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视频AD—TVP5150A



您好,我想咨询一下关于视频采集AD-TVP5150的问题,想问一下,AD的系统时钟输出引脚SCLK的输出是在芯片正常供电的情况下就会输出是吧,我看寄存器的默认值是默认输出且为27Mhz,但是我测试了一下检测到的信号不是27M,信号不规则,频率随机。我利用的外部晶振14.31818M。想确认一下芯片是正常供电就有时钟输出吗