LMK05028RGCT.B datasheet(56/94 Pages) TI2

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TI suggests using EEPROM mode when any of the following is required:

• A single custom start-up frequency configuration is needed from a single OPN.

• A host device is available to program the registers and EEPROM (if desired) with a new configuration after

power-up through I2C or SPI.

• SPI protocol is required for register access because SPI is not supported in ROM mode.

7.4.1.2 ROM Mode

In ROM mode, the device's frequency configuration is loaded to the registers from one of 16 register pages in

ROM selected by the GPIO[3:0] control pins. All register pages in the ROM image are factory-set in hardware

(mask ROM) and not software programmable. Only the I2C interface is available after start-up in ROM mode.

A benefit of ROM over EEPROM is a custom ROM image can support up to 16 different pin-selectable frequency

configurations from a single OPN. A factory preset device with custom ROM image is assigned by TI with a

unique OPN.

7.4.2 PLL Operating Modes

Both PLL channels have identical functionality and modes of operation, but each are configured and operate

independently. The operating mode for both channels can be different at any time. The following sections

describe the PLL modes of operation shown in Figure 7-39.

LMK05028

SNAS724B – FEBRUARY 2018 – REVISED FEBRUARY 2025

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LMK05028RGCT.B Datasheet(PDF) 56 Page - Texas Instruments