tw9984

DATA SHORT
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4-Channel Video Decoder and Video Encoder for
Automotive Applications
TW9984
The TW9984 includes four high quality NTSC/PAL/SECAM
video decoders that convert analog composite video signal to
digital component YCbCr data. Each channel contains a 10-bit
ADC with application selectable differential or single-ended
analog video input options, proprietary clamp and gain
controllers and utilizes 4H comb filter for separating
luminance and chrominance to reduce cross noise artifacts.
The TW9984 adopts the image enhancement techniques,
such as IF compensation filter, CTI and programmable
peaking. TW9984 also includes an NTSC/PAL video encoder
with a 10-bit DAC to support CVBS output.
• IF compensation filter for improvement of color
demodulation
• Color Transient Improvement (CTI)
• Automatic white peak control
• Programmable hue, saturation, contrast, brightness and
sharpness
• Proprietary fast video locking system for non-real-time
application
• Supports the standard ITU-R BT.656 format or time
multiplexed output with 54/108MHz
• Supports a two-wire serial host interface
Related Literature
• Integrated video encoder and 10-bit video CMOS DAC
• UG018, “TW9984AT-NA1-GE-EVAL Evaluation Board User
Guide”
• Integrated clock PLL for 108MHz clock output
Features
• Ultra low power consumption (typical 550mW)
• Accepts all NTSC (M/4.43)/PAL (B/D/G/H/I/K/L/M/N/60)/
SECAM standards with auto detection
• 1.2V/3.3V power supply
• Short-to-battery, short-to-ground detection
• Single 27MHz crystal for all standards and output options
• Optional 1.8V operation of digital output
• High performance adaptive 4H comb filters for all NTSC/PAL
standards
• AEC-Q100 qualified
VIN3A
VIN3B
MUX
DIAG2
VIN4A
VIN4B
DIAG4
VOUT
MUX
DIAG3
ADC
ADC
4H COMB
VIDEO DE CO DE R
ADC
DECIMATION FILTE R
ADC
ADC
4H COMB
VIDEO DE CO DE R
ADC
DECIMATION FILTE R
ADC
ADC
4H COMB
VIDEO DE CO DE R
ADC
DAC
BT.656
INTERFACE
MPP
INTERFACE
VIN2B
ADC
MUX
VIN2A
4H COMB
VIDEO DE CO DE R
CLO CK PLL
CLO CK
GENERATOR
DIAG1
ADC
ADC
HOST
INTERFACE
VIN1B
• 10mmx10mm 68 Ld WQFN package
VD[7:0]
MPP
CLKO
XTO
XTI
SCLK
SDAT
IRQ
SHORT
DETECTION
VIN1A
MUX
• Integrated four video analog antialiasing filters and 10-bit
CMOS ADCs with differential and single-ended inputs
DIG ITAL VIDE O
ENCODER
ENCLK
ED[7:0]
FIGURE 1. TW9984 FUNCTIONAL BLOCK DIAGRAM
April 7, 2016
FN8710.3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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TW9984
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FN8710.3
April 7, 2016