AD9889 查看數據表（PDF） - Analog Devices
零件编号
产品描述 (功能)
生产厂家
AD9889 Datasheet PDF : 48 Pages
| |||
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 I2C buses (two
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 VREF
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
INPUT CLOCK-
RISING EDGE
tSETUP
Table 8. Input Formats Supported
No. of Bits
Input Format
12
RGB (DDR)
12
YCbCr 4:4:4 (DDR)
24
RGB 4:4:4
24
YCbCr 4:4:4
16
YCbCr 4:2:2 (ITU.601)
20
YCbCr 4:2:2 (ITU.601)
24
YCbCr 4:2:2 (ITU.601)
8
YCbCr (DDR)
10
YCbCr (DDR)
12
YCbCr (DDR)
8
YCbCr 4:2:2 (ITU.656)
10
YCbCr 4:2:2 (ITU.656)
12
YCbCr 4:2:2 (ITU.656)
Table 9. Output Formats Supported
No. of Bits
Output Format
24
RGB 4:4:4
24
YCbCr 4:4:4
16
YCbCr 4:2:2
20
YCbCr 4:2:2
24
YCbCr 4:2:2
tHOLD
INPUT DATA:
D(23:0), DE, SYNCS
tHOLD
tSETUP
tHOLD
AD9889
Figure 3. Timing for Data Input
Rev. 0 | Page 9 of 48
Share Link: 