Programming the Lock Bits

The algorithm for programming the Lock bits is as follows (Please refer to Programming the Flash for details on Command and Data loading):

  1. 1.Step A: Load Command “0010 0000”.
  2. 2.Step C: Load Data Low Byte. Bit n = “0” programs the Lock bit.
  3. 3.Give WR a negative pulse and wait for RDY/BSY to go high.

The Lock bits can only be cleared by executing Chip Erase.