Data Path

&

Timing Ref.

8-6 Bit

Translator

RxIN[3]±

RxIN[2]±

RxIN[1]±

RxIN[0]±

RxCLK±

RSDS[2:0]

RSR[2:0]P/N

RSG[2:0]P/N

RSB[2:0]P/N

STH

RSTZ

RPI

Column & Row

Driver Control

RSCKP/N

Vertical & Horizontal

Timing Generation

OBSOLETE

FPD87346

SNOSA51A – MAY 2004 – REVISED APRIL 2013

www.ti.com

Block Diagram

Figure 2. Block Diagram

Functional Description

FPD-LINK RECEIVER

The LVDS based FPD-Link Receiver inputs video data and control timing through 4-LVDS channels plus clock to

provide 24-bit color or 3-LVDS channels can be used for 18-bit color. The video data is converted to a parallel

data stream and routed to the 8-6 bit translator.

SPREAD SPECTRUM SUPPORT

The FPD-Link receiver supports graphics controllers with Spread Spectrum interfaces for reducing EMI. The

Spread Spectrum methods supported are Center and Down Spread. A maximum of 2% total is supported at a

frequency modulation of 100kHz maximum.

8-6 BIT TRANSLATOR

8-bit data is reduced to a 6-bit data path via a time multiplexed dithering technique or simple truncation of the

LSBs. This function is enabled via the input control pins.

DATAPATH BLOCK AND RSDS TRANSMITTER

6(8)-bit video data (RGB) is input to the Datapath Block supports up to an 85 MHz pixel rate. The data is delayed

to align the Column Driver Start Pulse (STH) with the Column Driver data. The data bus (RSR[2:0]P/N,

RSG[2:0]P/N, RSB[2:0]P/N) outputs at a 170 MHz rate on 9 differential output channels. The clock is output on

the RSCKP/N differential pair. The RSDS Column Drivers latch data on both positive and negative edges of the

clock. The RSDS output setup/hold timings are also adjustable through the RSDS[2:0] input pins.

TIMING CONTROL FUNCTION

The Timing Control function generates control to Column Drivers, Row Drivers, and power supply. The GPOs

(General Purpose Outputs) provide for CD latch pulse, REV, and Row Driver control generation. The General

Purpose Outputs allow the user to generate control anywhere within the frame data. Standard Row Driver

interface or Custom Row Driver interfaces can be implemented with the GPOs (General Purpose Outputs).

RSDS OUTPUT VOLTAGE CONTROL

RSDS output signal levels can be adjusted to suit the particular application. This is dependent on overall LCD

module design characteristics such as trace impedance, termination, etc. The RSDS output voltage is inversely

power consumption will also increase.

2

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