32-Bit Timer Mode Select Bit 可选Odd numbered and even numbered timers form separate 16-bit timers奇数和偶数定时器形成单独的16位定时器,以及Odd numbered and even numbered timers form a 32-bit timer奇数和偶数定时器组成一个32位定时器
Select Timer Clock Frequency 选择时钟源;
Timer Clock Frequency 时钟频率,计算得到,是分频后得到的值,定时器时钟;
Timer Period Unit 为定时器时间单位,可选millisecond、microsecond、nanosecond;也就是毫秒、微秒以及纳秒;