VB6851

VB6851 QXGA camera module with auto focus Data Brief Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 3.15 megapixel resolution sensor (2048 x 1536) Integrated auto-focus mechanism High level autofocus control interface 4 element lens Compact size: 8.5 mm x 8.5 mm x 5.9 mm Compatible with SMIA 1.0 profile 2 functional specification Video data interface - CCP2.0 Command interface - CCI Analog power supply from 2.4 V to 2.9 V Digital power supply from 1.7 V to 2.9 V On-board 10 bit ADC Integral EMC shielding and EMI reduction techniques Ultra low power standby mode Analog binning (2x2, 2x4) for low power video mode PC00 accelerator (e.g. STV0986 ) or application engine (e.g. STn8815) device can be incorporated in the phone system to run the algorithms in hardware. The specifications of these devices are contained in a separate document. The module design is optimized for both footprint and height. The auto-focus mechanism combined with a multi-element lens provides excellent image quality at focus distances from less than 10 cm to infinity. All external components, including the auto-focus actuator drivers, are integrated inside the camera module, apart from two CCI pull-up resistors. VB6851 offers an ultra low power consumption hardware standby mode consuming less than 30 µW (typ.). Description This databrief outlines a high performance 3.15 megapixel auto-focus camera module (VB6851) for use across a range of mobile phone handsets and accessories. It is designed to be used for both high quality stills capture and video modes. The module is SMIA 1.0 profile 2 compatible and is capable of generating raw bayer 3 MP images up to 20 fps. The VB6851 supports the CCI control and CCP 2.0 data interfaces. As different phone platforms have different baseband processors with varying capabilities, it may not be possible for all phones to support the associated image processing and auto-focus algorithms. Where the baseband cannot support this processing load, a separate hardware February 2008 Rev 1 1/4 www.st.com 4 For further information contact your local STMicroelectronics sales office. Overview VB6851 1 Figure 1. Overview System diagram Figure 2. Block diagram VB6851 EXTCLK XSHUTDOWN PLL and clock management Power Mgmt Power-on reset Readout Line SRAM X Decoder Column ADC 2056 x 1544 Pixel array VDIG DGND VCAP VANA AGND VB6851 3 megapixel auto-focus camera module EXTCLK XSHUTDOWN CCI (SLC + SDA) CCP 2.0 (CLKP CLKN) , STV0986 Imaging system controller or baseband or application processor (STn8815) GR SCL SDA Sensor control registers Dark Cal CLKP CLKN DATAP DATAN Scaling CCP2 TX Defect Correction Output De-rating Output Formatter Y Decoder Readout CCI Slave Column ADC X Decoder Line SRAM Table 1. Technical specifications Parameter Description 2048 x 1536 (QXGA) ST IMG175 process 1.75 µm x 1.75 µm + 81 dB + 24 dB (max) + 6 dB (max) 60 dB 36 dB (@ 100 lux) Analog: 2.4 V - 2.9 V Digital: 1.7 V - 1.9 V