我们用ad9851输出两个正交的两个余弦信号，是只要我们用同一个时钟信号给他们输入clk信号，然后单片机分别给他们控制就可以了吗，
我们用的是stc89c51，我们分别用p0和p2端口控制，单片机输出的控制信号给两片ad9851他有时间差，这个应该不会影响两块ad9851的相位输出吧
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