SpaceWire
| Created by | European Space Agency |
|---|---|
| Speed | 2.0–400 Mbit/s |
| Style | Serial |
| Hotplugging interface | Yes |
| External interface | Yes |
| Type | Data connector | ||
|---|---|---|---|
| Designer | European Space Agency | ||
| Hot pluggable | Yes | ||
| External | Yes | ||
| Audio signal | No | ||
| Video signal | No | ||
| Pins | 9 | ||
| Connector | Micro-D | ||
| Data signal | Yes | ||
| Bitrate | 2.0–400 Mbit/s | ||
| Protocol | Serial | ||
| Pin | Name | Description | |
| Pin 1 | DIN+ | Data In Pos. | |
| Pin 2 | SIN+ | Strobe In Pos. | |
| Pin 3 | Inner Shield | Ground | |
| Pin 4 | SOUT- | Strobe Out Neg. | |
| Pin 5 | DOUT- | Data Out Neg. | |
| Pin 6 | DIN- | Data In Neg. | |
| Pin 7 | SIN- | Strobe In Neg. | |
| Pin 8 | SOUT+ | Strobe Out Pos. | |
| Pin 9 | DOUT+ | Data Out Pos. | |
SpaceWire is a spacecraft communication network based in part on the IEEE 1355 standard of communications. It is coordinated by the European Space Agency (ESA) in collaboration with international space agencies including NASA, JAXA and RKA.
Within a SpaceWire network the nodes are connected through low-cost, low-latency, full-duplex, point-to-point serial links and packet switching wormhole routing routers. SpaceWire covers two (physical and data-link) of the seven layers of the OSI model for communications.
SpaceWire's modulation and data formats generally follow the data strobe encoding - differential ended signaling (DS-DE) part of the IEEE Std 1355-1995. SpaceWire utilizes asynchronous communication and allows speeds between 2 Mbit/s and 400 Mbit/s. DS-DE is well-favored because it describes modulation, bit formats, routing, flow control and error detection in hardware, with little need for software. SpaceWire also has very low error rates, deterministic system behavior, and relatively simple digital electronics. SpaceWire replaced old PECL differential drivers in the physical layer of IEEE 1355 DS-DE by low-voltage differential signaling (LVDS). SpaceWire also proposes the use of space-qualified 9-pin connectors.
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