address of lock bit in 8051

[grittinjames]

what is the address of lock bits for 8051

 

[markosik20]

Pass name 8051 because they are not standard.

 

[IanP]

The exact location of lock bits in 8051-derivatives which have them is undisclosed ..
They are somewhere in the program memory (Flash, EPROM or OTP) and you can find in data sheet of a particular derivative how to program, read or erase (only together with program memory, if applicable) them .. see example below ..

Regards,
IanP

 

[grittinjames]

if we r able to erase this lock bit .we can read it back also?

 

[IanP]

You can't erase just the lock bits, you have to use CHIP ERASE procedure and only then the lock bits will be erased - including all bytes of the program memory ..

Regards,
IanP