Chapter 4 S a m p l e A p p l i c a t i o n : T T L S i g n a l s t o E I A - 2 3 2
The following figure is an example of how to convert the Digi One EM signals to normal serial voltage levels.
CONNECTOR |
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P1 |
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| DB9 |
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| 10 SHIELD | 11 SHIELD |
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1 | 2 | 3 | 4 | 5 | 6 7 | 8 | 9 | GND |
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| GND |
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| 0.1uF | C3 | 0.1uF |
+5V |
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1 | C5 | 2 | GND |
4TX |
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| 17 | 9 | 4 | 27 | 23 | 18 | 2 | 3 | 1 | 28 | 25 |
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RECVR 5RX | U1 |
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| ADM211E |
| 12 | 14 | 15 16 | 8 | 5 | 26 | 22 | 19 | 7 | 6 | 20 | 21 | 24 | GND | |
C6 | 1 | 0.1uF | 2 |
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C4 | 1 | 0.1uF | 2 |
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| +5V |
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| ONE EM CONNECTOR | P6 | 1 2 | 3 4 | 5 6 | 7 8 | 9 10 | 11 12 | SOCKET 2X6 |
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| DIGI |
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| 3 4 |
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SW1 | RESET SWITCH |
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| GND |
| 1 | 2 | 3 | GND |
| 1 2 |
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| P5 |
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| GND |
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| HEADER |
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| RESERVED |
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Digi One EM Hardware Reference | 19 |
