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Re: Mystery card?
a2aviator@gmail.com wrote:
On Jun 22, 12:36 am, "Michael J. Mahon" <mjma...@aol.com> wrote:
Look up the SED 1351 LCD controller--it drives a "skinny parallel"
LCD interface with 8 wires--using exactly the pins that are connected
to the RJ-45.
This is an SED1341, not 1351 - 1341 takes RGB and separated sync, 1351
is a graphic level device that takes data from the bus.
I'm willing to bet that they are very similar in their supported
interfaces and pinouts. (And, as I noted earlier, I couldn't easily
find a datasheet on the '1341, but the '1351 showed up and appeared
"close enough for government work". ;-)
More interesting - though.. how do you see "exactly" where those run,
where we only have one side of the PCB and with what we can see, if
the O.J. case were using this as a path to the crime, he'd have been
scot-free months earlier.
I just compared the controller chip pinout with the places where
the traces going to the ribbon cable wind up. That makes it pretty
clear what the functions of the fairly large wads of wires must be.
That PCB looks almost dark enough to me that it could even be a
multilayer PCB, though there's no real evidence of it except for the
darker hue to it on both the non-masked edge connector area and the
areas where there is no land coverage and no depth indicators that I
can see. But the lack of many vias other than the through-hole
components and those areas that look like berg headers..
That's certainly possible...but probably not. I chalked the darker
color up to choice of solder mask.
-michael
AppleCrate: An Apple II "blade server"!
Home page: http://members.aol.com/MJMahon/
"The wastebasket is our most important design
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