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SH7021 Datasheet(PDF) 291 Page - Renesas Technology Corp |
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SH7021 Datasheet(HTML) 291 Page - Renesas Technology Corp |
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291 / 509 page  RENESAS 275 Input capture signal BR GR TCNT Figure 10.46 Input Capture Buffer Operation Complementary PWM Mode: When the count direction of TCNT3 and TCNT4 change, the BR value is transferred to the GR. The following timing is employed for this transfer: • Whenever TCNT3 and GRA3 compare-match • Whenever TCNT4 underflows Reset-Synchronized PWM Mode: The BR value is transferred to GR upon a GRA3 compare match. Procedure for Selecting the Buffer Mode (figure 10.47): 1. Set the TIOR to select the output compare or input capture function of the GR. 2. Set bits BFA3, BFB3 and BFB4 in the TFCR to select the buffer mode for the GR. 3. Set the STR bit in the TSTR to 1 to start the TCNT counting. (1) (2) (3) Select general register function Buffer mode Select buffer mode Start counting Buffer mode Figure 10.47 Procedure for Selecting the Buffer Mode |
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