Atmel SpW-10X User Applications, Stand-Alone Router, SpaceWire Router, User Manual, Preliminary

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

2. USER APPLICATIONS

The SpW-10X SpaceWire router device may be used in several different ways as described in the following sub-sections.

Note: SpW-10X is pronounced “SpaceWire Ten X”. This name derives from the abbreviation for SpaceWire (SpW), the fact that the router has eight SpaceWire ports and two external ports giving ten ports in total, and the used of “X” to represent a cross-bar switch.

2.1 STAND-ALONE ROUTER

The SpaceWire Router may be used as a stand-alone router with up to eight SpaceWire links connected to it. Configuration of the routing tables etc. may be done by sending SpaceWire packets containing configuration commands to the router.

SpaceWire Links

Instrument

1

SpW‐10X

Router

Instrument

2

Instrument

3

Memory

Unit

Instrument	Processor
4

Figure 2-1 Stand-Alone Router

In Figure 2-1 an example of use of the SpW-10X device as a stand-alone router is illustrated. There are four instruments connected to the SpW-10X device along with a memory unit and processor. The processor can communicate with all the instruments and memory unit to control them and is also able to configure the SpW-10X device. The instruments can send data to the memory unit for storage or to the processor for immediate processing. The processor can also read data from the memory for later processing, writing the processed data back into memory. A pair of SpW-10X devices can be used to provide a redundant configuration.

Preliminary 16