I'm thinking of just using a couple 8 bit serial in parallel out
shift registers to drive address (and maybe control lines) of the SRAM,
and using 8 bits of I/O on the PIC.  Serializing the address lines could
save a lot of pins.  Tristating the data lines could allow them to be
used for some other purposes (reading switches through resistors or
something like that).
        A serial SRAM would sure be nice!  EDN ran a special section on
SRAMs in a recent edition, but did not mention serial SRAMs.  I wrote the
author.  He replied that he thought the die size of a large SRAM (say 32
Kbyte) was too large to fit in a small package (like maybe 8 pin DIP), so
they needed the larger package and just used the pins that came with the
larger package.  I don't really mind the larger pacakge, I just don't
want to use all my PIC pins!


Harold




Harold Hallikainen
harold@hallikainen.com
Hallikainen & Friends, Inc.
See the FCC Rules at http://hallikainen.com/FccRules and comments filed
in LPFM proceeding at http://hallikainen.com/lpfm


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