[Cryptech Tech] EIM Problems

[Joachim Strömbergson]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Aloha!

Leif Johansson wrote:
> Re-reading this thread (as a naive on-looker) I can't figure out
> what you guys are saying - if this is a design choice in the novena
> then its just a matter of "gilla läget" [1] or am I missing
> something?

As far as I see it (see other, a bit longer mail.) As Randy suggested
(and I agree with) in an earlier mail we, should give Bunnie credit for
getting working FPGA designs that communicates with the CPU via the EIM.

The Freescale documentation states a different clock frequency max than
what Bunnie is using (104 vs 133). But after testing I believe more in
what Bunnie does than what Freescale writes. One thing to note is that
Freescale (as far as I am able to search) does not actually provide the
documentation for the exact version of the CPU used on the real Novena,
but only for parts with 1 GHz clock. If that has anything to do with the
EIM clock I don't know (I can't find the specific clock source for the
EIM_BCLK in the documentation.)

So yes, we need to "gilla läget" and design for what is really there.
And I lean towards Bunnies definition of what is there.

Does this makes it more understandable?

And also let me state that I really appreciate that Paul Shatov clearly
read the documentation firmly and found this discrepancy. We need more
good eyes and minds.

- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
========================================================================
 Joachim Strömbergson          Secworks AB          joachim at secworks.se
========================================================================
-----BEGIN PGP SIGNATURE-----
Version: GnuPG/MacGPG2 v2
Comment: GPGTools - http://gpgtools.org
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
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=PQ2Z
-----END PGP SIGNATURE-----