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HV7161SPA2 Datasheet(PDF) 46 Page - List of Unclassifed Manufacturers |
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HV7161SPA2 Datasheet(HTML) 46 Page - List of Unclassifed Manufacturers |
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46 / 72 page  HV7161SPA2 CMOS Image Sensor Confidential With Image Signal Processing This document has a general product description and is subject to change without notice. MagnaChip Semiconductor Ltd. does not assume any responsibility for use of circuits described and no patent licenses are implied. - 46 - 2005 MagnaChip Semiconductor Ltd. Anti-Banding Mode When Anti-Banding is enabled, AE initializes Integration Time registers[73h- 75h] to 2 x Anti-Banding Step value[7ah-7ch], and integration increment/decrement amount is set to Anti-Banding Step value in order to remove banding noise caused by intrinsic energy waveform of light sources. Banding noise is inherent in CMOS image sensor that adopts rolling shutter scheme for image acquisition. In this mode, AE operates with very large unit, typically a reciprocal of (2 x power line frequency), so that minute integration time tuning is not liable. Therefore, this mode is recommended for only indoor use. Anti-Banding Min. Break When AE is still of out lock state despite that AE preamp analog gain update value exceeds preamp minimum gain value(18h) and integration time(73h- 75h) is reached to AE Anti-Banding Step(7ah-7ch), integration time(73h-75h) is broken to less than AE Anti-Banding Step(7ah-7ch). AE Window Enable AE window mode enables. With this bit set to high, window mode is discarded and full image data is accounted for AE Y frame mean evaluation. Time Speed (fast)11 – 10 – 01 – 00(slow) 11 Gain-Only control mode. Only preamp gain is controlled to get optimum exposure state. 10 Time-Only control mode. Only integration time is controlled to get optimum exposure state. 01 Time-Gain control mode. Integration time and preamp gain are controlled to get optimum exposure state. AE Mode 00 AE function is disabled AE Mode Control 2 [AEMODE2 : 71h : edh] 7 6 5 4 3 2 1 0 Gain Speed 1 Gain Speed 2 Time Fine Tune Gain Fine Tune Digital Gain Control Analog Gain Control 1 1 1 0 1 1 0 1 Gain Speed1 This value means the speed of pre-amp. Gain changed when the environment condition moves rapidly from low luminance to high luminance. Gain Speed2 Gain update speed is specified as follows at the normal condition. (fast)11 – 10 – 01 – 00(slow) Time Fine Tune Integration time fine tuning is performed when AE arrive around AE Fine Tune Boundary to settle into AE lock state smoothly. Gain Fine Tune Amp gain fine tuning is performed when AE arrive around AE Fine Tune Boundary to settle into AE lock state smoothly. |
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