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TMS320F28388D: 关于tformat绝对值通讯功能的问题

Part Number: TMS320F28388D

我程序里面有一个125us的中断,如果一次中断通过tformat去与绝对值电机去通讯,通讯会出错,数据校验不通过,但是如果是两个中断周期,也就是250us去通讯的话,就通讯正常。请问ti的工程师,Tformat的通讯周期最小是多少呢?