National Semiconductor Mass Storage Handbook
ard at p850ug1.demon.co.uk
Sun Jun 21 15:18:43 CDT 2009
> I have a datasheet for the DP8464 ( supposed to be similar to the 8468 ) and
That datasheet is on Datasheetarchive, so I'd got a pinout of that. The
8468 is similar in consept, but has more pins (I think it only came in a
PLCC package) and thus a diferent pinout
> a bunch of Application Notes for using that family of parts ( i.e. AN774,
> AN414, etc..). It would be helpful to know if it is a pulse detector, data
> separator or whatever function you think it might serve.
Thanks to Al Kossow, I've now seen all the datasheets (on bitsavers) and
know that, alas, none of them apply to the chip I am looking at. The
power and groudn pins don't agree, for example.
All I can tell you is that it's some kind of data encoder/decoder. The
Read and Write data signals, together with the Read and Write clock lines
go directly to it. I've not traced out enough to know more.
> I also have a datasheet for the AMD8751 / 8753 which are the EPROM versions
> of the factory mask ROM 8051 and 8053. The 8753 has 8 K of EPROM and same
> functionality as the 8051 / 8751 ( 4 K ROM / EPROM ).
If you've got the data sheets to hamd, can you check if it's the same
pinout as the 8051, please (it looks to be).
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