FEATURES GENERAL DESCRIPTIONS
 Supports multiple output display formats – including
Component YPrPb(HDTV), LVDS and analog RGB
(VGA)
 Three 10-bit high speed DACs
 HDTV output support up to 1080p
 Analog RGB (VGA) support up to 1920x1080
resolution
 Single channel LVDS 18-bit transmitter supports
input resolution up to 1366x768
 Support scaled and bypassed video streams output
from VGA/HDTV and LVDS interfaces
simultaneously
 Supports panel protection, power sequencing and
backlight on/off. PWM is available for controlling
LCD brightness
 TV/Monitor connection detect capability. DACs can
be switched off through programming internal
registers
 On-chip SDRAM frame buffer to support frame rate
conversion.
 Programmable adaptive de-flickering filter
 Supports 8/12/16/18/24-bit parallel interface inputs
for either RGB format or YCbCr format (ITU-R 656
or ITU-R 601). 80/86 MPU interface and DE only
mode are also supported.
 Wide range of input resolutions support for up to
1366x768 (i.e. 640x480 720x480, 720x576, 800x600,
1024x600, 1024x768, 1280x800, and etc.)
 Image display rotation support at 90/180/270 degree
or flipped in horizontal/vertical position
 Pixel-level color enhancement for brightness,
contrast, hue and saturation adjustment for HDTV
 Horizontal/vertical position adjusted through serial
port programming
 Pixel clock input frequency support for up to 165
MHz
 Flexible crystal or oscillator clock input frequency
(2.3MHz – 64MHz)
 IO Supply Voltages from 1.2V to 3.3V and SPC/SPD
Supply Voltages from 1.8V to 3.3V.
 Programmable power management
 Device fully programmable through serial port or can
automatically load firmware from Chrontel Boot
ROM (CH9904)
 Offered in a 88-pin QFN package
Chrontel CH7034B is specifically designed for a portable
system that requires connections to LCD display, High
Definition Television (HDTV) or RGB (VGA) monitor.
With its advanced video encoder, flexible scaling engine
and easy-to-configure video interface, the CH7034B
satisfies manufactures’ product display requirements and
reduces their costs of development and time-to-market.
The CH7034B provides analog RGB and YPrPb outputs
that allow a system to display high definition media
content to HDTV/RGB monitors. The device is
compliant with EIA770-3 and SMPTE 274M/293M
/296M standards and supports HDTV resolution up to
1080p. The 3 high-performance, 10-bit DACs can be
used for either HDTV display or VGA output. The
CH7034B has the ability to generate composite syncs if
required by the RGB monitor.
To support portable computer with LCD display, the
CH7034B has incorporated an one-channel, 18-bit output
LVDS transmitter. On-chip dithering function is
available to convert 24-bit color to 18-bit color LCD
panels. Two popular LVDS standards, the OpenLDI and
the VESA SPWG are supported by the CH7034B LVDS
driver. The preferred standard and its display timing can
be configured through devices’ registers when system is
powered on.
The CH7034B is equipped with panel protection
mechanism to switch off the LCD instantly if input data
is missing or unstable. The panel on/off sequences and
backlight control can be configured through
programming internal registers. In addition, a built-in
PWM function can be used to achieve digital dimming
for LCD panel.
The CH7034B converts a wide range of input formats to
HDTV/VGA outputs and LVDS display. RGB data
format such as 16-bit 5:6:5, 18-bit 6:6:6 or 24-bit 8:8:8
enters through the device’s 24-bit bus. In YCrCb format,
either 24-bit 4:4:4 data or 16-bit 4:2:2 is supported by the
CH7034B’s color space converter. The device’s video
capture block also has an option to support 80/86 MPU
interface. The input video signal can be either interlaced
or non-interlaced data formats.
With its embedded high speed SDRAM, the CH7034B
can help manufactures design their products to achieve
simultaneous LVDS and HDTV/VGA display. Thanks to
the sophisticated scaler, the input LCD data with low
resolution or reduced-frame rate can be covert to high
APPLICATION
 Mobile Internet Devices
 Smartbook / Electronic Book
 Tablet Device
 Portable DVD Players
 Docking Station
quality HDTV or VGA display without extra loading on
the processor. Also, by taking the advantage of the
framebuffer, the scaler can perform other image
manipulations including resizing and rotation.