K5synth

--- 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