DATA SHORT
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TW8809
Low Cost Video Format Converter
The
TW8809
is a low cost video format converter that can take
either analog CVBS or 24-bit digital RGB format video and
output these signals in ITU-R.656 format. The video sources
can be scaled and deinterlaced, so that the ITU-R BT.656
output is already formatted to the desired resolution and in
progressive format. In addition, the TW8809 has built-in OSD
and image enhancement capabilities.
FN8598
Rev 3.00
July 26, 2016
On Screen Display
• 256 font RAM and 512 display RAM
• Four windows font OSD with bordering/shadowing
• 1/2/3/4 bits/pixel
• Supports variable width (12/16), height (2~32)
Applications
• Rear seat entertainment
• Radio head unit
Image Processing
• High quality scaler with both up/down and nonlinear scaling
support
• Panorama/water-glass scaling
• Built-in 2D deinterlacing function
• Programmable hue, brightness, saturation, contrast and
sharpness
• Programmable cropping of input video and graphics
• Independent RGB gain and offset controls
• Programmable 8-bit Gamma correction for each color
• Operates in frame sync mode
• Black/white stretch
Features
Analog Video Decoder
• NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N combination),
PAL (60), SECAM with automatic format detection
• Selectable differential or single-ended CVBS input
• Supports two differential or 4 single-ended CVBS inputs
• 10-bit ADC and analog clamping circuit
• Fully programmable static gain or automatic gain control for
the Y or CVBS channel
• Programmable white peak control for the Y or CVBS channel
• High quality adaptive 2D comb filter for both NTSC and PAL
inputs
• PAL delay line for color phase error correction
• Image enhancement with 2D dynamic peaking and CTI
• Digital subcarrier PLL for accurate color decoding
• Digital horizontal PLL and advanced synchronization
processing for VCR playback and weak signal performance
• Programmable hue, brightness, saturation, contrast and
sharpness
Clock Generation
• Spread spectrum clock
• Selectable modulation frequency and spread width
Power Management
• Supports functional based independent power-down
• 1.8/3.3V operation
Miscellaneous
• Short-to-battery detection test
• Short-to-ground detection test
• Supports 2-wire serial bus interface
• Single 27MHz crystal
• 56 lead QFN (with wettable flanks)
• TW8809AT-NA2-GR is
AEC-Q100
qualified
Digital Input
• Supports YCbCr/RGB 24-bit input
• Supports both BT.656 and BT.601 video formats
• Supports input resolutions up to 720p
Digital Output
• ITU-R BT.656 compatible YCbCr (4:2:2) output format
• Progressive ITU-R BT.656 output format for both interlaced
and progressive inputs
• Output resolution up to SVGA (pseudo BT.656)
FN8598 Rev 3.00
July 26, 2016
Page 1 of 2
TW8809
TW8809 Functional Block Diagram
YIN0+ / YIN0
YIN0‐ / YIN1
M U X
YIN2+ / YIN2
YIN2‐ / YIN3
AAF
10bit
ADC
2D Comb
Decoder
Scaler
Image Enhancer
Timing Gen.
BT.656
CSC
Gamma
Dither
OUT
MUX
BT.656
Encoder
I N M U X
Diagnostic
IRQ
Measurement
DRGB24/16/8
DTV
Interface
Spread
Spectrum
PLL
Font OSD
MPO/IRQ
OSC
Registers
I2C
FIGURE 1. TW8809 FUNCTIONAL BLOCK DIAGRAM
© Copyright Intersil Americas LLC 2013-2016. All Rights Reserved.
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For additional products, see
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Intersil products are manufactured, assembled and tested utilizing ISO9001 or TS16949 quality systems as applicable
noted in the quality certifications found at
www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such
modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are
current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its
subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see
www.intersil.com
FN8598 Rev 3.00
July 26, 2016
Page 2 of 2
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