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| Contents |
Contents |
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1.0 | Functional Overview | 5 | ||
| 1.1 | 21143 Overview | 5 | |
| 1.2 | Network Interface | 5 | |
| 1.3 | 6 | ||
| 1.4 | 6 | ||
2.0 | 21143 Ports | ..................................................................................................................................... | 7 | |
3.0 | Network Connection | 9 | ||
| 3.1 | 9 | ||
| 3.2 | 12 | ||
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| 3.2.1 | Internal Optional Daughtercard | 13 |
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| 3.2.2 Description of | 13 | |
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| 3.2.3 | 14 | |
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| 3.2.4 Description of | 14 | |
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| 3.2.5 | MII/SYM Pin Listing | 14 |
| 3.3 | AUI Network Port | 15 | |
| 3.4 | 18 | ||
4.0 | 21143 Requirements | 19 | ||
| 4.1 | Unused JTAG Port Requirements | 19 | |
| 4.2 | Current Reference and Capacitor Input Requirements | 19 | |
| 4.3 | Crystal and Crystal Oscillator Connections | 20 | |
5.0 Signal Routing and Placement | 21 | |||
| 5.1 | Ground and Power Planes | 21 | |
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| 5.1.1 3.3 V Power Supply | 22 | |
| 5.2 | LED Status Signals | 22 | |
6.0 | Design Considerations | 23 | ||
| 6.1 | Designing the Ethernet Corner on Motherboards | 23 | |
| 6.2 | Suggestions for FCC Compliance | 23 | |
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| 6.2.1 Suggestions for Quiet Ground and Power Planes | 23 | |
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| 6.2.2 | Suggestions for Routing | 24 |
Figures |
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1 | 6 | |||
2 | 7 | |||
3 | 10 | |||
4 | 11 | |||
5 | Minimum Components Required for | 12 | ||
6 | 13 | |||
7 | 14 | |||
8 AUI 10BASE5 Network and Pin Connections | 16 |
Design Guide | 3 |