
| Ref.: |
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SpaceWire Router |
| UserManual | |
Issue: | 3.4 | ||
User Manual | |||
Date: | 11th July 2008 | ||
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7.2 PACKET PRIORITY
Each packet which is input to the router has an associated priority level, either as a result of the packet address or the internal routing table. Two priority levels HIGH and LOW are supported.
The table below defines the priority levels for packet addresses
Table 7-2 Packet Priority Mapping
Packet Address | Packet Priority | Physical Port type |
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0 | HIGH | Configuration port |
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1 | HIGH | SpaceWire link port 1 |
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2 | HIGH | SpaceWire link port 2 |
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3 | HIGH | SpaceWire link port 3 |
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4 | HIGH | SpaceWire link port 4 |
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5 | HIGH | SpaceWire link port 5 |
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6 | HIGH | SpaceWire link port 6 |
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7 | HIGH | SpaceWire link port 7 |
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8 | HIGH | SpaceWire link port 8 |
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9 | HIGH | External FIFO port 1 |
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10 | HIGH | External FIFO port 2 |
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N/A | Invalid addresses | |
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Dependent on routing table | Logical addresses | |
| - Default LOW |
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| - May be configured HIGH (see section |
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| 9.3) |
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7.3 PACKET HEADER DELETION
Header deletion is performed on packets dependent on the packet address. Packets which have path addresses or logical addresses which have the header deletion bit set in the routing table have the header address byte removed before the packet is routed to the destination.
The table below defines the header deletion settings for each address.
Preliminary | 53 |