TDP142 datasheet(14/39 Pages) TI

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6.4 Device Functional Modes

6.4.1 Device Configuration in GPIO Mode

The TDP142-Q1 is in GPIO configuration when I2C_EN = “0”. The DPEN pin controls whether DisplayPort is

enabled and SNOOPENZ pin controls whether AUX snoop mode is enabled.

6.4.2 Device Configuration in I2C Mode

The TDP142-Q1 is in I2C mode when I2C_EN is not equal to “0”. The same configurations defined in GPIO

mode are also available in I2C mode. The TDP142-Q1 DisplayPort configuration is programmed based on the

Programming section.

6.4.3 Linear EQ Configuration

The receiver equalization gain value can be controlled either through I2C registers or through GPIOs. Table

6-2 details the gain value for each available combination when TDP142-Q1 is in GPIO mode. The I2C mode

can do the same option or even individual lane EQ setting by updating registers DP0EQ_SEL, DP1EQ_SEL,

DP2EQ_SEL, and DP3EQ_SEL.

Table 6-2. TDP142-Q1 Receiver Equalization Control

DP2EQ_SEL, OR DP3EQ_SEL

EQUALIZATION SETTING #

DPEQ1 PIN LEVEL

DPEQ0 PIN LEVEL

EQ GAIN AT 2.7/4.05/5GHz MINUS GAIN

AT 100MHz

(dB)

0.4/0.8/0.83

2.0/3.1/3.4

3.0/4.6/5.0

4.2/6.0/6.5

5.0/7.0/7.5

6.0/8.0/8.4

6.5/8.7/9.1

7.2/9.4/9.8

7.8/10.0/10.3

8.3/10.4/10.7

8.7/10.7/10.9

9.1/11.1/11.2

9.4/11.3/11.3

9.7/11.5/11.5

10.0/11.7/11.6

10.2/11.8/11.7

TDP142-Q1

SLLSG10 – NOVEMBER 2024

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