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SNAU126A
LMK04906 Family: Low-Noise Clock Jitter with Dual Loop PLLs Revised – December 2013
Copyright © 2013, Texas Instruments Incorporated
Figure 18: Selecting the LPT Port Address
Correct LPT Mode
If communications are not working, then it is possible the LPT port mode is set
improperly. It is recommended to use the simple, Output-only mode of the LPT port.
This can be set in the BIOS of the computer. Common terms for this desired parallel
port mode are “Normal,” “Output,” or “AT.” It is possible to enter BIOS setup during the
initial boot up sequence of the computer.
Legacy Board Port Setup
If LPT communication with the LMK04906B EVM is required, then the following
configuration should be followed for proper operation. Ensure the LPT port is configured
correctly as well.