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HT66F40 数据表(PDF) 79 Page - Holtek Semiconductor Inc |
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HT66F40 数据表(HTML) 79 Page - Holtek Semiconductor Inc |
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79 / 244 page  HT68F20/HT68F30/HT68F40/HT68F50/HT68F60 HT68FU30/HT68FU40/HT68FU50/HT68FU60 Rev. 1.60 79 October 24, 2011 Timer Modules - TM One of the most fundamental functions in any microcontroller device is the ability to control and mea- sure time. To implement time related functions each de- vice includes several Timer Modules, abbreviated to the name TM. The TMs are multi-purpose timing units and serve to provide operations such as Timer/Counter, In- put Capture, Compare Match Output and Single Pulse Output as well as being the functional unit for the gener- ation of PWM signals. Each of the TMs has either two or three individual interrupts. The addition of input and out- put pins for each TM ensures that users are provided with timing units with a wide and flexible range of fea- tures. The common features of the different TM types are de- scribed here with more detailed information provided in the individual Compact, Standard and Enhanced TM sections. Introduction The devices contain from two to four TMs depending upon which device is selected with each TM having a reference name of TM0, TM1, TM2 and TM3. Each indi- vidual TM can be categorised as a certain type, namely Compact Type TM, Standard Type TM or Enhanced Type TM. Although similar in nature, the different TM types vary in their feature complexity. The common fea- tures to all of the Compact, Standard and Enhanced TMs will be described in this section, the detailed opera- tion regarding each of the TM types will be described in separate sections. The main features and differences between the three types of TMs are summarised in the accompanying table. Function CTM STM ETM Timer/Counter ÖÖÖ I/P Capture ¾Ö Ö Compare Match Output ÖÖÖ PWM Channels 1 1 2 Single Pulse Output ¾ 12 PWM Alignment Edge Edge Edge & Centre PWM Adjustment Period & Duty Duty or Period Duty or Period Duty or Period TM Function Summary Each device in the series contains a specific number of either Compact Type, Standard Type and Enhanced Type TM units which are shown in the table together with their individual reference name, TM0~TM3. Device TM0 TM1 TM2 TM3 HT68F20 10-bit CTM 10-bit STM ¾¾ HT68F30 10-bit CTM 10-bit ETM ¾¾ HT68F40 10-bit CTM 10-bit ETM 16-bit STM ¾ HT68F50 10-bit CTM 10-bit ETM 16-bit STM 10-bit CTM HT68F60 10-bit CTM 10-bit ETM 16-bit STM 10-bit CTM TM Name/Type Reference |
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