TI 收购流明MCU，继承来的定时器外设计，有点奇葩。。。

Timer A Pre-scale
This register allows software to extend the range of the timers when they are used individually.
When in one-shot or periodic down count modes, this register acts as a true prescaler for the timer
counter.
When acting as a true prescaler, the prescaler counts down to 0 before the value in TAR and TAV
registers are incremented.


。。。。。。。。。。。。

很多年前的事情了

可是新版本的MCU还是在用的  不过增加定时器位数，也算是小特色吧。。。貌似STM32 TIM强大多了。。