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R8C2H Datasheet(PDF) 91 Page - Renesas Technology Corp |
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R8C2H Datasheet(HTML) 91 Page - Renesas Technology Corp |
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91 / 367 page  R8C/2H Group, R8C/2J Group 7. Comparator Rev.1.00 Mar 28, 2008 Page 71 of 341 REJ09B0388-0100 Figure 7.17 Example of Adjusting Internal Reference Voltage (Vref) (Voltage Detection 2 Used for Determining Supply Voltage) Start adjusting the internal reference voltage (Vref) Wait for 10 µs Adjustment of the internal reference voltage (Vref) completed No Yes Transfer the value of the BGRTRMA register to the BGRTRM register Wait for 10 µs Enable the voltage detection 2 circuit (Set the VCA27 bit to 1 and the VW2C0 bit to 0) Wait for td(E-A) or 100 µs Transfer the value of the BGRTRMB register to the BGRTRM register VCA13: Bit in VCA1 register VCA27: Bit in VCA2 register VW2C0: Bit in VW2C register VCA13 bit = 0 ? |
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