CAT6611 データシートの表示（PDF） - Unspecified

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CAT6611

Single-Link HDMI Transmitter

Unspecified 

CAT6611

Functional Description

CAT6611 provides complete solutions for HDMI Source systems by implementing all the required

HDMI functions. In addition, advanced processing algorithms are employed to optimize the

performance of video processing such as color space conversion and up/down sampling. The

following picture is the functional block digram of CAT6611, which describes clearly the data flow.

PCSCL PCSDA ROMSCL ROMSDA

SYSRSTN

PCADR

PCLK

VSYNC

HSYNC

DE

D[23:0]

MCLK

SCK

WS

I2S[3:0]

SPDIF

INT

Configuration

Register

Blocks

Video Data

Capture

&

DE Generator

Audio Data

Capture

I2C Slave

(to host)

I2C

Master

(to HDCP

EEPROM)

I2C Master

(HDCP

Controller)

Color Space

Conversion

4:2:2

4:4:4

Pixel Repeat

HDCP Cipher

&

Encryption Enginer

TMDS

Transmitter

(DVI/HDMI)

DDCSCL

DDCSDA

TX2P/M

TX1P/M

TX0P/M

TXCP/M

Interrupt Controller

HPD

Figure 2. Functional block diagram of CAT6611

Video Data Processing Flow

Figure 3 depicts the video data processing flow. For the purpose of retaining maximum flexibility, most

of the block enablings and path bypassings are controlled through register programming. Please refer

to CAT6611 Programming Guide for detailed and precise descriptions.

As can be seen from Figure 3, the first step of video data processing is to prepare the video data

(Data), data enable signal (DE), video clock (Clock), horizontal sync and vertical sync signals

(H/VSYNC). While the video data and video clock are always readily available from input pins, the

preparation of the data enable and sync signals require special extraction process (Embedded Ctrl.

Signals Extraction & DE Generator) depending on the format of input video data.

All the data then undergo a series of video processing including YCbCr up/down-sampling,

color-space conversion and dithering. Depending on the selected input and output video formats,

different processing blocks are either enabled or bypassed via register control. For the sake of

flexibility, this is all done in software register programming. Therefore, extra care should be taken in

The CAT logo is a registered trademark of Chip Advanced Technology

2007 Chip Advanced Technology Inc. – All Right Reserved.

June-2007 Rev:1.0a 7/29

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