Atmel SpaceWire Router SpW-10X User Manual

Ref.:   UoD_SpW-10X_ 

 

Issue:  3.4 

  

 

Date:  11

 

 

64

 

In Figure 7-6 the format of the reply to a read incrementing address command is illustrated. The first 
byte sent by the SpaceWire router configuration logic is the port address followed by the destination 
logical address. Fields which are depicted in bold text are expected values. Fields which are shaded 
are optional. Note that the reply is always sent out of the same port as the command was received on. 
The Source Path Address should not include the output port of the router being commanded as the 
reply will be automatically sent out of the same port that the command arrived on. See section 7.6.8. 

Source Path Address

Source Logical Address

Packet Type, Command,

Source Path Addr Len

Status

Transaction Identifier (MS)

Transaction Identifier (LS)

Data Length

Data Length (LS)

Header CRC

Data (Word 0 MSB)

Data

Data

Data (Word 0 LSB)

Source Path Address

Source Path Address

Data (Word 1 MSB)

Data

Data

Data (Word 1 LSB)

Data CRC

Bits in Packet Type / Command / Source Address Path Length Byte

MSB

Packet Type

Command

Source Path

Address Length

Source Path

Address Length

LSB

Source Path Address Length

Data (Word n MSB)

Data

Data

Data (Word n LSB)

Data (Word n-1 MSB)

Data

Data

Data (Word n-1 LSB)

 

 

Source 

Path 

Address  

Optional source path addresses specified in the command packet. If no source 

path addresses are specified then the first byte will be the source logical 

address. 

0-12 

Source 

Logical 

Address  

The source logical address specified in the command packet. If source path 

addresses are not used then the source logical address is the address of the 

return packet. 

1 

Protocol 

Identifier  

The RMAP protocol identifier value 01h. 

1