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ATmega169P датащи(PDF) 129 Page - ATMEL Corporation |
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ATmega169P датащи(HTML) 129 Page - ATMEL Corporation |
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129 / 393 page ![]() 129 8018N–AVR–08/09 ATmega169P Table 15-3 shows the COM1x1:0 bit functionality when the WGM13:0 bits are set to the phase correct or the phase and frequency correct, PWM mode. Note: 1. A special case occurs when OCR1A/OCR1B equals TOP and COM1A1/COM1B1 is set. See ”Phase Correct PWM Mode” on page 122. for more details. • Bit 1:0 – WGM11:0: Waveform Generation Mode Combined with the WGM13:2 bits found in the TCCR1B 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 15-4. 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 ”Modes of Operation” on page 118.). Table 15-3. Compare Output Mode, Phase Correct and Phase and Frequency Correct PWM(1) COM1A1/COM1B1 COM1A0/COM1B0 Description 0 0 Normal port operation, OC1A/OC1B disconnected. 01 WGM13:0 = 9 or 11: Toggle OC1A on Compare Match, OC1B disconnected (normal port operation). For all other WGM1 settings, normal port operation, OC1A/OC1B disconnected. 10 Clear OC1A/OC1B on Compare Match when up- counting. Set OC1A/OC1B on Compare Match when down counting. 11 Set OC1A/OC1B on Compare Match when up- counting. Clear OC1A/OC1B on Compare Match when down counting. |
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