The SN9C5256 is a USB 2.0 High-Speed (HS) compatible PC camera controller. The low power design provides extreme low consumption on device standby, operation and even high performance state. The low thermal design gets the module operating temperature inside platform under reasonable range. The SN9C5256 is fully compliant with USB Video Class. The OS systems supported are including Windows XP, Windows Vista, Windows 7 and the coming Windows 8. 

 

The new generation image signal processing engine brings sight video experience. The high performance Motion-JPEG compression engine makes variant compression ratio to consider bandwidth requirement well which output MJPG data format. It is also a high performance and high speed transmission engine on YUV un-compression data format. With the integrated sensor interface and color processing engine, it can supports most available CMOS sensors that range from VGA to QXGA. It is controlled by the embedded micro-controller and the statistics for 3A (AE / AWB / AF) are built-in. 

 

To decrease the BOM cost and PCB area, the SN9C5256 integrates 2 voltage regulators for sensor power. One is for analog part and the other is for I/O power. Futhermore, the built-in Clock Synthesizer for performance and power saving makes an external crystal is not needed. 

 

To fully meet Ultrabook requirement, one of the most significant of SN9C5256 is to save power consumption 40% less than previous backends. The Low Power Management Sleep State(LPM L1) is supported to save power consumption for host controller. The QFN46 4.5x6.5mm package dimension is also for the thin design. 

 

The flexible architecture is consisted of mask ROM, internal RAM and external serial-flash which can stores the customized codes and parameters. With the highly-integrated firmware architecture and the developing kit provided by SONiX, it’s easy for 3rd party to fulfill customized features. 

 

 

 

2.1 System 

3.3V, 1.2V power supply are necessary (Core power 1.2V provide by Backend IC ) 

Extreme low power consumption, < 30mA when standby and < 0.5mA when suspend (Power consumption of sensor is not included) 

Built-in Clock Synthesizer for performance and power saving 

Built-in PLL for internal clock generation 

Using external serial flash to store customized code and data 

No external RAM needed 

1.8V output power source to supply CMOS sensor’s I/O power 

2.8V output power source to supply CMOS sensor’s analog power(2.7V~3.3V control by FW setting) 

QFN package of 46-pins 

 

USB 2.0 high-speed and full-speed compatible 

USB Video Class 1.1 compliant 

USB2.0 HS/FS auto sense and switch 

USB FS mode and USB disconnection are programmable 

USB Low Power Management Sleep State with RTD3 

4 endpoints: CONTROL pipe, UVC Interrupt IN and Isochronous-IN (video, 24MB/s max) 

6 alternate settings for Video Streaming Interface 

 

Support QXGA(3.0MP, 2048x1536), FHD(2.0MP, 1920x1080), UXGA(2.0MP, 1600x1200), SXGA(1.3MP, 1280x1024), HD(1.0MP, 1280x720), VGA(0.3MP, 640x480) CMOS ISP sensor 

Support YUY2 and RAW (Bayer-Pattern) image data format from sensor 

Output clock: 480/(m*n) MHz output clock request of CMOS sensor silicon. 

Up to 96Mhz pixel clock is acceptable 

Support industrial standard 2-wire serial interface for sensor control 

 

AE histogram statistics 

AWB window statistics 

AF edge window statistics 

On-the fly defect-pixel cancellation 

Lens shading compensation for R/G/B channel 

Low pass filter 

Individual digital color gain control for R/Gr/Gb/B channels 

Individual digital color gain control for Y/Cb/Cr channels 

Pixel offset (optical black) compensation for R/Gr/Gb/B channels 

Programmable gamma table for RGB channels 

Programmable color conversion matrix for R/G/B input 

Configurable noise reduction 

De-color aliasing in Edge 

Configurable edge enhancement 

Programmable gamma table for Y channel 

Configurable windowing function after processed image 

Programmable hue and saturation 

Auto Gamma for backlight preview 

Auto Frequency for MSOC 

 

Scale down on Y/Cb/Cr 

For QXGA / UXGA / SXGA / VGA sensors, combined scaling and windowing function provides similar view angle for QXGA / FHD / UXGA / SXGA / HD / SVGA / VGA / CIF / QVGA / QCIF / QQVGA output format 

Fine scaling(128/m, m:128 ~ 2047) 

 

JPEG YUV422 baseline format 

Built-in JPEG encoder support USB Video Class MJPEG payload 

128 bytes quantization tables for Y and C provide programmable compression ratio 

 

Output video / still image format: 

      USB Video Class Uncompressed YUY2 payload (16bits/pixel) 

      USB Video Class MJPG payload 

Video streaming up to 30fps@FHD at USB2.0 high-speed mode. 

Still Image capture up to QXGA and is able to support UVC still image capture method 1/2 

    

Frame rate considering USB bandwidth limitation 

                    Normal Resolution @ USB High-Speed 

 

Output format     QXGA    FHD   UXGA    SXGA    HD     SVGA    VGA      CIF      QVGA     QCIF 

 

YUY2                    3fps     5fps    6fps       9fps      12fps  25fps     30fps     30fps   60fps      60fps 

 

MJPEG                24fps    30fps  30fps     60fps     60fps 120fps   120fps   120fps  120fps  120fps 

  

Frame rate considering sensor characteristic The maximum frame rate is limited by how many fps that sensor can output under acceptable maximum pixel clock 

 

3 GPIOs are predefined as following functions including LED control, serial flash write protect, sensor reset. 

GPIO_3 internal pull low（H:MIPI;L:parallel）.. 

 

Built-in 8032 micro controller with 3K bytes data memory, and maximum CPU clock rate is 24MHz 

Load extended F/W up to 64KB from external serial flash. 

Load VID/PID, manufacturer, product and serial number string from external serial flash. 

Load UVC parameter definition from external serial flash. 

F/W is upgradeable from PC 

Force USB at FS mode / Force USB disconnect 

Interrupt at the end of H/W windowing 

CPU watch dog 

 

Brightness control (UVC defined) 

Contrast control (UVC defined) 

Hue control (UVC defined) 

Saturation control (UVC defined) 

Sharpness control (UVC defined) 

Gamma control (UVC defined) 

Privacy control (UVC defined) 

LED indicator on video streaming 

UVC Extension unit support 

 

Microsoft Windows XP 32bit SP2, Microsoft Windows XP 64bit, Microsoft Windows Vista 32bit, Microsoft Windows Vista 64bit, Microsoft Window 7 32bit,    Microsoft Window 7 64bit, Microsoft Window 8 

Mac - OS X 10.4.8 or later 

Linux with UVC driver (open source available at http://linux-uvc.berlios.de/) 






All of the above pictures are taken after matting the online showing, what you see is what you get.
 

Click or copy the link to free download the datasheet PDF file.

 

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