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Re: LPC Boot Loader Internals

2006-01-04 by rtstofer

It is still an apples and oranges discussion.  My LPC2106 has version 
1.52 of the boot loader.  The 2106 doesn't implement CRP nor is there 
any claim that it does or ever will.

The LPC2292/LPC2294 Product Datasheet in section 6.2 indicates that 
CRP wasn't implemented in the boot code until version 1.60 and the 
November 14, 2005 Errata for the 2294 mentions version 1.63 as being 
current in 2004.  Presumably, Philips is at or beyond 1.63.  Anyone 
with a device that implements CRP can find the boot loader version 
with the ISP Utility.


So, any tests or results on the 2106 are meaningless.  CRP was never 
implemented on this device and the boot code may never have been 
upgraded beyond 1.52 because the hardware doesn't support CRP.  This 
is a guess.  I bought my 2106 within the last 6 months but that 
doesn't mean the chip is recent manufacture.


One could draw a couple of likely incorrect conclusions.  The code 
protection is ALL firmware and the boot code totally implements it.  
Or, some hardware was added to the design of some devices (but not the 
2106) and the boot code takes advantage of the addition.

What shouldn't be done is mention any results of testing the 2106 and 
CRP in the same document.  Or mention any version of the boot code 
prior to version 1.60 because CRP wasn't implemented.

Richard

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