Atmel SpaceWire Router SpW-10X - Manual (Page 74)

Ref.: UoD_SpW-10X_
UserManual
Issue: 3.4
SpW-10X
SpaceWire Router
User Manual Date: 11 th
July 2008
Preliminary
74
address
Transaction
Identifier
The transaction identifier identifies the command packet and reply packet with a
unique number. The transaction identifier in the reply packet is copied from the
command packet and returned in this field, so that the command and the
corresponding reply have the same transaction identifier value.
2
Header
CRC
The header CRC used to detect errors in the header part of the command
packet. See section 7.6.7 for CRC generation.
1
7.6.6 Command Error Response
A summary of the error conditions and the action taken is given in Table 7-17. The error conditions are
recorded in the configuration port status register.
Table 7-17 Configuration Port Errors Summary
Register Bits Description Reply
Packet
Returned As Returned
RMAP
Status
Code
Invalid Header
CRC The header CRC was invalid
therefore the header is
corrupted No No Reply Packet. -
Unsupported
Protocol Error The protocol byte is not the
RMAP protocol identifier No No Reply Packet. -
Source Logical
Address Error The source logical address is
invalid (outside the range
20h-FFh) No No Reply Packet. -
Source Path
Address
Sequence Error The source path address
sequence is invalid as
specified in section 7.6.9 No
No Reply Packet. -
Unused RMAP
command or
packet type The command code is an
unused command code or
the packet type is invalid. Yes Unused RMAP command
or packet type 2
Invalid
Destination Key The destination key in the
command packet is invalid. Yes Invalid Destination Key 3
Invalid Data
CRC The Data CRC is invalid
therefore the data part of the Yes Invalid Data CRC 4