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dsp c5517 关于CLKIN输入类型的源是最好的,还有幅度?

Expert 2137 points
Other Parts Discussed in Thread: TMS320C5517

我现在项目用的是19.2mhz的 温补晶振,0.5ppm,用两个dsp 都只有定时器在工作,发现随着时间越长,两个的误差越大(10分钟就有50ms左右的误差)。

我想请教您CLKIN我用的类型的输入源最好还有幅度的要求,要能实现两个dsp在运行,定时器跑半小时,误差不能超过2ms.