This section describes the transmitter configuration.

AC_EN: In pin-strap mode, the AC pin selects between AC-coupled or DC-coupled transmitter.

TXPRE: The TDP0604 provides pre-emphasis and de-emphasis on the data lanes allowing the output signal preconditioning to offset interconnect losses between the TDP0604 transmitters and a TMDS receiver. Pre-emphasis and de-emphasis is not implemented on the clock lane. There are two methods to implement pre-emphasis, pin strapping or through I2C programming. TX pre-emphasis and de-emphasis control is only supported in limited mode. When using pin-strap mode, the TXPRE pin controls four different global pre-emphasis and de-emphasis values for all data lanes when TDP0604 is operating in HDMI 1.4 or HDMI 2.0.

TXSWG: The TDP0604 transmitter swing level can be adjusted in both pin-strap and I2C mode.

In I2C mode, TX swing settings are controlled independently for each lane (both clock and data) through registers. In addition, the TX swing used when operating in HDMI 1.4 and HDMI 2.0 can be independently controlled through HDMI14_VOD and HDMI20_VOD registers.

In pin-strap mode with limited re-driver option enabled, the TXSWG pin adjusts the default 1000-mV swing. In HDMI 1.4 the TXSWG pin controls the swing for both the data and clock lanes. In HDMI 2.0, the TXSWG pin controls the swing for data lanes while the clock lane will remain at default value.