GPU1

MAIN[1:0]

MLA[1:0]

OUT[1:0]

AUX+

2:1 FET

1 or 2 diff

AUX_A+

GPU2

MAIN[1:0]

MLB[1:0]

AUX+

AUXSNKn

AUXSNKp

AUX-

HPD

HPD

LCDpanel

connector

1 or 2 diff

IN[1:0]

OUT[1:0]

DP119

AUX_A-

AUX_B+

AUX_B-

AUX-

2:1 FET

1 or 2 diff

SN75DP119

SLLSE12A – NOVEMBER 2009 – REVISED JULY 2014

www.ti.com

Functional Block Diagram (continued)

Figure 7. Typical Implementation Showing Two GPU Sources, a 2:1 FET Switch, and the DP119 as Signal

Conditioner

9.3 Feature Description

9.3.1 Pre-Emphasis and VOD Output Swing Setings

The SN75DP119 allows configuring output pre-emphasis and output swing through the external control inputs.

The following options are valid:

Table 1. Pre-Emphasis and VOD Output Swing Configuration

PRE_CTL = VCC/2

PRE_CTL = LOW

PRE_CTL = HIGH

(INPUT LEFT FLOATING)

VOD_CTL = LOW

2.5 dB pre-emphasis

6 dB pre-emphasis

8.5 dB pre-emphasis

(lowest power consumption)

VOD_CTL = VCC/2

(input left floating)

no pre-emphasis

3.5 dB pre-emphasis

5.5 dB pre-emphasis

VOD_CTL = HIGH

no pre-emphasis

2.5 dB pre-emphasis

no pre-emphasis

12

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