OV7725学习

The OV7725 sensor is a high performance 1/4-inch, single-chip VGA camera and image processor in a small footprint package. Operating at full functionality, the OV7725 meets all PC multimedia and cameraphone market requirements in terms of performance, quality and reliability. The low power OV7725 excels in low light conditions and can operate in a wide temperature range, from -20°C to +70°C.

The OV7725 incorporates a 640 x 480 image array, capable of operating at 60 frames per second in VGA mode with complete user control over image quality, formatting and output data transfer.

鹰眼摄像头
1.高达150HZ的帧频率。 // 6.6ms
2.硬件二值化。
3.BGA封装

http://www.tuicool.com/articles/jUBna2Z

场中断和PCLK_需要在单片机端下拉150欧电阻，以便增强抗干扰性

像头采集数据是一行一行采集的，当采集完一行的图像之后就触发行中断信号，比如360*240的像素，总的240行，当240行全部采集完了之后就触发场中断，所谓的场就是整张图像全部采集。。

注意HREF与HSYNC的区别

下划线防止宏重名，约定熟成

山外鹰眼（硬件二值化）、山外灰眼（灰度ov7620）、山外狼眼（灰度ov7725）