AD9389SLASHPCB datasheet(9/48 Pages) AD

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AD9389

Rev. 0 | Page 9 of 48

DESIGN GUIDE

GENERAL DESCRIPTION

The AD9389 HDMI transmitter provides a high bandwidth digital

content protected (HDCP) digital link between a wide range of

digital input formats—both audio and video (see Table 8) and

output formats (see Table 9). Video and audio data are captured

and prepared for transmission while two separate I2C buses (one of

which is a master) are used to program and provide content

protection for the data to be transmitted.

VIDEO DATA CAPTURE

The AD9389 can accept video data from as few as eight pins

(YCbCr DDR) representing 8-bit data or as many as 24 pins

representing 12-bit data. The AD9389 is capable of detecting

all of the 34 video formats defined in the EIA/CEA-861B

specification. If video ID (VID) 32, 33, or 34 is present, the user

needs to set Register 0x15[0] to 0b1, as these modes have VREF

frequencies of 30 Hz or less. The user can read the detected

video format at 0x3E[7:2]. Formats outside the EIA/CEA-861B

specification can be read in 0x3F[7:5]. Detailed line count

differences for 240p and 288p modes can be read from

0x3F[4:3]. In order to distinguish between an aspect ratio of 4:3

and one of 16:9, 0x17[1] should be set accordingly.

Table 8. Input Formats Supported

No. of Bits

Input Format

RGB (DDR)

YCbCr 4:4:4 (DDR)

RGB 4:4:4

YCbCr 4:4:4

YCbCr 4:2:2 (ITU.601)

YCbCr (DDR)

YCbCr 4:2:2 (ITU.656)

Table 9. Output Formats Supported

No. of Bits

Output Format

RGB 4:4:4

YCbCr 4:4:4

YCbCr 4:2:2

INPUT FORMATS

tSETUP

tHOLD

INPUT DATA:

D(23:0), DE, SYNCS

INPUT CLOCK-

RISING EDGE

Figure 3. Timing for Data Input

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