[sdiy] CPLD shield for arduino/AMANI 64/AMANI GT

[nvawter at media.mit.edu]

Heya!!

Glad you noticed- it took a lot of work.  49 was my estimate, but my  
first draft uses 56 of the cells.  Cutting it close!  It has not been  
simulated yet, because I need to learn how to simulate in Quartus.   
The two approaches I used are to compute the minimum accuracy needed  
and to organize the dividers into a tree of chains that have common  
divisors!

hmm checking out Silego programmable parts now.  interesting.  some  
nifty analog components inside those little devices, including an ADC.  
  They might not be so bad for DIY..  they have free development  
software for Win as well as OSX.  They also sell dev sockets.  And,  
they have lots of how-to videos and a $50 dev kit.  They haven have a  
design library for OrCad and Eagle!  Intriguing!

Did you end up solder-mounting your Silego DFNs?

Quoting Brock Russell <brockr0 at shaw.ca>:

> I'm kind of late picking up this thread but I have to ask, how do  
> you create a top octave generator with only 49 cells in a CPLD? The  
> Altera EPM3046A has one flip-flop per macro cell so it seems to me  
> you'd need two of these devices to generate 12 notes.
>
> I designed a few MK50240 clones a few months ago using 3 and 4  
> Silego SLG46400 Green PAK2 devices and some CD4504 level shifters.  
> It's actually possible to make a DIP sized plug in replacement. The  
> Silego parts aren't really DIY friendly as they are 2.5mm square 12  
> pin DFNs, but they are very cool devices containing a ton of  
> features in a 28 cent part.
>
> Brock
>
>
> At 08:27 AM 15/03/2012, nvawter at media.mit.edu wrote:
>> Oh, heck yeah!
>>
>> My friend and I are currently obsessed with recreating chromatic clock
>> divider chips.  I think a CPLD would be great for that.
>>
>> The Altera EPM5064 on that Arduino CPLD shield has 64 macrocells.  My
>> estimate for a single octave MK50240 clone is about 49 cells.
>>
>> anyone have any other ideas for MK50240 clones that are available in stock?
>>
>>
>>
>>
>> Quoting dan snazelle <subjectivity at hotmail.com>:
>>>
>>> are there any SYNTH DIY uses for a CPLD/programmable logic?
>>>
>>>
>>> http://majolsurf.net/wordpress/?page_id=368
>>>
>>>
>>>
>>>
>>> http://majolsurf.net/wordpress/?page_id=1663
>>>
>>>
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