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AK8817 Datasheet(PDF) 27 Page - Asahi Kasei Microsystems |
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AK8817 Datasheet(HTML) 27 Page - Asahi Kasei Microsystems |
27 / 43 page ASAHI KASEI [AK8817/18] Rev.000E 27 2007 / 03 (15) On-chip Color Bar The AK8817 can output Color Bar signal. Color Bar signal to be generated has 100 % amplitude and 75 % Saturation levels. Color Bar signal is output by setting register. When to output Color Bar signal, there are 2 modes of operation – one is external Sync timing mode for normal operation, and the other is internal self-operation mode. In internal self-operating mode, required timing is internally generated automatically. Namely, it is no need to input synchronization timing from outside of the chip. Operation mode setting is done by Control 1 Register . When BBG-bit is set, BBG-bit is prioritized ( Black Burst is output ). Blanking Level 100%White Synctip Level The following values are code for ITU-R. BT601 WHITE YELLOW CYAN GREEN MAGENTA RED BLUE BLACK Cb 128 44 156 72 184 100 212 128 Y 235 162 131 112 84 65 35 16 Cr 128 142 44 58 198 212 114 128 (16) Black Burst Signal generation function The AK8817 can output Black Burst signal ( Black level output ). When to output Black Burst signal, there are 2 modes of operation – one is external Sync timing mode for normal operation , and the other is internal self-operation mode. In internal self-operation mode, required timing is internally generated automatically. Namely, it is no need to input synchronization timing from outside of the chip. When BBG-bit of [ Control 1 Register ] is set to “1”, same operation is processed as in the case where fixed-16 Y signal and fixed-128 Cb / Cr signal outputs are input. Operation mode setting is done by Control 1 Register setting. |
Similar Part No. - AK8817_07 |
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Similar Description - AK8817_07 |
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