This section provides a summary of recommended and optional steps.
| Step | Description | Requirement |
|---|---|---|
| 1 | Crystal/crystal oscillator frequency trimming | Recommended |
| 2 | MAC address programming | Recommended |
| 3 | QSPI encryption key programming | Optional |
| 4 | Assembly test | Optional |
Before programming any values in the One Time Programmable (OTP) memory, set the register REGION.PROTECT to allow full read/write access. See OTP memory programming for more information.