SET KEY USER instruction
This instruction allows to change the HostCommUserKey if the device uses the ATAES Secure Element to store its authentication keys.
Never (permanently disabled after manufacturing). Use the CHANGE KEY instruction instead.
This instruction is permanently disabled when the device exits the factory (by setting bit 2 “Lock Secure Elements” in the Fuses). Once this is done, calling this instruction returns an error.
|Data||New key value (AES-128 - 16 bytes)|