W78E051C40FL Просмотр технического описания (PDF) - Winbond

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производитель

W78E051C40FL

8-BIT MICROCONTROLLER

Winbond 

W78E51C/W78E051C

6.2 MOVC Inhibit

This bit is used to restrict the accessible region of the MOVC instruction. It can prevent the MOVC

instruction in external program memory from reading the internal program code. When this bit is set to

logic 0, a MOVC instruction in external program memory space will be able to access code only in the

external memory, not in the internal memory. A MOVC instruction in internal program memory space

will always be able to access the ROM data in both internal and external memory. If this bit is logic 1,

there are no restrictions on the MOVC instruction.

6.3 Encryption

This bit is used to enable/disable the encryption logic for code protection. Once encryption feature is

enabled, the data presented on port 0 will be encoded via encryption logic. Only whole chip erase will

reset this bit.

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Publication Release Date: November 10, 2006

Revision A4

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