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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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STM8S Fiches technique(PDF) 181 Page - STMicroelectronics |
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STM8S Fiches technique(HTML) 181 Page - STMicroelectronics |
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181 / 467 page  DocID14587 Rev 14 181/467 RM0016 16-bit advanced control timer (TIM1) 261 Figure 76. Six-step generation, COM example (OSSR = 1) 17.5.8 Using the break function The break function is often used in motor control. When using the break function, the output enable signals and inactive levels are modified according to additional control bits (MOE, OSSR and OSSI bits in the TIM1_BKR register). When exiting from reset, the break circuit is disabled and the MOE bit is low. The break function is enabled by setting the BKE bit in the TIM1_BKR register. The break input polarity can be selected by configuring the BKP bit in the same register. BKE and BKP can be modified at the same time. Because MOE falling edge can be asynchronous, a resynchronization circuit has been inserted between the actual signal (acting on the outputs) and the synchronous control bit (accessed in the TIM1_BKR register). It results in some delays between the asynchronous and the synchronous signals. For example, if MOE is written to 1 after it has been low, a delay (dummy instruction) must be inserted before it can be read correctly. |
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