www.ti.com
November 2013
LMK01000 Evaluation Board
SNAU037A
7
Copyright © 2013, Texas Instruments Incorporated
7)
Program
the part by clicking “Keyboard Controls”
“Load Device” or by pressing
Ctrl+L
.
***
Be advised:
GOE and SYNC* on the IC have internal pull-ups. Voltage dividers are used to
lower 5 V LPT ports to safe levels for the device while still programming with 3.3 V LPT ports.
When the cable is removed however, the pull-down of the voltage divider will overpower the
pullup of the GOE or SYNC*. For this reason GOE is disconnected so the cable can be
disconnected and the outputs still will be on. However, or any channels which have dividers
enabled, the SYNC* will go low and cause them to stop oscillating. Future versions of the
evaluation board have zener diodes on GOE and SYNC* to eliminate this issue.