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From: patki.onkar on 1 Feb 2008 08:08
Hi all,

I am referring to the schematic of "ADSP-21262 EZ-KIT Lite Evaluation
Kit".
In the memory part of schematic of this board, chip select to the memory
(1M*8 Flash)is driven through the decoder(3 MSB of address lines in 8 bit
data mode are input to the decoder).
This means, for boot loading DSP Processor will generate addresses along
with ALE and RD. This address will be in address range so that memory gets
chip select through decoder.

Now when powered up there is no program in DSP processor, then how this
addresses and ALE are degenerated?

In the evaluation board, Y0 op of decoder goes to chip select of parallel
flash memory. This means the particular address range of DSP address is
for booting.

But in the datasheet of ADSP-21262 I could not find boot address range ?

Can you please clarify on the issue?


From: Al Clark on 1 Feb 2008 09:37
"patki.onkar" <patki.onkar(a)mte-india.com> wrote in
news:geSdnbdwtp9WhD7anZ2dnUVZ_j2dnZ2d(a)giganews.com:

> Hi all,
>
> I am referring to the schematic of "ADSP-21262 EZ-KIT Lite Evaluation
> Kit".
> In the memory part of schematic of this board, chip select to the
> memory (1M*8 Flash)is driven through the decoder(3 MSB of address
> lines in 8 bit data mode are input to the decoder).
> This means, for boot loading DSP Processor will generate addresses
> along with ALE and RD. This address will be in address range so that
> memory gets chip select through decoder.
>
> Now when powered up there is no program in DSP processor, then how
> this addresses and ALE are degenerated?

There is an internal bootloader in the 21262 internal ROM. It is executed
when the BMODE pins are set for parallel flash





>
> In the evaluation board, Y0 op of decoder goes to chip select of
> parallel flash memory. This means the particular address range of DSP
> address is for booting.

The boot program starts at the lowest address. You can see this by noting
that the decoder CS uses A23-A21 = 000





>
> But in the datasheet of ADSP-21262 I could not find boot address range
> ?
>
> Can you please clarify on the issue?
>
>
>

You can also use serial flash. We use this on our boards. It saves a lot
of board space. Thee is really no great benefit to the parallel flash
solution.

BTW, We are releasing a SHARC/Blackfin flsah programmer very soon. Here
is a link:

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


Al Clark
Danville Signal Processing, Inc.


From: Jerry Avins on 1 Feb 2008 12:40
Al Clark wrote:

...

> BTW, We are releasing a SHARC/Blackfin flsah programmer very soon. Here
> is a link:
>
> http://www.danvillesignal.com/analog-devices-development-tools/sharc-
> blackfin-programmer.html

Al,

Your email software wraps long lines. Mine wraps only at spaces. Here's
the link entire:
http://www.danvillesignal.com/analog-devices-development-tools/sharc-blackfin-programmer.html

Jerry
--
Engineering is the art of making what you want from things you can get.
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