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SC573 security problem

Question asked by MAndrey on Jul 13, 2018

SC573 security problem

I set public and private key in OTP memory using API functions. Then lock the device with function 'adi_rom_lock'. All functions returned 'true'. Then I reset the device. But device is OPEN. I can load unsecure programs to it and read OTP. I try to read lockbit in OTP memory location 0x48C: it is '1'. 

I repeat this procedure at another chip with the same result. The chip revision is 0.0.

The same procedure on Blackfin BF707 (it has the same security system) lock the part without any problem.

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