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M32C/86 데이터시트(PDF) 351 Page - Renesas Technology Corp |
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M32C/86 데이터시트(HTML) 351 Page - Renesas Technology Corp |
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351 / 505 page ![]() Page 328 9 7 4 f o 5 0 0 2 , 8 0 . p e S 0 0 . 1 . v e R 0 0 1 0 - 4 0 2 0 B 9 0 J E R 23. CAN Module ) T 6 8 / C 2 3 M , 6 8 / C 2 3 M ( p u o r G 6 8 / C 2 3 M 23.1.6.1 SAM Bit The SAM bit determines the number of sample points to be taken per bit. When the SAM bit is set to "0", only one sample is taken per bit at the end of the Phase Buffer Segment 1 (PBS1) to determine the value of the bit. When the SAM bit is set to "1", three samples per bit are taken; one time quantum and two time quanta before the end of PBS1, and at the end of PBS1. The sample result value which is detected more than twice becomes the value of the bit sampled. 23.1.6.2 PTS2 to PTS0 Bits The PTS2 to PTS0 bits determine PTS width. 23.1.6.3 PBS12 to PBS10 Bits The PBS12 to PBS10 bits determine PBS1 width. Set the PBS12 to 10 bits to "0012" or more. 23.1.6.4 PBS22 to PBS20 Bits The PBS22 to PBS20 bits determine PBS2 width. Set the PBS22 to PBS20 bits to "0012" or more. 23.1.6.5 SJW1 and SJW0 Bits The SJW1 and SJW0 bits determine SJW width. Set the SJW1 and SJW0 bits to values less than or equal to the PBS12 to PBS10 bit settings and the PBS22 to PBS20 bit settings. Table 23.3 Bit Timing when CPU Clock = 30 MHz Baud Rate BRP Tq Clock Cycles (ns) Tq Per Bit PTS+PBS1 PBS2 Sample Point 1Mbps 1 66.7 15 12 2 87% 1 66.7 15 11 3 80% 1 66.7 15 10 4 73% 2 100 10 7 2 80% 2 100 10 6 3 70% 2 100 10 5 4 60% 500Kbps 2 100 20 16 3 85% 2 100 20 15 4 80% 2 100 20 14 5 75% 3 133.3 15 12 2 87% 3 133.3 15 11 3 80% 3 133.3 15 10 4 73% 4 166.7 12 9 2 83% 4 166.7 12 8 3 75% 4 166.7 12 7 4 67% 5 200 10 7 2 80% 5 200 10 6 3 70% 5 200 10 5 4 60% |
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