SN9C259BFG SONIX USB2.0 camera controller, supports VGA(640x480)@30fps, SXGA(1024x768), UXGA(1900x1200) and QXGA(2048 x 1536)@3.5fps resolution, Very low power consumption < 49mA on standby
VSN9C259BFG datasheet, SONIX USB2.0 camera controller, SONIX USB camera IC, VGA, SXGA, UXGA and QXGA resolution camera controller, Very low power USB camera IC
1 SN9C259 General Description
SN9C259 is a USB 2.0 compatible PC Camera controller. The built-in extreme low-power transceiver provides the superior compatibility with various USB host and the best quality for image applications. It is fully compliant with USB Video and Audio Class. With the integrated sensor interface and color processing engine, it can support up to QXGA CMOS SOC sensors. SN9C259 integrates 2 voltage regulators for sensor power. One is 3.3V-to-2.8V for sensor’s analog parts. The other one is 3.3V-to-1.9V for sensor’s core power. These build-in regulators can help saving BOM cost and PCB area. SN9C259 is controlled by the embedded micro-controller. The flexible architecture is consisted of mask ROM, internal RAM and external serial-flash which can store the customized codes and parameters. It’s also possible to store all the program code in the external flash memory for customized design purpose. With the highly-integrated firmware architecture and the developing kit provided by SONiX, it’s easy for 3rd party to integrate a new type of CMOS sensor and GPIO definition for variant board configuration.
2 SN9C259 Features
2.01 System
● 3.3V single power supply, 1.8V Core (generated by internal regulator)，1.8V and 3.3V I/O power
● Extreme low power consumption, < 49mA when standby and < 400uA when suspend (Power consumption of sensor is not included，audio enable)
● Built-in PLL for internal clock generation with input crystal frequency of 12MHz
● Using external serial flash to store customized code and data
● No external RAM needed
● 1.9V and 2.8V output power pin to supply CMOS sensor power need
● LQFP48 & QFN46 package is available; please see later section for more detail
2.02 USB Controller
● USB 2.0 compatible
● USB Video Class 1.1 compliant
● USB2.0 HS/FS auto sense and switch
● USB FS mode and USB disconnection are programmable
● 5 endpoints: CONTROL pipe, 2 Interrupt IN and 2 Isochronous-IN (Video in and Audio in)
● 6 alternate settings for Video Streaming Interface
2.03 SN9C259 Sensor Interface
● Support VGA、SXGA、UXGA and QXGA CMOS ISP sensor
● Raw Bypass Mode（LQFP48：RAW-10 / RAW-8，QFN46：RAW-8），requires SONIX driver
● MJPG Bypass Mode and support MJPEG Header output from ASIC
● Support YUY2 image data format from sensor
● Up to 48Mhz output clock for clock request of CMOS sensor silicon.
● Up to 96Mhz pixel clock is acceptable
● Support industrial standard 2-wire serial interface for sensor control
● Support two sensor modes of PCK synchronization and Buffer synchronization
2.04 Image Processing
● Configurable windowing function after sensor output
2.05 Color processing
● AF edge statistics
● Programmable gamma table for Y channel
● Configurable windowing function after processed image
2.06 SN9C259 Scaling Engine
● 1/2, 1/4 smooth scaling on Y/Cb/Cr
● 3/5 second linear scaling for VGA input
2.07 Video / Still Image
● Output video / still image format:
● USB Video Class Uncompressed YUY2 payload (16bits/pixel)
● Video streaming up to 30fps@VGA or 3.5fps@QXGA at USB2.0 high-speed mode
● Still Image capturing support UVC still image capture method 0/1/2
2.08 Frame rate
● Frame rate considering sensor characteristic
The maximum frame rate is limited by how many frame per second that sensor can output under 48MHz pixel clock and is limited on High-Speed USB ISO bandwidth 24MB/s
2.09 SN9C259 Audio
● USB Audio Class 1.0 standard compliant
● Programmable audio sampling frequency: 8, 11.025, 16, 22.05, 24, 44.1 and 48 kHz
● Build-In one channel 16 bits ADC
● 16-bit PCM format output to UAC
● Audio performance
● gain = 0dB: SNR = 74dB, THD+N = 0.021% (input is -3dB)
● gain = 52.5dB: SNR = 46dB, THD+N = 0.5% (input is -54dB, about 2mV)
● PGA gain range from -12dB to 33dB at 3dB step
MIC BOOST gain range from 0~30dB and 4 steps
● Digital volume control / mute: -78dB…0dB
2.10 SN9C259 GPIO
● 3 GPIOs are available, predefined as LED、snapshot button and sensor reset pin
2.11 Micro Controller and USB Device Features
● Built-in 8032 micro controller with 3K bytes data memory, and maximum CPU clock rate is 24MHz
● Total 64K bytes mask ROM and 4K bytes programmable SRAM
● Load extended 18KB F/W 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
2.12 Pre-Defined for USB Video Class
● 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)
● Image auto-flip control triggered by GPIO
● LED indicator on video streaming
● Extension unit support
2.13 SN9C259 Platform Support
● Microsoft Windows XP 32bit SP2, Microsoft Windows XP 64bit, Microsoft Windows Vista 32bit, Microsoft Windows Vista 64bit, Microsoft Windows 7 32bit, Microsoft Windows 7 64bit
● Mac - OS X 10.4.8 or later
● Linux with UVC driver (open source available at http://linux-uvc.berlios.de/)
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