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HD404848FS Datasheet(PDF) 94 Page - Renesas Technology Corp |
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HD404848FS Datasheet(HTML) 94 Page - Renesas Technology Corp |
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94 / 127 page  HD404849 Series 92 A/D Converter The MCU has a built-in A/D converter that uses successive approximations with a resistor ladder. It can measure eight analog inputs with 8-bit resolution. As shown in the block diagram of figure 77, the A/D converter has a 4-bit A/D mode register, a 4-bit plus 4-bit A/D data register, a 1-bit A/D start flag, and a 1- bit A/D current off flag. COMP + – AN1 3 Reference voltage Reference voltage control A/D control logic A/D start flag (ADSF) A/D current off flag (IAOF) Conversion time control HLT (1 in stop, watch, and subactive modes) A/D mode register (AMR) A/D data register (ADRU, ADRL) Interrupt flag (IFAD) Encoder AN0 AN2 AN3 R30/AN4 R31/AN5 R32/AN6 R33/AN7 AVCC AVSS D/A Figure 77 Block Diagram of A/D Converter |
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