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R8C/2G 数据表(PDF) 72 Page - Renesas Technology Corp |
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R8C/2G 数据表(HTML) 72 Page - Renesas Technology Corp |
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72 / 344 page  R8C/2G Group 7. Comparator Rev.1.00 Apr 04, 2008 Page 52 of 318 REJ09B0387-0100 Figure 7.6 VCAB Register Figure 7.7 ALCMR Register Voltage Detection Circuit External Input Control Register(1) Symbol Address After Reset VCAB 003Bh 00h Bit Symbol Bit Name Function RW NOTE: 1. — (b4-b0) Reserved bits Set to 0. RW b0 0 0: Supply voltage (VCC) 1: VCMP1 pin input voltage b3 b2 0 b1 0 0 VCAB5 b7 b6 b5 b4 0 VCMP1 comparison voltage external input select bit RW RW 0: Internal reference voltage 1: CVREF pin input voltage RW Set the PRC3 bit in the PRCR register to 1 (w rite enabled) before rew riting the VCAB register. Comparator circuit reference voltage select bit VCAB6 VCMP2 comparison voltage external input select bit 0: Supply voltage (VCC) 1: VCMP2 pin input voltage VCAB7 Comparator Mode Register Symbol Address After Reset ALCMR 003Ch 00h Bit Symbol Bit Name Function RW b3 b2 LCM2POR b0 LCM1POR b1 b7 b6 b5 b4 VCOUT2 output polarity select bit RW VCOUT1 output polarity select bit 0: Non-inverted comparator 1 comparison result is output to VCOUT1 1: Inverted comparator 1 comparison result is output to VCOUT1 RW 0: Non-inverted comparator 2 comparison result is output to VCOUT2 1: Inverted comparator 2 comparison result is output to VCOUT2 0: Non-maskable interrupt 1: Maskable interrupt Comparator 1 interrupt type select bit VCOUT2 output enable bit 0: Output disabled 1: Output enabled Nothing is assigned. If necessary, set to 0. When read, the content is 0. — (b7-b6) — RW IRQ1SEL CM1OE VCOUT1 output enable bit 0: Output disabled 1: Output enabled RW CM2OE RW IRQ2SEL Comparator 2 interrupt type select bit 0: Non-maskable interrupt 1: Maskable interrupt RW |
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