1 Features

1• Integrated HDCP Cipher Engine with On-chip Key

Storage

• Bidirectional Control Interface Channel Interface

with I2C Compatible Serial Control Bus

• Supports High Definition (720p) Digital Video

Format

• RGB888 + VS, HS, DE and I2S Audio Supported

• 5 – 85 MHz PCLK Supported

• Single 3.3 V Operation with 1.8 V or 3.3 V

Compatible LVCMOS I/O Interface

• AC-coupled STP Interconnect up to 10 meters

• Parallel LVCMOS Video Inputs

• DC-balanced & Scrambled Data with Embedded

Clock

• Supports HDCP Repeater Application

• Dedicated Interrupt Pin for Remote Interrupts

• Internal Pattern Generation

• Low Power Modes Minimize Power Dissipation

• Automotive Grade Product: AEC-Q100 Grade 2

Qualified

• >8 kV HBM and ISO 10605 ESD rating

• Backward Compatible Modes

2 Applications

• Automotive Touch Screen Display

• Automotive Display for Navigation

• Rear Seat Entertainment Systems

3 Description

The DS90UH925AQ serializer, in conjunction with the

DS90UH926Q deserializer, provides a solution for

secure distribution of content-protected digital video

within automotive entertainment systems. This

chipset translates a parallel RGB Video Interface into

a single pair high-speed serialized interface. The

digital video data is protected using the industry

standard HDCP copy protection scheme. The serial bus scheme, FPD-Link III, supports video and audio

data transmission and full duplex control including

I2C communication over a single differential link.

Consolidation of video data and control over a single

differential pair reduces the interconnect size and

weight, while also eliminating skew issues and

simplifying system design.

The DS90UH925AQ serializer embeds the clock,

content protects the data payload, and level shifts the

signals to high-speed low voltage differential

signaling. Up to 24 RGB data bits are serialized along

with three video control signals and up to two I2S

data inputs.

EMI is minimized by the use of low voltage differential

signaling, data scrambling and randomization and spread spectrum clocking compatibility.

The HDCP cipher engine is implemented in the serializer and deserializer. HDCP keys are stored in

on-chip memory.

Remote interrupts from the downstream

DS90UH926Q deserializer are mirrored to a local

output pin.