EM2750 USB2.0 Video Controller is a highly integrated System IC that provides a cost-effective solution for video capture application. EM2750 supports 1.3M, 2M and 3M pixels sensors. As illustrated in a PC-camera requires only three chips: CMOS imager, EM2750 and AC 97 codec. Application of such a system can be video conference, video mail.

As shown in the functional block diagram, the EM2750 consists of 5 main blocks

Video/Audio Input Port

USB 2.0 Transceiver

GPIO, Two Wire Serial Bus, AC 97 Interface

USB 2.0 Serial Interface Engine

Stream Buffer

No external memory required

Flexible Video Input Port

8-bit video input port

Support up to 3 M pixel CMOS sensor in Bayer RGB format

Interlace and non-interlace video

CCIR-601 4:2:2 YUV with external sync and field ID

CCIR-656 YUV with embedded sync and field ID

Programmable Video Timing Generator

Generate clock, H-sync and V-sync for CMOS sensor

Bayer RGB Color Processor

Black clamping

Gamma correction

Bayer pattern filtering

Gain and offset adjustment in RGB space

9-window image statistics collection for auto exposure and auto white balance

Defect pixel compensation

YUV Color Processor

Gain and offset adjustment in YUV space

Sharpness enhancement

Video Scaler

Random-ratio down scaling in X and Y directions

High fidelity color reproduction by the scaler

Audio Interface

Support AC97 CODEC

Support I2S device

Software direct access to AC97 CODEC registers

Support audio sample rates of 48K, 44.1K, 32K, 22.05K, and 8K.

Support USB Audio Class control and streaming

USB Port

Integrated USB 2.0 PHY with High-Speed and Full-Speed Transceivers

Second generation USB 2.0 PHY with reduced power

USB 2.0 and 1.1 compliant

Support Iso-chronous audio pipe up to 0.2 MB/sec

Support Iso-chronous video pipe up to 30 MB/sec

Support Iso-chronous transport stream pipe up to 3 MB/sec

EEPROM Interface

Support 256, 512, 1024 or 2048-byte 2-wire serial EEPROM

Use EEPROM to store chip configurations and USB descriptors

Customized Vendor ID and Product ID

Customized Vendor String, Product String, and Serial Number String

Software may use EEPROM to store board configurations

Software may use EEPROM to store defect pixel coordinates

Miscellaneous

2-wire serial bus to program front-end video/audio devices

Power-down control to front-end video/audio devices

8 General-Purposed I/O ports

Snap shot button input

LED control output

0.22 micron, 2.5V Core, 3.3V I/O CMOS process

64-pin LQFP package