There are two methods to write into the internal EEPROM:

1. Register Commit
2. EEPROM Direct Access

Use the following steps to bring the device into a known state and be able to conduct the programming:

1. Power down all device supplies
2. Apply RESETN=LOW.
3. Apply REFSEL=MID (leave tri-stated).
4. Apply EEPROMSEL=MID (leave tri-stated).
5. Apply 1.8 V/2.5 V/3.3 V to all device supplies. When device operation is not required, only apply 1.8 V/2.5V/3.3 V to VDDREF.
6. Apply RESETN=HIGH.
7. Use the I²C interface to configure the device using target address 0x74. See Table 8-12 for more details.

In the Register Commit flow all bits from the device registers are copied into the EEPROM. The recommended flow is:

1. Pre-configure the device as desired, except the serial interface using mode.
2. Write 1 to recal to calibrate the VCO in this operation mode.
3. Select the EEPROM page, to copy the register settings into, using regcommit_page.
4. Unlock the EEPROM for write access with ee_lock = 0x5
5. Start the commit operation by writing a 1 to regcommit
6. Force a CRC update by writing a 1 to update_crc.
7. Read back the calculated CRC in nvmlcrc.
8. Store the read CRC value in the EEPROM by writing 0x3F to nvm_wr_addr and then the CRC value to nvm_wr_data.

In the EEPROM Direct Access flow the EEPROM words are directly accessed using the address and the data bit-fields. The recommended flow is:

1. Prepare an EEPROM image consisting of 64 words.
2. Unlock the EEPROM for write access with ee_lock = 0x5
3. Write the initial address offset to the address bit-field. Write a 0x00 to nvm_wr_addr.
4. Loop through the EEPROM image from address 0 to 63 by writing each word from the image to nvm_wr_data. The EEPROM word address is automatically incremented by every write access to nvm_wr_data.
5. The EEPROM read is similar to EEPROM write. First write 0x00 to nvm_rd_addr, then loop through all bytes by reading from nvm_rd_data. The EEPROM word address is automatically incremented by every write access to nvm_rd_data.

Figure 8-12 EEPROM Direct Access Using I²C