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# FMC 5-channel Digital I/O module
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## Functional specifications
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- 5 TTL-compatible I/Os.
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- Programmable 50-Ohm input termination in each channel.
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- External inputs need to be protected against +15V pulses with a
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pulse width of at least 10us @ 50Hz (with protection diodes if
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possible).
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- Need to withstand a continuous short-circuit on all the outputs at
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the same time.
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- Output standard: 50 Ohm TTL drivers (with 2V/ns or faster rising
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edges). At power-up the default output state is low, with no
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glitches.
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## Project Status
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<table>
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<tbody>
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<tr class="odd">
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<td><strong>Date</strong></td>
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<td><b> Event </b></td>
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</tr>
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<tr class="even">
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<td>27-05-2011</td>
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<td>Start of brainstorming.</td>
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</tr>
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</tbody>
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</table>
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### Files
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* [block_diagram.jpg](/uploads/2d0b0f455ea9fd3936c518b4d07a6173/block_diagram.jpg)
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* [dio-hw.pdf](/uploads/3c84b6d1b93468d14f3ffb883770a12e/dio-hw.pdf)
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* [photo_v2_small.jpg](/uploads/5c9dc77883dff05bd8cdc352ee220fc2/photo_v2_small.jpg) |
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