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TMS320F280034: blanking window 是在什么时刻更新?是否可以配置更新时刻

Part Number: TMS320F280034

请问, blanking window 是在什么时刻更新?是否可以配置更新时刻。

从测试来看像是立即更新,这样的话,与CMP值(shadow register)更新就不同步了。

我想滤除关断时刻的干扰,如果blanking window先减小而CMP值还比较大,那就存在一定周期失去了滤除干扰的效果。

求解答,谢谢!