Colin,
I'm not very surprised that Microchip programmer don't works with your
serial eeprom.
I've bought a Pickit serial analyzer just to modify the address of a DAC,
MCP4728. Of course everything works except the ability of reprogramming the
device address. I've solved the problem with an Arduino uno and a software
downloaded from the web on which I had to modify here and there because
didn't work as well...:)

II suggest to take a look to the timings with a scope to see if worth the
struggle. Check the write protect, hold and chip enable signals as well.

good luck,
Vasile

On Thu, May 14, 2015 at 9:44 AM, cdb <colin@btech-online.co.uk> wrote:

>  At work we have purchased a PM3 programmer along with the required socke=
t
> modules in this case the AC164302 Universal SOIC module.
>
> I am having no success in trying to program an SST25VF032B eeprom (SPI), =
I
> am aware that Microchip recommend using the SST26 series.
>
> We have the 'gold' copies of EEPROMS and I have no difficulty in reading
> the contents and exporting the hex file to a folder on the PC. When I try
> to program a new out of tube SST25, th eimage is downloaded to the PM3 an=
d
> it programs and then fails on verification with the error
>
> Address 00000  Good 0009F Bad 0000FF.
>
> When I read back the contents of the failed  chip it bore no relation to
> the original contents.
>
> Original             programmed
> Address 000000 CF               9F
>                                                         BB
>       3D
>                                                         A3
>       F8
>
> from address 000000 07 onwards all remaining addresses are filled with
> alternating 9A 69.
>
> I've tried storing the hex file on SDCard and reading as a standalone wit=
h
> the same result, I've tried even reprogramming with the data in the
> incorrect result, which actually results in all memory containing 00.
>
> As we need this to repair bespoke obsolete main processor boards,I'd be
> grateful for any thoughts. There is no problem programming the 24 series =
of
> eeprom.
>
> Details of setup:
>
> PM3 version 10-00398-R8 ROHS compliant version - so I assume this means i=
t
> will program the SST range which earlier version that were not ROHS
> compliant wouldn't - source Microchip PM3 docs.
>
> The hex file is 11.522kB in size and co-incidentally so is the faulty fil=
e
> when read.
>
> Now we have had to 'bodge' the SOIC module as the SST chips are 200 mil
> SOIC and the module takes the 150 mil size, Therefore I have run a short
> ribbon cable about 40 -50 mm long to a spring loaded Microchip socket mea=
nt
> for their other programmers, Unlike the PM3 module(with passives installe=
d)
> these are just spring sockets on a dip board.
>
> I wonder if this cable could be causing a program problem even though it
> seems to read an EEPROM without any hastles.
>
> I have fiddled with the 'hold in reset' option on the PM3 and tried
> disabling chip ID etc, with no difference in outcome.
>
> The PC is an ancient Apex running XP 32 bit with 490MB RAM (we are only
> allowed to use obsolete PCs for this kind of thing).
>
> Many thanks
>
> Colin
>
>
>
>
> --
> cdb,  on 14/05/2015
>
>
>
>
>
>
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