[time-nuts] Kode 375-928 Display - Help!

Jason Rabel jason at extremeoverclocking.com
Thu May 24 00:10:56 UTC 2007


Interesting you would mention that! After my first post I pulled the board
with the connector and was looking at the traces from the DB-25. One of the
chips nearby is a SN75176AP which I found a PDF saying it is a differential
bus transceiver (RS422). I have a SBC that you can set the com port to
RS232/422/485, so that's one little hurdle overcome.

There's quite a few pins wired, at first I was comparing it with the RS232
DB-25 which most pins made sense. I should probably look up the others and
see how they differ and such (I'm clueless when it comes to RS422/485, so
I'll be googlin' tonight).

Jason

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Jack Hudler
Sent: Wednesday, May 23, 2007 6:54 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Kode 375-928 Display - Help!

It might be RS-485 and so multiple displaies could have its own address on a
multidrop setup. 
About the only trick there is finding out if its 2 or 4 wire 485 (probably 2
because of the address).
Think I've seen some USB to 485 converters on the market, but you might get
away with driving it with RS-232.
Go Google RS-485





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