AVR-Chat

Finally said the heck with it and wrote
every SRAM manufacturer I could find an 
address for.


--- In AVR-Chat@yahoogroups.com, "poitsplace" <lmburt@e...> wrote:
> Here's what I don't get.  One of the most 
> important uses of SRAM and parallel EEPROM
> and Flash is as microcontroller memory.  If
> you'll look over the datasheets of MOST of 
> your simple MCU's you'll find something kind
> of important.  Almost all of them multiplex
> 8 bits of the address with the data lines.
> 
> I've taken apart lots of equipment and I 
> see that even manufacturers get stuck with
> the same BS that we do.  You'll usually 
> find a latch...interfacing to that memory.
> 
> CONSIDERING that the amount of space it would
> take to replicate that same latch on the die
> of a SRAM chip is smaller than a grain of 
> salt...why the hell hasn't someone pulled 
> their heads out of their posteriors long 
> enough to see that there's a very real NEED
> for a parallel SRAM, Flash and EEPROM with
> a multiplexed data/address bus???
> 
> Not only would this eliminate a whole chip
> from many projects and commercial circuit
> boards...it would cut down the size of the
> RAM chip as well.  One could easily fit
> up to 128k of SRAM on a 24pin chip
> VCC, VSS, ALE, DA0-7, A8-15 and one for
> either chip enable (on 64k chips) or bank
> select on 128k chips.
> 
> This is of course completely ignoring the
> idea of multiplexing all data and address
> lines (one of those would only have 16
> pins)
> 
> Ok, finished ranting