The algorithm for programming the Extended
Fuse bits is as follows (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 “0” and BS2 to “1”. This
selects extended data byte.
- 4.Give WR a
negative pulse and wait for RDY/BSY to go high.
- 5.Set BS2 to “0”. This selects low data
byte.
Figure 1. Programming the FUSES
Waveforms