ADV7842
Rev. B | Page 3 of 28
GENERAL DESCRIPTION
The ADV7842 is a high quality, single-chip, 2:1 multiplexed
HDMI receiver and graphics digitizer with an integrated
multiformat video decoder.
The ADV7842 incorporates a dual input HDMI 1.4-compatible
receiver that supports all HDTV formats up to 1080p and
display resolutions up to UXGA (1600 × 1200 at 60 Hz).
The ADV7842 incorporates Xpressview fast switching on both
input HDMI ports. Using the Analog Devices, Inc., hardware-
based HDCP engine that minimizes software overhead,
Xpressview technology allows fast switching between any
HDMI input ports in less than 1 second.
The ADV7842 supports all mandatory HDMI 1.4 3D TV formats
in addition to all HDTV formats up to 1080p, 36-bit Deep Color.
The ADV7842 also integrates an HDMI v1.4 CEC controller
that supports the capability discovery and control (CDC)
feature.
The ADV7842 offers a flexible audio output port for the audio
data decoded from the HDMI stream. HDMI audio formats,
including super audio CD (SACD) via DSD and HBR are
supported.
Each HDMI port has dedicated 5 V detect and hot plug assert
pins. The HDMI receiver also includes an integrated equalizer
that ensures robust operation of the interface with cable lengths
up to 30 meters. The HDMI receiver has advanced audio
functionality, such as a mute controller, that prevents audible
extraneous noise in the audio output.
The multiformat 3D comb filter decoder supports the conversion
of PAL, NTSC, and SECAM standards in the form of a composite
or an S-Video input signal into a digital ITU-R BT.656 format.
SCART and overlay functionality are enabled by the ability of the
ADV7842 to process CVBS and standard definition RGB signals
simultaneously.
The ADV7842 contains one main component processor (CP)
that processes YPbPr and RGB component formats, including
RGB graphics. The CP also processes the video signals from the
HDMI receiver. The ADV7842 can operate in dual HDMI and
analog input mode, thus allowing for fast switching between the
ADCs and HDMI.
The ADV7842 supports the decoding of a component RGB/
YPbPr video signal into a digital YCbCr or RGB pixel output
stream. The support for component video includes 525i, 625i,
525p, 625p, 720p, 1080i, 1080p, and 1250i standards, as well as
many other SMPTE and HD standards.
The ADV7842 supports graphics digitization. The ADV7842 is
capable of digitizing RGB graphics signals from VGA to UXGA
rates and converting them into a digital RGB or YCbCr pixel
output stream. Internal EDID is available for one graphic port.
Fabricated in an advanced CMOS process, the ADV7842 is
provided in a 17 mm × 17 mm, 256-ball, BGA, surface-mount,
RoHS-compliant package and is specified over the 10°C to
+70°C temperature range.