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H8/3003 Datasheet(PDF) 353 Page - Renesas Technology Corp |
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H8/3003 Datasheet(HTML) 353 Page - Renesas Technology Corp |
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353 / 715 page  Sample Setup Procedure for PWM Mode: Figure 10-28 shows a sample procedure for setting up PWM mode. Figure 10-28 Setup Procedure for PWM Mode (Example) PWM mode 1. Set bits TPSC2 to TPSC0 in TCR to select the counter clock source. If an external clock source is selected, set bits CKEG1 and CKEG0 in TCR to select the desired edge(s) of the external clock signal. PWM mode Select counter clock 1 Select counter clear source 2 Set GRA 3 Set GRB 4 Select PWM mode 5 Start counter 6 2. Set bits CCLR1 and CCLR0 in TCR to select the counter clear source. 3. Set the time at which the PWM waveform should go to 1 in GRA. 4. Set the time at which the PWM waveform should go to 0 in GRB. 5. Set the PWM bit in TMDR to select PWM mode. When PWM mode is selected, regardless of the TIOR contents, GRA and GRB become output compare registers specifying the times at which the PWM goes to 1 and 0. The TIOCA pin automatically becomes the PWM output pin. The TIOCB pin conforms to the settings of bits IOB1 and IOB0 in TIOR. If TIOCB output is not desired, clear both IOB1 and IOB0 to 0. 6. Set the STR bit to 1 in TSTR to start the timer counter. 335 |
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