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Reprogamming MC9S08PA16 after issuing backdoor unlock sequence

Question asked by Jonas Ketterle on May 26, 2014
Latest reply on Sep 22, 2014 by Pablo Slavkin

Hi All,

 

My desired outcome is to reprogram a secure MC9S08PA16 without overwriting the data stored in EEPROM. To do so, I am first sending a backdoor key to temporarily unsecure the device, and I've verified that the MC9S08PA16 is successfully unlocked (NVM_FSEC = 190) after receiving the backdoor key. However, when I connect the USB Multilink and click program, I still get a "Device is Secure" Message. Any recommendations?

 

Jonas

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