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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STMPE812ABJR датащи(PDF) 29 Page - STMicroelectronics |
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STMPE812ABJR датащи(HTML) 29 Page - STMicroelectronics |
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29 / 53 page  STMPE812A PWM controller Doc ID 18225 Rev 4 29/53 PWM control1 register PWM control1 register Address: 0x51 Type: R/W Reset: 0x00 Description: PWM control1 register. 7654 3 2 1 0 Brightness BurstMultiplier Off_State Enable 00 0 0 [7:4] This defines the of the PWM channel output which in turn determines the brightness level of the LED that the PWM output drives. Note that this is assuming LED is connected in SINKING MODE. System host should program the brightness in a reverse way if sourcing configuration were to be used. 0000: duty cycle ratio 1:15 (6.25%, minimum brightness) 0001: duty cycle ratio 2:14 (12.50%) 0010: duty cycle ratio 3:13 (18.75%) 0011: duty cycle ratio 4:12 (25.00%) 0100: duty cycle ratio 5:11 (31.25%) 0101: duty cycle ratio 6:10 (37.50%) 0110: duty cycle ratio 7: 9 (43.75%) 0111: duty cycle ratio 8: 8 (50.00%) 1000: duty cycle ratio 9: 7 (56.25%) 1001: duty cycle ratio 10: 6 (62.50%) 1010: duty cycle ratio 11: 5 (68.75%) 1011: duty cycle ratio 12: 4 (75.00%) 1100: duty cycle ratio 13: 3 (81.25%) 1101: duty cycle ratio 14: 2 (87.50%) 1110: duty cycle ratio 15: 1 (93.75%) 1111: duty cycle ratio 16: 0 (100.00%, maximum brightness) [3:2] BurstMultiplier PWM output continues for time = BurstLength * BurstMultiplier *If BurstMultiplier = 0, PWM output indefinitely (until PWM is turned OFF) 1 Off_State ‘0’ : PWM Output “HI” when PWM not running ‘1’ : PWM Output “LOW” when PWM not running 0Enable Writing ‘1’ to this bit starts the PWM controller sequence Writing ‘0’ has stops it Reads ‘1’ when PWM is running. |
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