> Date:    Sat, 15 May 1999 04:49:48 +0200
> From:    Leo TImmer <salsater@DDS.NL>
> Subject: Re: [OT] Which EEPROM with 12C509?
>
> there is such a big market. My only problem at this time is that i don't
> know anything about the chip. I bought a 1MB/15 blocks (i suppose that they
> are 16 blocks, but use one for the directory). This card has a 64plcc chip
> from Sony type is: CXD8732Q or maybe 5D61 8BML. Looked on the sony site but
> couldn't find it, not even at the obsolete parts list. The size of the pcb

Couldn't find any direct info on the chip itself, but I found some specs
for the interface, after a short search on Altavista :

http://stekt.oulu.fi/~flame/hware/ps-e.txt

Of course unofficial, would Sony ever release that information? :)
Anyway the transactions seem a bit complicated, but I think it could fit on
a PIC anyway. It would appear that one "block" is 8 kilobytes, so that "1 MB"
is actually 1 Mb, i.e. one mega-bit, not byte. But still 128 kB would be nice.
Although, I think that it could very well be easier to take a normal Flash
memory chip and kludge that onto a larger PIC like 16F84, with all the
addressing etc. As a bonus, it will be larger :)