Atmel SpaceWire Router SpW-10X 사용자 설명서

Ref.:   UoD_SpW-10X_ 

 

Issue:  3.4 

  

 

Date:  11

 

 

72

 

Command 

Byte  

The command byte indicates a write single address, with verification and 

acknowledgement packet. The Source path address length fields are set to 

the number of source path addresses required as defined in section 7.6.9. 

1 

Destination 

Key  

The destination key identifier must match the contents of the destination key 

register, see section 9.5.10. 

1 

Source 

Path 

Address  

The source path address field is used to add source path addresses to the 

head of the reply packet. The expected number of source path addresses is 

specified in the command byte. See section 7.6.9 for source path address 

decoding. 

0,4,8,12

Source 

Logical 

Address  

The source logical address should be set to the logical address of the node 

which sent the command. 

1 

Transaction 

Identifier  

The transaction identifier identifies the command packet and reply packet 

with a unique number. 

2 

Extended 

Write 

Address 

The extended write address is not used in the SpaceWire router and is 

always expected to be zero. 

1 

Write 

Address 

The write address identifies the register to write the RMAP data. The valid 

write addresses are defined in section 9. 

4 

Data 

Length  

The data length of a write single address command is expected to be 4 bytes, 

to write to a 32 bit register location 

3 

Header 

CRC  

The header CRC is the eight bit CRC code used to detect errors in the 

command packet. The CRC code is checked before the command is 

executed 

1 

Data 

The 32 bit data value to write to the SpaceWire router register. 

4 

Data CRC  

The data CRC used to detect errors in the data part of the command packet. 

1