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TMS320F28388D: 关于IER的疑问

Part Number: TMS320F28388D


请问在The CPU saves its context on the stack.后,IER为什么会被清零呢 

如果清0,中断信号就和CPU断开了

Writes to IER and INTM are atomic operations.  IER和INTM是自动操作的,是指CPU会自动操作两个位吗 

我好像在手册中没有找到IER何时会再次被置1

这个位用的时候一般是初始化里设置IER为吧,如果save context后被清零0,需要用户添加指令使其再次置1

编码的时候我倒是一直没有再次改动过IER的状态