AD9889 Analog Devices, AD9889 Datasheet - Page 9

• Manufacturer Part Number: AD9889
• Description: High Performance HDMI/DVI Transmitter
• Manufacturer: Analog Devices

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DataSheet
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DESIGN GUIDE
GENERAL DESCRIPTION
The AD9889 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 three separate I
of which are masters) are used to program and provide content
protection for the data to be transmitted.
VIDEO DATA CAPTURE
The AD9889 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 AD9889 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 R0x15[0] to 0b1, as these modes have V
frequencies of 30 Hz or less. The user can read the detected
video format at R0x3E[7:2]. Formats outside the EIA/CEA-861B
specification can be read in R0x3F[7:5]. Detailed line count
differences for 240p and 288p modes can be read from
R0x3F[4:3]. In order to distinguish between an aspect ratio of
4:3 and one of 16:9, R0x17[1] should be set accordingly.
INPUT FORMATS
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D(23:0), DE, SYNCS
INPUT CLOCK-
RISING EDGE
INPUT DATA:
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2
C buses (two
Figure 3. Timing for Data Input
REF
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t
SETUP
t
HOLD
t
Table 8. Input Formats Supported
No. of Bits
12
12
24
24
16
20
24
8
10
12
8
10
12
Table 9. Output Formats Supported
No. of Bits
24
24
16
20
24
HOLD
t
SETUP
Input Format
RGB (DDR)
YCbCr 4:4:4 (DDR)
RGB 4:4:4
YCbCr 4:4:4
YCbCr 4:2:2 (ITU.601)
YCbCr 4:2:2 (ITU.601)
YCbCr 4:2:2 (ITU.601)
YCbCr (DDR)
YCbCr (DDR)
YCbCr (DDR)
YCbCr 4:2:2 (ITU.656)
YCbCr 4:2:2 (ITU.656)
YCbCr 4:2:2 (ITU.656)
Output Format
RGB 4:4:4
YCbCr 4:4:4
YCbCr 4:2:2
YCbCr 4:2:2
YCbCr 4:2:2
t
HOLD
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