Some questions on MPC5646C CSE.
1) Because Debug Authorization command need input using KDF (MASTER_EUC_KEY, DEBUG_KEY_C)
If MASTER_ECU_KEY is unknown, we have no way to erase the MCU's user keys?
2) Debug Authorization command will erase all user keys.
Does here user key include BOOT_MAC_KEY?
3) How can we identify a key slot is empty?
For a fresh part we need load key for the very first time.
Should we just use LOAD_KEY command directly and the error code will be returned if it's not empty?