基于ARM7 PWM定时器的图像传感器时序信号设计

Design of the timing signals of image sensor based on ARM7 PWM timer

图像传感器的正常工作需要为其提供一定时序要求的驱动信号。基于ARM7内部PWM定时器用软件编程的方法产生图像传感器的扫描起始信号S、扫描时钟信号准、扫描结束信号EOF等驱动时序信号。实验证明,产生的时序信号可用作图像传感器的驱动信号,实现图像传感器的正常工作。

In order to work normally for image sensors, the driving signals working in proper desiring sequence were needed. The scanning starting signal S, the scanning clock signal φ and the scanning ending signal EOF were generated by the software programming using ARM7 PWM timer. Experiment proved that the generated timing signals can be used as driving signals to drive the image sensors working.