Datasheet

November 2013 LMK040xx Evaluation Board User’s Guide SNAU045A 33
Copyright © 2013, Texas Instruments Incorporated
www.ti.com
Appendix E: Changing Active On-board Oscillator for PLL1
Changing from Crystal Resonator to VCXO
If the board has been setup to use the crystal-based oscillator with PLL1, the crystal may be
disabled and the VCXO enabled as described on the following pages:
1. Install a zero Ohm resistor in R79 (near the VCXO)