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Disabling JTAG on MP5567

Question asked by Jerome GUEUNIER on Feb 5, 2016
Latest reply on Jul 22, 2016 by Jerome GUEUNIER

Hello

 

 

I'm trying to disable the JTAG on MPC5567.

I've tried to erase the shadow flash : The MCU no longer boot from internal flash ( Bootcfg = 0 0 )

Changing the shadow flash y JTAG doesn't work well ( get several part bricked trying to change the shadow flash with a Cyclone tool)

 

Question :

1) Reading the 55667RM doesn't explain why MCU doesn't start when the shadow flash has been erased ( it does on 5644A)

2) What shall really be changed to secure the MCU ? ( block the JTAG to avoid a reading of the internal flash)

 

Regards

Outcomes