TDP0604 datasheet(32/65 Pages) TI

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Figure 8-7 shows an example source application of snooping from the LV DDC pins. In this example, the DDC

buffer must be disabled and the HV DDC pins must be floating. This connection is supported in pin-strap mode

when MODE pin is "R". In I2C mode, the DDCBUF_EN register must be cleared to disable the DDC Buffer.

DP++

Or HDMI

Source

Redriver

LV_DDC_SDA

LV_DDC_SCL

VIO (1.14V to 3.6V)

HV_DDC_SDA

HV_DDC_SCL

Discrete

DDC

Level shi er

1.8-k

HDMI_5V

Figure 8-7. Source Application: DDC Buffer Disabled and Snoop from LV DDC pins

Figure 8-8 shows the connection of the LV and HV DDC pins when using the DDC buffer in a sink application.

This connection is supported in pin-strap mode when MODE pin is "0" or "1". In I2C mode, the DDCBUF_EN

HDMI SINK

(scaler)

47-k

Redriver

LV_DDC_SDA

LV_DDC_SCL

VIO (1.14V to 3.6V)

HDMI_5V

HV_DDC_SDA

HV_DDC_SCL

Figure 8-8. Sink Application: DDC Buffer Enabled

Figure 8-9 shows an example sink application of snooping from the LV DDC pins. In this example, the DDC

buffer must be disabled and the HV DDC pins must be floating. This connection is supported in pin-strap mode

when MODE pin is "R". In I2C mode, the DDCBUF_EN register must be cleared to disable the DDC Buffer.

Redriver

LV_DDC_SDA

LV_DDC_SCL

VIO (1.14V to 3.6V)

HV_DDC_SDA

HV_DDC_SCL

HDMI_5V

47-k

HDMI SINK

(scaler)

Discrete

DDC

Level shi er

Figure 8-9. Sink Application: DDC Buffer Disabled and Snoop from LV DDC pins

TDP0604

SLLSFJ8 – DECEMBER 2021

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