https://blog.youkuaiyun.com/together8877zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/together8877/article/details/7856675https://blog.youkuaiyun.com/together8877/article/details/7856675together8877Sun, 12 Aug 2012 11:54:56 +0800https://blog.youkuaiyun.com/together8877/article/details/7856651https://blog.youkuaiyun.com/together8877/article/details/7856651together8877Sun, 12 Aug 2012 11:40:35 +0800 两种计数模式：单次减 1和连续减 1计数模式(软件设置,见控制寄]]>https://blog.youkuaiyun.com/together8877/article/details/7096451https://blog.youkuaiyun.com/together8877/article/details/7096451together8877Thu, 22 Dec 2011 19:35:18 +0800https://blog.youkuaiyun.com/together8877/article/details/6757245https://blog.youkuaiyun.com/together8877/article/details/6757245together8877Wed, 07 Sep 2011 16:23:30 +0800https://blog.youkuaiyun.com/together8877/article/details/6757233https://blog.youkuaiyun.com/together8877/article/details/6757233together8877Wed, 07 Sep 2011 16:22:10 +0800https://blog.youkuaiyun.com/together8877/article/details/6529211https://blog.youkuaiyun.com/together8877/article/details/6529211together8877Tue, 07 Jun 2011 11:35:00 +0800 设置 periodl 和 periodh 寄存器的初始值，这个值可以根据系统输入时钟和Initial period 中的设定值获得。当Writeable period 设置关闭时，周期保持固定且不能在运行中修改。　　Initial period ]]>