29.7.9 Programming the Fuse High Bits

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

  1. Step A: Load Command “0100 0000”.
  2. Step C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit.
  3. Set BS1 to “1” and BS2 to “0”. This selects high data byte.
  4. Give WR a negative pulse and wait for RDY/BSY to go high.
  5. Set BS1 to “0”. This selects low data byte.