I am attempting to perform a Mass Erase operation on a secured MK20DX256VLH7.
When not secured, the device Erases fine.
When secured, the "Flash Mass Erase Acknowledge" bit is never set.
In some documentation "Production Flash Programming - Best Practices for Kinetis K- and L- Series MCUs", it suggest asserting the Reset pin, it also mentions, that should there not be a Reset pin connected, it can be done by setting the 'System Reset Request' bit in the MDM-AP register. However..... in the Data Sheet, its says this bit cannot be set while in secure mode......
Am I correct in assuming that to Mass Erase a Secured MK20DX256VLH7, I must hold this pin low?
Or is there another way?