5.4
OTP Programming Via PSI5 Procedure
1. Enter Programming Mode.
2. Load desired data into the OTP shadow registers using PSI5 Long Write commands.
3. Send “Execute Programming of NVM“ Short command.
4. Set V CC = V PP prior to, or within t PROG_HOLD after the “Execute Programming of NVM” Command has been
transmitted. There is an internal delay of t PROG_DELAY after the “Execute Programming of NVM” Command is
received until the OTP programming begins.
5. Delay a minimum of t PROG_USER . During the OTP Write sequence, sync pulses will be ignored. However,
transmission of sync pulses during the OTP Write sequence should be prevented.
6. Read the SC register and verify IDEF_B flag is set (indicating the write is complete and successful, and the shadow
registers have been refreshed with the OTP contents).
7. Read the OTP register values and compare to the desired values.
MMA52xxKW
Sensors
Freescale Semiconductor, Inc.
53
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