EPROM

Got to make a decision on what type of EPROM to use on the board.
I was going to follow the EZLITE kit and use the AM29LV081B but that means
it must be either programmed before being soldered to the board, or I need a
JTAG programmer.
The latter is a possibility, but what of the conventional alternative of a
socket and a big DIL package? Would there be any problems with the extra
track lengths, inductance, capacitance etc?

Dirk Start a New Thread

Dirk Bruere wrote:
> Got to make a decision on what type of EPROM to use on the board.
> I was going to follow the EZLITE kit and use the AM29LV081B but that
> means it must be either programmed before being soldered to the board,
> or I need a JTAG programmer.
> The latter is a possibility, but what of the conventional alternative
> of a socket and a big DIL package? Would there be any problems with
> the extra track lengths, inductance, capacitance etc?
>
> Dirk

I suggest you use a serial flash instead of a parallel flash. We use
the Atmel AT26F004 (4Mbit). The AT26DF81 is another good choice (8Mbit).
If you are just using for booting, a 4Mbit device is fine since it is
larger than needed. The SST devices are another reasonable choice.

There are several reasons to avoid the parallel flash. Most parallel
flash devices are moving to the new CFI writing convention. This will
not work with the 2126x or 21364 because 32 bit packing gets in the way.
You also can avoid a lot of unnecessary board space and routing.

You can program all of these devices with a dspFlash Blackfin and Sharc
Programmer.

http://www.danvillesignal.com/analog-devices-development-tools/sharc-blackfin-programmer.html

Al Clark
Danville Signal.
>
> Start a New Thread