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SH7041A bảng dữ liệu(PDF) 440 Page - Renesas Technology Corp |
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SH7041A bảng dữ liệu(HTML) 440 Page - Renesas Technology Corp |
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440 / 923 page ![]() 402 When setting the buffer operation in the reset synchronous PWM mode, it is not necessary to set the timer interrupt enable register’s (TIER4) TGIEC and TGIED bits to 0, to prohibit interrupt output. Figure 12.88 shows an example of operations for TGR3, TGR4, TIOC3, and TIOC4, with TMDR3’s BFA and BFB bits set to 1, and TMDR4’s BFA and BFB bits set to 0. TGR3A TGR3C TGR3B,TGR4A TGR4B TGR3D,TGR4C TGR4D H'0000 TIOC3A TIOC3B TIOC3D TIOC4A TIOC4C TIOC4B TIOC4D TGF3C TGF3D TGF4C TGF4D TCNT3 TGR3A, TGR3C TGR3B,TGR3D TGR4A,TGR4C TGR4B,TGR4D Not set Not set Not set Buffer transfer with compare match A3 Point a Point b Not set Figure 12.88 Buffer Operation and Compare-Match Flags in Reset Sync PWM Mode (for A Mask) 12.7.14 Overflow Flags in Reset Sync PWM Mode When set to reset sync PWM mode, TCNT3 and TCNT4 start counting when the CST3 bit of TSTR is set to 1. At this point, TCNT4’s count clock source and count edge obey the TCR3 setting. In reset sync PWM mode, with cycle register TGR3A’s set value at H'FFFF, take care when specifying TGR3A compare-match for the counter clear source, since the operation of the overflow flag (TCFV bit) differs with TSR3 and TSR4. |
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