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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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ATMEGA8-16PU Fiches technique(PDF) 95 Page - ATMEL Corporation |
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ATMEGA8-16PU Fiches technique(HTML) 95 Page - ATMEL Corporation |
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95 / 308 page  95 2486T–AVR–05/08 ATmega8(L) output will be continuously low and if set equal to TOP the output will be set to high for non- inverted PWM mode. For inverted PWM the output will have the opposite logic values. If OCR1A is used to define the TOP value (WGM13:0 = 9) and COM1A1:0 = 1, the OC1A output will toggle with a 50% duty cycle. Timer/Counter Timing Diagrams The Timer/Counter is a synchronous design and the timer clock (clk T1) is therefore shown as a clock enable signal in the following figures. The figures include information on when Interrupt Flags are set, and when the OCR1x Register is updated with the OCR1x buffer value (only for modes utilizing double buffering). Figure 41 shows a timing diagram for the setting of OCF1x. Figure 41. Timer/Counter Timing Diagram, Setting of OCF1x, no Prescaling Figure 42 shows the same timing data, but with the prescaler enabled. Figure 42. Timer/Counter Timing Diagram, Setting of OCF1x, with Prescaler (f clk_I/O/8) Figure 43 shows the count sequence close to TOP in various modes. When using phase and frequency correct PWM mode the OCR1x Register is updated at BOTTOM. The timing diagrams clk Tn (clk I/O/1) OCFnx clk I/O OCRnx TCNTn OCRnx Value OCRnx - 1 OCRnx OCRnx + 1 OCRnx + 2 OCFnx OCRnx TCNTn OCRnx Value OCRnx - 1 OCRnx OCRnx + 1 OCRnx + 2 clk I/O clk Tn (clk I/O/8) |
Numéro de pièce similaire - ATMEGA8-16PU |
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Description similaire - ATMEGA8-16PU |
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