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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT90PWM3 датащи(PDF) 124 Page - ATMEL Corporation |
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AT90PWM3 датащи(HTML) 124 Page - ATMEL Corporation |
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124 / 361 page  124 4317J–AVR–08/10 AT90PWM2/3/2B/3B Note: 1. A special case occurs when OCRnA/OCRnB equals TOP and COMnA1/COMnB1 is set. See “Phase Correct PWM Mode” on page 117. for more details. • Bit 1:0 – WGMn1:0: Waveform Generation Mode Combined with the WGMn3:2 bits found in the TCCRnB Register, these bits control the counting sequence of the counter, the source for maximum (TOP) counter value, and what type of wave- form generation to be used, see Table 15-5. Modes of operation supported by the Timer/Counter unit are: Normal mode (counter), Clear Timer on Compare match (CTC) mode, and three types of Pulse Width Modulation (PWM) modes. (See “16-bit Timer/Counter1 with PWM” on page 102.). 01 WGMn3:0 = 8, 9 10 or 11: Toggle OCnA on Compare Match, OCnB disconnected (normal port operation). For all other WGM1 settings, normal port operation, OC1A/OC1B disconnected. 10 Clear OCnA/OCnB on Compare Match when up- counting. Set OCnA/OCnB on Compare Match when downcounting. 11 Set OCnA/OCnB on Compare Match when up- counting. Clear OCnA/OCnB on Compare Match when downcounting. Table 15-4. Compare Output Mode, Phase Correct and Phase and Frequency Correct PWM (1) COMnA1/COMnB1 COMnA0/COMnB0 Description Table 15-5. Waveform Generation Mode Bit Description (1) Mode WGMn3 WGMn2 (CTCn) WGMn1 (PWMn1) WGMn0 (PWMn0) Timer/Counter Mode of Operation TOP Update of OCRn x at TOVn Flag Set on 0 0 0 0 0 Normal 0xFFFF Immediate MAX 1 0 0 0 1 PWM, Phase Correct, 8-bit 0x00FF TOP BOTTOM 2 0 0 1 0 PWM, Phase Correct, 9-bit 0x01FF TOP BOTTOM 3 0 0 1 1 PWM, Phase Correct, 10-bit 0x03FF TOP BOTTOM 4 0 1 0 0 CTC OCRnA Immediate MAX 5 0 1 0 1 Fast PWM, 8-bit 0x00FF TOP TOP 6 0 1 1 0 Fast PWM, 9-bit 0x01FF TOP TOP 7 0 1 1 1 Fast PWM, 10-bit 0x03FF TOP TOP 8 100 0 PWM, Phase and Frequency Correct ICRn BOTTOM BOTTOM 9 100 1 PWM, Phase and Frequency Correct OCRnA BOTTOM BOTTOM 10 1 0 1 0 PWM, Phase Correct ICRn TOP BOTTOM 11 1 0 1 1 PWM, Phase Correct OCRnA TOP BOTTOM 12 1 1 0 0 CTC ICRn Immediate MAX 13 1 1 0 1 (Reserved) – – – 14 1 1 1 0 Fast PWM ICRn TOP TOP 15 1 1 1 1 Fast PWM OCRnA TOP TOP |
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