Atmel SpaceWire Router SpW-10X User Manual

Ref.:   UoD_SpW-10X_ 

 

Issue:  3.4 

  

 

Date:  11

 

 

107

 

Address Range: 32-255 (0x0000 0020 – 0x0000 00FF) 

0 

RESERVED 

‘0’ 

Reserved bit – always set to zero. 

R 

10:1 REQUEST 

Undefined 
after power 
on. 

Unaltered 
by reset. 

The request bits determine which output ports 
the logical address will arbitrate for. When bit 
1 is set then SpaceWire port 1 will be 
requested. When bit 2 is set then SpaceWire 
port 2 will be accessed and so on.  

By setting more than one bit group adaptive 
routing can be used, allowing the input packet 
to arbitrate for more than one output port. 

If a write is performed and bits 10:1 are set to 
zero then the INVALID_ADDR bit will be set 
and all other bits will be set to zero 

Note: The configuration port (port 0) is not 
accessible through logical addresses. 

R/W 

28:11 NOT 

USED 

- 

- 

- 

29 DEL_HEAD  Undefined 

after power 
on. 

Unaltered 
by reset. 

Delete header: when set the leading header 
byte of the input packet will be removed 
before it is transferred to the output port. 

R/W 

30 PRIORITY 

Undefined 
after power 
on. 

Unaltered 
by reset. 

When a packet has a logical address with an 
entry in the priority filed of this register set, the 
packet will be granted access to a particular 
output port in preference to packets with 
priority bit set to zero. 

R/W 

31 

INVALID_ADDR ‘1’ 

When the Invalid Address bit is set it indicates 
that the corresponding logical address is 
invalid. In this case, any packets arriving at 
the router with an invalid address are spilt and 
an address error is reported in the port status 
register. 

R/W