Eads Astrium SMCS332SpW User Manual page 6

Interface between three spacewire links
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13.3
Service Specification....................................................................................................................................... 115
13.3.1
Transport of data between two nodes...................................................................................................... 115
13.3.2
Execution of control commands.............................................................................................................. 116
13.3.2.1
Simple Control Commands ............................................................................................................. 116
13.3.2.2
Complex Control Commands.......................................................................................................... 117
13.4
Procedure Rules.............................................................................................................................................. 118
13.4.1
Acknowledgements................................................................................................................................. 118
13.4.2
Access to Command Signal Output Ports ............................................................................................... 119
13.4.3
Safety Critical Commands ...................................................................................................................... 119
13.4.4
Reset Commands .................................................................................................................................... 120
13.4.5
Shutdown Link Channel Operation / Restart Link Channel Operation ................................................... 121
13.4.6
Read of Link Interface Status Register ................................................................................................... 121
13.5
Encoding (Format) of Transactions................................................................................................................ 122
13.5.1
Header and EOP Coding ......................................................................................................................... 122
13.5.2
Control Word Coding Specification........................................................................................................ 122
13.5.3
Link Interface Status Register Encoding................................................................................................. 124
13.5.4
Data Transfer Type Transactions ............................................................................................................ 125
13.5.5
Read Link Interface Status Register Transaction .................................................................................... 126
13.5.6
Enable Command Execution Transaction ............................................................................................... 127
13.5.7
Critical Simple Command Execution Transaction .................................................................................. 128
13.6
Glossary.......................................................................................................................................................... 129
14 Differences between the SMCS332SpW and the old SMCS332........................................................................ 130
14.1
Summary of changed/modified/added registers or register bits...................................................................... 130
14.2
Pin Modifications............................................................................................................................................ 131
SMCS332SpW
User Manual
- All Rights Reserved - Copyright per DIN 34 -
EADS Astrium GmbH, ASE2
Doc No: SMCS_ASTD_UM_100
Issue:
1.4
Updated: 9-Sep-2006
Page:
6 of 131

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