40pin-6 board

tooly · Post by **tooly** » Thu Aug 08, 2013 9:02 pm

is there one prefer mpupin for input i can use?

Post by **Fred** » Thu Aug 08, 2013 9:17 pm

What sort of input?

tooly · Post by **tooly** » Fri Aug 09, 2013 7:04 am

Fred wrote:Are you going to send me a blank board when you have them made?

of course i will send you a circus board

Fred wrote:What sort of input?

an input for maybe in future launchcontrol or something else

Post by **Fred** » Fri Aug 09, 2013 9:18 am

Should be any free pin. Advised pins are those with least use. One of the port A pins, perhaps? Or another PWM pin (for interrupt capability)? Or whatever is easiest to route to? Or an analogue pin, which can be used as digital inputs too? Choose one and I'll OK it :-)

Post by **Fred** » Fri Aug 09, 2013 9:19 am

I mean, typically so far any pin used for GP output is configured like this:

address of port
bit mask of pin

So literally any pin can be used for outputs, inputs will be the same way.

Fred.

tooly · Post by **tooly** » Fri Aug 09, 2013 10:31 am

i think its done

attached the eagle files

Post by **Fred** » Fri Aug 09, 2013 10:55 am

PDF for the rest of us, please?

tooly · Post by **tooly** » Fri Aug 09, 2013 12:12 pm

Fred wrote:PDF for the rest of us, please?

ok

Post by **Fred** » Fri Aug 09, 2013 1:33 pm

Max chip still not triple decoupled. This IS important, the max chip clamps it's inputs through the power supply pins, so they are decoupled to protect the CPU, not to protect the max chip.

Good choice of pin for input.

Take a look at max chip schem in Jaguar, and read the notes, there are limitations of simple topologies here too. It's OK as is, but could be better with more parts, however maybe that's not what you need. Reference: viewtopic.php?f=9&t=1675

Looking OK. Final check by Dan and Andy before going to be made would be wise. I'll email them.

Could you also donate me the parts to populate it? Or I can pay you and you order them? I don't mind assembling/soldering it myself, but have none of that stuff on hand AFAIK.

Fred.

tooly · Post by **tooly** » Sat Aug 10, 2013 8:34 am

Fred wrote:Max chip still not triple decoupled. This IS important, the max chip clamps it's inputs through the power supply pins, so they are decoupled to protect the CPU, not to protect the max chip.

you are meaning 10n?

Fred wrote:Looking OK. Final check by Dan and Andy before going to be made would be wise. I'll email them.

ok
i will wait

Fred wrote:Could you also donate me the parts to populate it? Or I can pay you and you order them? I don't mind assembling/soldering it myself, but have none of that stuff on hand AFAIK.

i think i could handle this

another question:
is it possible to use a cj125 ic in future?

thomas

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