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Re: [lpc2000] Code Protection

2004-02-19 by Bill Knight

Brian
  It's a bit of a kludge, but you could use an AT91FR40162/4042.
They have a piggyback flash in the same package as the CPU and
the address & data lines are brought out.  However, the package
is a BGA, and if you don't bring the signals (including some form
of JTAG enable) out from under the package, the part would have
to be removed to get access to the data.  We put a cut jumper under
the BGA to be able to create a DEBUG board w/ JTAG access.  Production
boards had it disabled.  If you need REAL code security then this is
probably not the approach you want.

Regards
-Bill Knight
R O SoftWare


On Thu, 19 Feb 2004 08:24:41 -0800, Brian C. Lane wrote:

One of the big failings of the LPC series is its lack of protection for 
the code programmed into it. MSP430 has the jtag fuse that can be blown. 
I've seen rumors that there is something in the works for later this 
year, but that's doesn't help us now.

Does anyone ave any suggestions for an ARM based, low power, large flash 
(128k minimum) with a decent pin count that has som kind of code 
protection for its flash?

Thanks,

Brian

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