Atmel SpaceWire Router SpW-10X User Manual

Ref.:   UoD_SpW-10X_ 

 

Issue:  3.4 

  

 

Date:  11

 

 

54

 

0 Enabled 

Configuration 

port 

1 

Enabled 

SpaceWire link port 1 

2 

Enabled 

SpaceWire link port 2 

3 

Enabled 

SpaceWire link port 3 

4 

Enabled 

SpaceWire link port 4 

5 

Enabled 

SpaceWire link port 5 

6 

Enabled 

SpaceWire link port 6 

7 

Enabled 

SpaceWire link port 7 

8 

Enabled 

SpaceWire link port 8 

9 

Enabled 

External FIFO port 1 

10 

Enabled 

External FIFO port 2 

11-31 N/A 

Invalid 

addresses 

32-255 

Dependent on routing table (default not 
enabled) 

Logical addresses 

 

Note that header deletion is always enabled for path addresses and cannot be changed by 
configuration. Header deletion for logical addresses can be enabled or disabled via a configuration 
register (see section 9.3). 

7.4 INVALID ADDRESSES 

Packets which have invalid addresses are discarded by the routing control logic.  Path addresses 
which are in the range 11-31, logical addresses which are set as invalid in the routing table and empty 
packets (packets with no address or cargo) input to the external port are flagged as invalid packet 
addresses. 

A packet address error is also generated when a packet address causes the packet to be routed back 
through the port on which the packet was received, i.e. a loop-back, and the router control register bit 
address self is not enabled. 

When an invalid address packet is received by the router then the routing control logic flags the error 
to the corresponding port status register, spills the packet address, data and end of packet marker and 
waits for the next packet.