38.3.3 Configuration Change Protection

This peripheral has registers under Configuration Change Protection (CCP), a security mechanism to avoid unintentional changes to the CRCSCAN settings. To write to these, first write a specific key to the CPU.CCP register, followed by a write access to the protected bits within four CPU instructions.

Attempting to write to an SFR protected register without following the appropriate CCP unlock sequence leaves the protected register unchanged and returns a Bus Error response on the data bus.

The following register is under CCP: