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R8C2K Datasheet(PDF) 366 Page - Renesas Technology Corp |
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R8C2K Datasheet(HTML) 366 Page - Renesas Technology Corp |
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366 / 471 page  R8C/2K Group, R8C/2L Group 19. A/D Converter Rev.1.10 Dec 21, 2007 Page 349 of 450 REJ09B0406-0110 Figure 19.1 Block Diagram of A/D Converter Comparator AVSS Data bus Resistor ladder VCUT = 0 VCUT = 1 VREF Successive conversion register AD register ADCON0 Vcom VIN P1_0/AN8 P1_1/AN9 P1_2/AN10 P1_3/AN11 ADGSEL0 = 1 CH0 to CH2, ADGSEL0, ADCAP, CKS0: Bits in ADCON0 register CKS1, VCUT: Bits in ADCON1 register ADGSEL0 = 0 P0_5/AN2 CH2 to CH0 = 010b P0_3/AN4 P0_2/AN5 P0_1/AN6 P0_0/AN7 Decoder CKS0 = 1 CKS1 = 1 CKS1 = 0 φAD A/D conversion rate selection CKS0 = 0 f2 f4 fOCO-F f1 CKS0 = 1 CKS0 = 0 CH2 to CH0 = 100b CH2 to CH0 = 101b CH2 to CH0 = 110b CH2 to CH0 = 111b CH2 to CH0 = 100b CH2 to CH0 = 101b CH2 to CH0 = 110b CH2 to CH0 = 111b ADCAP = 1 Software trigger Timer RD interrupt request ADCAP = 0 Trigger |
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