Author Topic: LPC4370 - any way to protect firmware?  (Read 1401 times)

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Offline splinTopic starter

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LPC4370 - any way to protect firmware?
« on: January 26, 2015, 01:22:39 pm »
As this is a ROMless part the firmware is open to being copied and reverse engineered from the external SPI flash device. The user manual talks about AES encrypted boot mode but this feature is only available on 43Sxx devices - of which the only ones available seem to be the 43S20, 43S30 and 43S50.

Is this right? This seems to be such a major shortcoming of the LPC4370 that I feel I must be missing something?

I noticed that Digikey will no longer be stocking the 100 pin version when stocks are exhausted - is this a worry, a sign that the part wasn't popular and vulnerable to being obsoleted? Perhaps even to be replaced by a non-BGA version with built in Flash?

Splin
 


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