The W77LE58 is a fast 8051 compatible microcontroller with a redesigned processor 
core without wasted clock and memory cycles. 32 KB flash Multiple-Time Programmable(MTP) ROM.


SECURITY BITS (Lock)

D7 D6 D5 D4 D3 D2 D1 D0
1  1  1  1  B3 B2 B1 B0


B0: Lock bit
This bit is used to protect the customer's program code in the W77LE58. It may be set 
after the programmer finishes the programming and verifies sequence. 
Once this bit is set to logic 0, both the MTP ROM data and Special 
Setting Registers can not be accessed again.

B1: MOVC Inhibit
This bit is used to restrict the accessible region of the MOVC instruction.

B2: Encryption Feature

B3: This bit must be H.