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Multiprocessing ADSP-21065L

Started by Mohamed Akresh January 29, 2004
Hello all,

I am trying to connect two ADSP-21065L EZ-Lab.
I have a problem in finding the Hardware Interface
between the two processors.
It is stated in the ADSP-21065L User's Manual for
particular enviroments that the pins must be connected
between the two processors as follows:
ADDR 23-0, DATA 31-0, MS 3-0, RD, WR, ACK, SBTS, SW,
BR 2-1, RESET, CLKIN
I did't find the CLKIN pin in the User'Manual from the
Board, so i was not able to short together these pins
on the both processors.
please try to help me in this topic and thanx

best regards

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On Thu, 29 Jan 2004, [iso-8859-1] Mohamed Akresh wrote:

> I am trying to connect two ADSP-21065L EZ-Lab.
> I have a problem in finding the Hardware Interface
> between the two processors.
> It is stated in the ADSP-21065L User's Manual for
> particular enviroments that the pins must be connected
> between the two processors as follows:
> ADDR 23-0, DATA 31-0, MS 3-0, RD, WR, ACK, SBTS, SW,
> BR 2-1, RESET, CLKIN
> I did't find the CLKIN pin in the User'Manual from the
> Board, so i was not able to short together these pins
> on the both processors.
> please try to help me in this topic and thanx

I don't have the ezkit, but the manual says ball j1 on
the mini-bga, and pin 30 on the mqfp. Data sheet is better
word than manual I guess in this case.

Patience, persistence, truth,
Dr. mike


--On Thursday, January 29, 2004 12:55 PM +0100 Mohamed Akresh
<> wrote:

> I am trying to connect two ADSP-21065L EZ-Lab.

Be careful with this: The bus speed is very high and a simple ribbon cable
won't do it, as the edge rates result in lots of cross-talk in the data
signals. There's some special ribbon cable made for this kind of thing, with
adjacent conductors "shaped" to not be parallel. As I didn't have any when I
did this, my hardware buddy used an Exacto knife and coffee stirrers to fake
some up from regular ribbon cable. Looked silly but worked pretty well.