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M16C/62 데이터시트(PDF) 451 Page - Renesas Technology Corp |
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M16C/62 데이터시트(HTML) 451 Page - Renesas Technology Corp |
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451 / 615 page ![]() A-D Converter Mitsubishi microcomputers M16C / 62A Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER 2-134 Figure 2.7.23. Theoretical A-D conversion characteristics (10-bit mode) Table 2.7.11. Variation of the successive comparison register and Vref while A-D conversion is in progress (10-bit mode) 00016 00116 00216 00316 3FE16 3FF16 Result of A-D conversion Analog input voltage VREF 1024 x 1 VREF 1024 x 2 VREF 1024 x 3 x 1021 VREF 1024 VREF 1024 x 1022 VREF 1024 x 1023 VREF VREF 1024 x 0.5 Theoretical A-D conversion characteristic Ideal A-D conversion characteristic 0 1 1 n9 0 0 0000 000 0 0 0000 000 1 0 0000 000 n9 n8 10000 000 n9 n8 n7 n6 n5 n4 n3 n2 n1 0 n9 n8 n7 n6 n5 n4 n3 n2 n1 n0 b9 b0 1st comparison result 2nd comparison result Successive approximation register Vref change A-D converter stopped 1st comparison 2nd comparison 3rd comparison 10th comparison Conversion complete VREF ± ± 2 VREF 4 VREF 8 VREF ± ...... ± VREF 1024 – 2048 VREF [V] 2 [V] – 2 VREF 2048 VREF [V] ± ± 2 VREF 4 VREF 8 VREF – 2048 VREF [V] 4 n9 = 1 + n9 = 0 – n8 = 1 + 8 VREF n8 = 0 – ± 2 VREF 4 VREF – 2048 VREF [V] 4 VREF VREF 8 VREF This data transfers to the bit 0 to bit 9 of A-D register i. |
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