W99681CF Datasheet, PDF (8/78 Pages) Winbond – JPEG USB Dual Mode Camera Chip

W99681CF
2 FEATURES
q USB Interface
• Fully compliant with USB Specification Revision 1.1
• Supports for full speed devices with maximum 12 Mb/s USB bandwidth
• Uses no more than 8 Mb/s USB bandwidth to prevent saturation of the USB bus
• Provides multiple alternate settings for various isochronous bandwidth consumptions
• Does not use isochronous bandwidth for default alternate setting 0
• Complies with USB power management requirements
• USB Control and Isochronous transfers
• On-chip USB full speed transceivers
• Bus-powered high power devices
q Video Compression
• Fully compliant with ISO/IEC 10918-1 international JPEG standard
• On-chip DCT, quantization, zig-zag scan, and Huffman encoder
• Contains two AC and two DC Huffman code tables, and two programmable quantization tables
• Supports baseline sequential mode in YCbCr4:2:2 or YCbCr4:2:0 non-interleaved scan
• Encodes in sub-QCIF (128x96), QCIF (176x144), CIF (352x288), SIF (352x240), 320x240, or VGA
(640x480) picture format
• Encodes sub-QCIF/QCIF/CIF/SIF/320x240 format at 30 frames per second (fps), VGA format at
10~15 fps
q Video Pre-processing
• Direct connect to digital camera through an 8- or 16-bit data bus
• Glueless interface to NTSC/PAL TV decoder
• Input video format compliant with YCbCr 4:2:2 CCIR 601 standard
• Built-in cropping, arbitrary scaling, and filtering functions for digital pan and zoom camera control
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