[sdiy] using 6264 Ram

[Jerry Gray-Eskue]

-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl]On Behalf Of Dan Snazelle
Sent: Tuesday, June 16, 2009 10:19 AM
To: synth1 at airmail.net; sdiy
Subject: RE: [sdiy] using 6264 Ram



ok

Dan,

If you just want something to put in between an 8 bit a2d and d2a converter
to Buffer the (One Byte = Eight Bits at a time) data look at a 74HCT573,
this is one of my favorite chips to do this sort of thing because all 8
inputs are on one side and all 8 outputs are on the Other side, it lays out
on a PCB very nicely.

The 74HCT573 can be thought of as a Dual Port Ram Single Memory location as
it has one 8 bit data latch inside and accepts Input (a new Byte) while
still Outputting the previous byte.

You will find the Truth Table for this part to be much simpler than the
Timing Diagrams of the Static Ram.

If you are tiring to do a Digital Delay or some other device that takes
multiple data samples saved in between the converters it is going to get
rather complicated and is usually done with a micro controller or
microprocessor the reduce complexity and cost.

- Jerry


i am understand this a lot better now.
however

the fact that the I/O pins are reading or writing depending on the state
makes it a bit more complicated.

i should really try to find a schematic that uses this chip or something
similar so I can see how to route the signal to be stored and the signal to
be read or heard

i am assuming i cant just hook both up to the same pin...

can anyone recommend a schematic that uses SRAM chips?

thanks so much




----------------------------------------
> From: synth1 at airmail.net
> To: synth1 at airmail.net; synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] using 6264 Ram
> Date: Tue, 16 Jun 2009 09:58:00 -0500
> CC:
>
>> d) There is probably a /WE (Write Enable, active low) or sometimes it's
>> called R/~W (Read/not WRITE) which is an input that tells the chip if you
>> want to READ to WRITE
>>
>
>
> Errr...that should say READ (logic '1') or WRITE (logic '0').
>
> Paul S.
>
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