TDP0604 datasheet(28/65 Pages) TI

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OUT_D2p

OUT_D2n

OUT_D1p

OUT_D1n

OUT_D0p

OUT_D0n

OUT_CLKp

OUT_CLKn

Figure 8-2. DC-Coupled TX in HDMI Source Application (AC_EN = Low). External ESD Not Shown.

CACTX

499

System 3.3V

OUT_D2p

OUT_D2n

OUT_D1p

OUT_D1n

OUT_D0p

OUT_D0n

OUT_CLKp

OUT_CLKn

Figure 8-3. AC-Coupled TX in HDMI Source Application (AC_EN = High). External ESD Not Shown.

8.3.11.2 Transmitter Impedance Control

HDMI 2.0 standards requires a source termination impedance approximately 100 Ω for data rates > 3.4 Gbps.

HDMI 1.4b requires no source termination but has a provision for termination for higher data rates greater than

1.65 Gbps. Enabling this termination is optional. The TDP0604 terminations are controlled automatically as

depicted in Table 8-9 when in pin strap mode. Depending on the MODE pin, the CFG0 pin can be used to select

the HDMI 1.4 termination between open and 300-Ω.

The TDP0604 supports automatic selection between open and 300-Ω termination when operating in HDMI1.4.

In pin-strap mode with CTL0 low, the TDP0604 will enable open termination when HDMI clock frequency is less

than fHDMI14_open and will enable 300-Ω termination when HDMI clock frequency is greater than fHDMI14_300. In

I2C mode, this feature is controlled by the TXTERM_AUTO_HDMI14 register.

In I2C mode termination is controlled through registers as described by Table 8-8.

TDP0604

SLLSFJ8 – DECEMBER 2021

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TDP0604 Datasheet(PDF) 28 Page - Texas Instruments