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FMC DIO 5ch TTL a
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  • #19

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Opened Feb 15, 2019 by Luigi Calligaris@luigi.calligaris
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IN/OUT labels between schematics and hardware note are inconsistent

In the dio_hw.pdf hardware note,

Figure 3.1

in Figure 3.1 the input comparator is shown to be driving the DIFF_IN signals, and the output buffer is shown to be driven by the DIFF_OUT differential signals. This is probably the most sensible assignment from the point of view of the function the device is going to play: to output a signal into the LEMO connector or to receive an input signal from the LEMO connector.

In the EDA-02408-V2-0 schematics, instead,

schematics

the input comparator is driving the OUTXY_P/OUT_XY_N differential signals, and the output buffer is shown to be driven by the INXY_P/IN_XY_N. This latter signal assignment is, further, inconsistent with the output enable negation signals (OEXY_N) that enable the output buffer.

Edited Feb 15, 2019 by Ghost User
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Reference: project/fmc-dio-5chttla#19