PXA3xx Design Guide - Marvell

16 Quick Capture InterfaceThis section describes guidelines for connecting camera image sensors and sensor modules to thePXA3xx processor family Quick Capture Interface. The PXA3xx processor family supports a varietyof operating modes, data widths, formats, and clocking schemes. Only a subset of these modes aredescribed in this section. For further details, see Marvell ® PXA30x, PXA31x, and PXA32xProcessors Vol. III: Graphics and Input Controller Configuration Developers Manual, “Section 3:Quick Capture Interface”.16.1 Overview16.2 SignalsThe Quick Capture Interface is intended for use in a PDA or mobile phone product that requiresimage-capture capability. Some common usage scenarios include:• Capturing simple still images, sharing images using email, and sending images to a web photofinisher• Using images for “pictures-as-information”• Capturing video clips• Providing a two-way video conference• Performing “text imaging” (scanner/OCR)The Quick Capture Interface modes typically include, but are not limited to:• Image preview - full screen, with limited color, minimal lag• Still image capture - 640x480 up to 5 megapixel resolution (PXA31x processor), up to 3megapixel resolution (PXA30x processor)• Video capture - 320x240 resolution• Two-way video conference:• Displays own window at 1/4 of screen size• Displays other party’s window at full screen, 15 or 30 fps (frames per second)See Table 53 for the list of signals used by the Quick Capture Interface.Table 53:Signal Descriptions for Quick Capture InterfaceSignalNameTypeDescriptionC_DD[9:0] Input Data lines to transmit 8 or 10 bits at a timeC_MCLK Output Programmable output clock used by the camera capture sensorC_PCLK Input Pixel clock used by the quick capture interface of the camera to clock the pixel data into theinput FIFOC_LV I/O Line start or alternate synchronization signal used by the sensor to signal line read-out or asan external horizontal synchronizationC_FV I/O Frame start or alternate synchronization signal used by the sensor to signal frame read-outor as an external vertical synchronizationCopyright © 2009 MarvellDoc. No. MV-S301368-00 Rev. AApril 6, 2009, Released Page 133