Select the target MCU chip, the program prompts the relevant adapter. Meanwhile, dispaly the options to select the lock bit:

MCS-51encryption setup, lock bit functions: No LockBit:no LockBit1:forbiden MOVC instruction and programming again.  LockBit1+2:include the above functions and forbiden test (forbiden readout FLASH) LockBit1+2+3:include the above functions and forbiden external program memory