DATA SHORT
To request the full datasheet, please visit www.intersil.com/products/tw8835
TW8835
LCD Video Processor with Built-In Decoder, MCU, OSD, TCON and Analog RGB
Input Support
FN7864
Rev 4.00
January 4, 2016
The TW8835 incorporates many of the features required to
create multipurpose in-car LCD display system in a single
package. It integrates a high quality 2D comb
NTSC/PAL/SECAM video decoder, triple high speed RGB ADCs,
high quality scaler, versatile OSD and high performance MCU.
Its image video processing capability includes arbitrary
scaling, panoramic scaling, image mirroring, image
adjustment and enhancement, black and white stretch, etc. On
the input side, it supports a rich combination of CVBS, S-video,
component video, analog RGB as well as digital YCbCr/RGB
inputs. On the output side, it supports a variety of digital panel
types with its built-in timing controller. The integration of
additional touch screen controller, LED driver controller, PWM
and MCU makes this a versatile solution for many portable
applications.
Features
Applications
• PAL delay line for color phase error correction
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
• Three 10-bit ADCs 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
• Software selectable analog inputs allow composite, S-video,
analog YPbPr or RGB
• High quality adaptive 2D comb filter for both NTSC and PAL
inputs
• Image enhancement with 2D dynamic peaking and CTI
• In-car display
• Digital subcarrier PLL for accurate color decoding
• Portable DVD and DVR players
• Digital horizontal PLL and advanced synchronization
processing for VCR playback and weak signal performance
• Portable media players
• Programmable hue, brightness, saturation, contrast,
sharpness
• High quality horizontal and vertical filtered down scaling
with arbitrary scale down ratio
SPI
FLAT PANEL OUT
SPI
OSD
YIN0~2
CIN0~1
MCU
2D-COMB
VIDEO
DECODER
TCON SIGNALS
TCON
SERIAL DATA
FONT OSD
VIN0~1
BT.656 OUTPUT
LED/
VCOM
CONTROL
INPUT
CONTROLLER
TRIPLE
ADCs
DTVCLK
SCALER/
IMAGE
ENHANCE
OUTPUT
FORMATTER
2-WIRE
SERIAL
BUS
DTVHS, VS
DTVDE
DTV
I/F
I2C_SDAT
I2C_SCLK
DTVD[23:0]
FIGURE 1. FUNCTIONAL BLOCK DIAGRAM
FN7864 Rev 4.00
January 4, 2016
Page 1 of 3
TW8835
Features (Continued)
Analog RGB Inputs
Clock Generation
• Triple high speed 10-bit ADCs with clamping and
programmable gain amplifier
• Spread spectrum profile based on triangular modulation with
center spread
• SOG and H/VSYNC support for YPbPr or RGB input
• Programmable modulation frequency and spread width
• Built-in line locked PLL with sync separator
Timing Controller (TCON)
• Supports input resolution up to 1080p
• Supports programmable interface signals for control
Digital Inputs Support
• Column (source) driver/row (gate) driver
• Supports both BT.656 and 601 video formats
MCU
• Supports YCbCr/RGB 24-bit input
• Industry standard 8052 based
• Supports RGB.565 + BT.656 at the same time
• Code fetch from external SPI flash memory
• Supports input resolution up to 1080p
• 256B code cache
TFT Panel Support
• 2k XDATA memory
• Built-in programmable timing controller
• Support power save mode with 32k internal clock
• Supports 3, 4, 6 or 8 bits per pixel up to 16.8 million colors
with built-in dithering engine
• ISP (in system programming) with internal boot ROM
• Supports digital panel up to XGA resolution
• Supports serial (8-bit) RGB panel
Font Based On-Screen Display
• Four window font OSD with bordering/shadow
• 10kB programmable font RAM and 512 display RAM
• 1/2/3/4 bits/pixel
• Supports variable width (12/16), height (2~32)
SPI Flash Based On-Screen Display
• Nine bitmap based OSD windows through SPI
• Supports 4/6/8 bits/pixel
• Supports RLE decompression for one window
• Supports overlapping between windows
Image Processing
• High quality scaler with both up/down and panorama scaling
support
• Built-in 2D deinterlacing function
• Programmable brightness, contrast, saturation, hue and
sharpness
Decoder Output
• Independent BT.656 decoder output
Touch Screen Controller
• Built-in 4-wire resistive touch screen
• 12-bit ADC
• 4-channel auxiliary input
Miscellaneous
• Supports 2-wire serial bus interface
• Built-in single LED backlight controller
• Built-in VCOM DC voltage
• Built-in VCOM AC
• Built-in DC/DC converter
• Up to 4 PWMs
• GPIOs
• 1.8/3.3V operation
• Power-down mode
• Single 27MHz crystal
• 128 pin LQFP and 144 pin TFBGA package
• Programmable color transient improvement control
• Supports programmable cropping of input video and graphics
• Independent RGB gain and offset controls
• DTV hue adjustment
• Programmable 8-bit gamma correction for each color
• Black/white stretch
FN7864 Rev 4.00
January 4, 2016
Page 2 of 3
TW8835
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FN7864 Rev 4.00
January 4, 2016
Page 3 of 3