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L9912 Datasheet(PDF) 73 Page - STMicroelectronics |
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L9912 Datasheet(HTML) 73 Page - STMicroelectronics |
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73 / 84 page  DocID029639 Rev 2 73/84 L9912 SPI interface 83 13.4.14 DFM PWM DUTY CYCLE register [0x05] This register is used to configure DFM duty cycle [5.3.6]. The duty cycle resolution changes according to the frequency: Example: at 275 Hz, to apply a 37% duty cycle the value to write is 168 thus obtaining an effective duty cycle of 36.9%. Table 56. DFM PWM DUTY CYCLE register [0x05] Bit Register name Reset value Description 13-10 Reserved -- 9-0 DFM_DC_PERC 0 Duty cycle value (see next table) Table 57. Duty cycle resolution changes according to the frequency Frequency (Hz) 100% value Resolution % Frequency (Hz) 100% value Resolution % 100 625 1.6 275 455 2.19 125 500 2 300 833 1.2 150 417 2.39 325 770 1.29 175 357 2.8 350 715 1.39 200 625 1.6 375 668 1.49 225 555 1.8 400 625 1.6 250 500 2 |
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