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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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RM0312 数据表(PDF) 102 Page - STMicroelectronics |
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RM0312 数据表(HTML) 102 Page - STMicroelectronics |
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102 / 275 page  Timer overview RM0312 102/275 DocID022352 Rev 3 16 Timer overview The microcontroller has two types of TIM timers, two general purpose (TIM2/ TIM3), and one basic timer (TIM4). They have different features but are based on a common architecture. This makes it easier to design applications using the various timers (identical register mapping, common basic features). Although the timers do not share any resources, they can be linked together and synchronized. This section gives a comparison of the different timer features and glossary of internal timer signal names. Section 17: 16-bit general purpose timer (TIM2/TIM3) contains a full description of all the various timer modes. 16.1 Timer feature comparison Table 31. Timer characteristics Symbol Parameter Min. Typ. Max. Unit tw(ICAP)in Input capture pulse time 2 tMASTER tres(TIM) Timer resolution time 1 tMASTER ResTIM Timer resolution with 16-bit counter 16 bit Timer resolution with 8-bit counter 8 bit tCOUNTER Counter clock period when internal clock is selected 1tMASTER tMAX_COUNT Maximum possible count with 16-bit counter 65,536 tMASTER Maximum possible count with 8-bit counter 256 tMASTER Table 32. Timer feature comparison Timer Counter resol- ution Counter type Prescaler factor Capture/ compare chan- nels Comple- mentary outputs Repet- ition counter External trigger input External break input Timer synchr- onization/ chaining TIM2 & TIM3 (general purpose timers) 16-bit Up/down Any power of 2 from 1 to 128 2 None No 11 Yes TIM4 (basic timer) 8-bit Up Any power of 2 from 1 to 32768 00 0 |
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