponds to SpaceWire port 1.
		zero	The external ports are the highest numbered port and
			the corresponding register bits are set to one. In this
			way a network manager can determine the number of
			ports and the active ports in one register read.

9.5.2 Router Identity Register

The router identity register address is 257 (0x0000 0101).

The router identity register allows a network manager to assign a 32 bit ID to a SpaceWire router device by writing to this register. It may also be used for other purposes. The router identity register is described in Table 9-9.

Preliminary 116