See Bidirectional I/O Detailed Design Procedure and follow Steps 1-5. Refer to additional steps below for cable equalizer with loop-through applications.
- Configure EQ/CD_SEL and SDI_OUT_SEL pins according to the desired default use case. In a cable loop-through application, the EQ/CD_SEL pin must be set to Level L so that the LMH1297 operates in EQ mode. Also note that in EQ mode, OUT0 is always enabled, regardless of the logic applied to OUT0_SEL.
- Tune the HOST_EQ0 100-Ω driver control pin to equalize the PCB output trace following OUT0±. Use register control for more tuning options if necessary.