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<
TD-Linux>
why don't FPGA IOBs offer a synchronizer? it seems like it'd be a common use case
<
TD-Linux>
oh apparently 7 series does have this
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omnitechnomancer>
Do some of the DDR modes count?
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Lofty>
TD-Linux: one thing that comes to mind is that distributing the synchroniser allows for pretty lax internal timings
<
Lofty>
If it needs to get from pin A to gate B and B is on the other side of the chip, you can spread the routing delay across the flops
<
omnitechnomancer>
Makes one wonder why it would have placed gate B on the other side of the chip though
<
Lofty>
Because when you have all these flops, they could be closer to other more critical inputs
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<
TD-Linux>
I think you normally want synchronizer flops to be as close together as possible
<
TD-Linux>
but yeah also I suppose there isn't a huge benefit vs just normal flip flops
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mithro>
daveshah: I know that Dirk was looking into things like this
<
daveshah>
Yes, I think he made a DAC out of routing transistor short circuits
<
daveshah>
That was for measurement from outside the FPGA
<
daveshah>
But similar tricks might apply inside, too
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