9 Programming the OTP

In order to program the OTP, complete the following steps:

1. Pull EN low to disable switching.
2. Write and verify that all registers contain the desired values.
3. Read register 0x92 [7:4] to determine the number of remaining user banks available for writing:

   Register 0x92 [7:4] Value	Remaining Writes
   0001	9
   0010	8
   0011	7
   0100	6
   0101	5
   0110	4
   0111	3
   1000	2
   1001	1
   1010	0

4. If there is an available bank, apply 7.5V (±250 mV) to the VIN pin.  If not, stop.  The part cannot have the OTP burned with new values.
5. Write 0 then 1 to register 0x89 [1].
6. Read register 0x93 and check bit [2].  If it is set, the write was successful.  If not, the write failed.
7. If the write was successful, power cycle VIN.
8. Read all registers and compare with expected values.
9. If steps 5 or 7 fail, repeat steps 1 through 4.
10. If there is another failure of steps 5 or 7, discard the part.