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Programming EPC4 flash devices

  • Thread starter Jeroen Belleman
  • Start date
J

Jeroen Belleman

Jan 1, 1970
0
There's a bit of a stir around here about problems trying to
program EPC4 flash memory devices over JTAG. Apparently,
these things have either Sharp (A-suffix) or Intel (C-suffix)
chips inside, and the latter refuse to be programmed.

Oddly enough, EPC16 devices of either origin program just fine.

Anyone here knows more?

Thanks,
Jeroen Belleman
 
B

Ben Jackson

Jan 1, 1970
0
There's a bit of a stir around here about problems trying to
program EPC4 flash memory devices over JTAG. Apparently,
these things have either Sharp (A-suffix) or Intel (C-suffix)

I used STMicro M25P40, which is much cheaper than EPC4. I assumed it
was rebadged as an EPC4 by Altera. There are some pins that the EPC4
datasheet calls "gnd" which really have functions if you look at the
M25P40 datasheet.

Also, by "over JTAG" do you mean with the SFL? Because a direct
programmer connection would be to a "config" header which is on the
serial bus, not the JTAG.
 
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