CH7303

Features:

• Digital Visual Interface (DVI) Transmitter up to 165M pixels/second
• DVI low jitter PLL
• DVI hot plug detection
• Analog YPrPb outputs for HDTV
• HDTV support for 480p, 576p, 720p, 1080i and 1080p
• MacrovisionTM copy protection support for HDTV
• Programmable digital input interface supporting RGB (15, 16, 24 or 30 bit) and YCrCb input data formats
• Can output either RGB or YPrPb
• TV / Monitor connection detect
• Programmable power management
• Three 10-bit video DAC outputs
• Fully programmable through serial port
• Complete Windows and DOS driver support
• Low voltage interface support to graphics device
• Offered in a 64-pin LQFP package
• Backward pin compatible with CH7301 or CH7009/11
• Support three additional 15 bit multiplexed RGB Input Data Format (IDF 6,7.8)


Pinout




Specifications

Symbol	Description	Min	Typ	Max	Units
	All power supplies relative to GND	- 0.5		5.0	V
	Input voltage of all digital pins	GND - 0.5		VDD + 0.5	V
TSC	Analog output short circuit duration		Indefinite		Sec
TAMB	Ambient operating temperature	0		85
TSTOR	Storage temperature	- 65		150
TJ	Junction temperature			150
TVPS	Vapor phase soldering (1 minute)			220

Description

The CH7303 is a Display Controller device which accepts a digital graphics input signal, and encodes and transmits data through a DVI link (DFP can also be supported), VGA ports (analog RGB) or a HDTV port (YPrPb). The device is able to encode the video signals and generate synchronization signals for analog HDTV interface standards and graphics standards up to UXGA. The device accepts data over one 15-bit wide variable voltage data port which supports 9 different data formats including RGB and YCrCb.

The DVI processor includes a low jitter PLL for generation of the high frequency serialized clock, and all circuitry required to encode, serialize and transmit data. The CH7303 is able to drive a DFP display at a pixel rate of up to 165MHz, supporting UXGA resolution displays. No scaling of input data is performed on the data output to the DVI device.

In addition to DVI encoder modes CH7303, bypass modes are included which perform color space conversion to HDTV standards and generate and insert HDTV sync signals, or output VGA style analog RGB for use as a CRT DAC.