This bit is set by hardware and cleared by software writing “1”.

swallow1029 提问时间：2012-3-7 20:32 /

This bit is set by hardware and cleared by software writing “1”.
这句话该怎么理解？感觉很是别扭。这位是由硬件置位，并由软件写 1 清除。这样理解对吗？如果是这样的话，那么硬件值 1 复位了，软件还怎么值1 呢？

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xiaodc88 回答时间：2012-3-7 20:37:27

回复:This bit is set by hardware and cleared by software writing “1”.

就是这么理解的，很多单片机都是这么操作的

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swallow1029 回答时间：2012-3-7 20:41:17

RE:This bit is set by hardware and cleared by software writing “1”.

我的意思是说既然由硬件来值 1 了，那么软件还怎么值 1 呢？
比如：
Bit 1 IWDGF: Independent Watchdog reset flag
This bit is set by hardware and cleared by software writing “1”.
0: No IWDG reset occurred
1: An IWDG reset occurred

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废鱼回答时间：2012-3-8 10:17:56

RE:This bit is set by hardware and cleared by software writing “1”.

软件写1是清除。

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swallow1029 回答时间：2012-3-8 12:00:44

RE:This bit is set by hardware and cleared by software writing “1”.

那如果是硬件值 1 呢？也是清楚吗？

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