K5synth

You read my other message, actually I'm now sure the 27SF512 is 
compatible with it :
-Greater voltage range than the 27C512(Made to replace the CMOS one)
-Tells it can replace the 27 UV eproms
-Has 27 and 512 in the name
-Better access time

The only problem is that the only not so cheap(32euros with the cheapest 
version, single sided board) programmer available DIY looks complicated 
to build(when not in kit) and the software is for advanced users(And 
even there, you'll need support).

g0ory@... a écrit:

> --- In k5synth@yahoogroups.com, "antdes45dragonmaster"
> <antdes45@n...> wrote:
> > I'd like some info about OS v1.3
> > First, is it a 27512 or a 27C512.
>
> It's a C in mine. The only difference is that the C is for CMOS, so
> it consumes less power in use. Both are interchangeable.
>
> > Second, can I use a 28(C)512 since it's an EEPROM, so I don't need
> an
> > UV SW light to erase it(And it appears that the EPROM slows down
> after
> > a couple of erasings)
>
> If the flash part has adress and data bus, R/W, CS and all the rest
> in the right place then it should be plug and play. The access-time
> is the only important issue. It shouldn't be any slower than the
> original EPROM. If it's faster, then it shouldn't be a problem - it
> just means the data is waiting on the data bus quicker.
>
> Point taken on your second message. The UV erase cycle needs to be
> precisely controlled, otherwise you get stuck bits, or flipped bits
> that refuse to program ever again. The other problem with UV proms is
> programming Voltage Vp which varies from Manufacturer to
> Manufacturer - some are 12V and some are 21V or in even older gear
> 25V programmable.
>
> Have fun
>
> Adam
>
>
>
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-- 
antdes45@...