说明：  OV7670/OV7171 CAMERACHIPTM图像传感器，体积小、 工作电压低，提供单片VGA摄像头和影像处理器的所 有功能。
(OV7670/OV7171 CAMERACHIPTM image sensor, small size, low voltage, providing single-chip VGA camera and image processor, all the features.)