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TMS320F280025C: 选择EXTSYNCIN1作为外部同步源延时问题

Part Number: TMS320F280025C

在开发板上调试外部同步源时发现,使用GPIO8产生100kHz-1%duty的PWM,同时通过INPUT5SELECT路由作为PWM1的外部同步源时,测试发现PWM1A较GPIO8上升沿延时了约80ns。

同时使用了下图的TI例程时,例程测试依旧也有60-80ns延时。

这个延时如何产生?能否消除?