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Writing to program-once registers

Question asked by adrian a on Jan 12, 2015
Latest reply on Jan 13, 2015 by Kerry Zhou

I am trying to perform a simple write to the program-once area with no luck. I am suspecting that maybe I am not performing the mass erase operation correctly. Will the ARM Flash Programmer app form USBDM do the trick?



Once the Mass Erase is complete and new firmware is loaded, I attempt to write teh program once registers. My procedure is pretty straighforward; write 0x41 to FCCOB_0, write 0x01 to FCCOB_1, 0x3 to FCCOB_4, and finally toggle the CCIF bit.


Is this enough to write 0x3 to the 2nd program-once record?