[Fpga-synth] FPGA_MIDI_RCVR.gif correct?

[Scott Gravenhorst]

AHHHHHH!!!!!!!

Thanks for finding that.  The pin number labels on the right side of the chip are
reversed.  If the pins are relabeled properly, no other change needs to be made.  If you
fix the right side, you'll see that the schematic makes sense.

I will get the zip files fix sometime today, but right now, my diabetes wants to go for
a walk...


"The making of synthesizers in FPGAs." wrote:
>
>I just noticed something that look strange in the schematics of the file
>FPGA_MIDI_RCVR.gif that is included in all monosynth_000x.zip that is
>located in the WIKI.
>
>For me it looks like the pin-enumeration for the right side of the 6N138 is
>incorrect.
>This is what I get when looking at a datapaper for a 6N138 or in my case a
>pin-compatible surface-mounted HCPL0700:
>
>1 **OO**  8
>2 **OO**  7
>3 **OO**  6
>4 **OO**  5
>
>And by looking at the supplied GIF-file it says:
>
>1 **OO**  5
>2 **OO**  6
>3 **OO**  7
>4 **OO**  8
>
>It would be nice if somebody else can recheck this and post to the list and
>maybe we can fix this matter so that coming constructions work better than
>mine! :-)
>
>But it is probably an easy fix for me as long as the circuit didn't release
>its smoke.. :-) A removed/lifted pin 7 and a small strap between pad 6 and
>7.. because I actually found the bug earlier but still mixed up pin 6 and
>7..

-- ScottG

-------------------------------------------------------------

-- Scott Gravenhorst
-- GateMan I - Xilinx Spartan-3E Based MIDI Synthesizer
-- FatMan: home1.gte.net/res0658s/fatman/
-- NonFatMan: home1.gte.net/res0658s/electronics/
-- When the going gets tough, the tough use the command line.