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AK8855VG Datasheet(PDF) 1 Page - Asahi Kasei Microsystems |
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AK8855VG Datasheet(HTML) 1 Page - Asahi Kasei Microsystems |
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1 / 81 page  [ASAHI KASEI] AK8855 MS0319-E-03 1 2004 / 11 AK8855 NTSC/PAL Digital Video Decoder General Description The AK8855 decodes the NTSC, PAL Composite Video signal into Digital code. Outputs are ITU-R BT. 601 Level compatible Y, Cb and Cr signals. Decoded results are scaled to QVGA/CIF sizes etc.. Output interface is camera-interface in ITU-R BT.656-alike output format. When such information as Closed Caption, VBID, WSS are encoded on the Video signal, each code can be read out externally. When the Macrovision signal is super-imposed, its information can also externally be read out. Features • NTSC-M / PAL- B, D, G, H, I Composite signal decoding process • 2-CH input acceptable (selector is integrated on-chip ) • On-chip 10 Bit ADC (operation at 24.5454 MHz or 27 MHz ) • Fixed clock Sampling • On-chip PLL ( 27 MHz clock generation from 24.5454 MHz ) • On-chip Quartz Crystal Oscillator circuit • Pixel Position Correction function • Selectable Picture sizes (QVGA / VGA / QCIF / CIF / 601 ) - Rotated Picture Mode output available (ex. QVGA : 240 X 180 ) • Selectable Output rate (525 : 30 / 15 / 7.5 625 : 25 / 12.5 / 6.25 [ frames / sec ] ) • On-chip Anti-Aliasing Filter • On-chip PGA ( 0 dB ~ 12 dB ) • Auto Color Control (ACC) function • Adaptive Auto Gain Control (AGC) function • Primary YC Separation • Output Interface - ITU-R BT.656-alike output format (4:2:2 8 Bit parallel output with EAV / SAV ) * * depending on the input signal quality, ITU-R BT. 656 compatible output may not be available. - Camera Interface - Interface by HD / VD / DVALID signals • Closed Caption decoding function ( to be output by register setting ) • VBID ( CGMS-A ) decoding function ( CRCC decode ) ( to be output by register setting ) • WSS decoding function ( to be output by register setting ) • Macrovision signal detect function • Power-down function • I2C Control compatible • Internal operating power supply 2.7 V ~ 3.3 V • supplying I / F Power Supply ( 1.6 V ~ 2.0 V or 2.7 V ~ 3.3 V ) • Package 57 FBGA |
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