M16C65 Datasheet, PDF (10/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

7.2 Registers ........................................................................................................... 77
7.2.1 Voltage Detection 2 Circuit Flag Register (VCR1)...................................... 78
7.2.2 Voltage Detection Circuit Operation Enable Register (VCR2).................... 79
7.2.3 Voltage Monitor Function Select Register (VWCE) .................................... 80
7.2.4 Voltage Detection 1 Level Select Register (VD1LS)................................... 80
7.2.5 Voltage Monitor 0 Circuit Control Register (VW0C).................................... 82
7.2.6 Voltage Monitor 1 Circuit Control Register (VW1C).................................... 83
7.2.7 Voltage Monitor 2 Circuit Control Register (VW2C).................................... 85
7.3 Optional Function Select Area........................................................................... 87
7.3.1 Optional Function Select Address (OFS1) ................................................. 87
7.4 Operations......................................................................................................... 88
7.4.1 Digital Filter................................................................................................. 88
7.4.2 Voltage Detection 0 Circuit ......................................................................... 89
7.4.3 Voltage Detection 1 Circuit ......................................................................... 91
7.4.4 Voltage Detection 2 Circuit ......................................................................... 94
7.5 Interrupts ........................................................................................................... 97
8. Clock Generator ..................................................................................... 98
8.1 Introduction........................................................................................................ 98
8.2 Registers ......................................................................................................... 101
8.2.1 Processor Mode Register 0 (PM0) ........................................................... 102
8.2.2 System Clock Control Register 0 (CM0)................................................... 103
8.2.3 System Clock Control Register 1 (CM1)................................................... 105
8.2.4 Oscillation Stop Detection Register (CM2) ............................................... 107
8.2.5 Peripheral Clock Select Register (PCLKR) .............................................. 109
8.2.6 PLL Control Register 0 (PLC0)................................................................. 110
8.2.7 Processor Mode Register 2 (PM2) ............................................................111
8.2.8 40 MHz On-Chip Oscillator Control Register 0 (FRA0) ............................ 112
8.3 Clocks Generated by Clock Generators.......................................................... 113
8.3.1 Main Clock................................................................................................ 113
8.3.2 PLL Clock ................................................................................................. 115
8.3.3 fOCO40M ................................................................................................. 116
8.3.4 fOCO-F ..................................................................................................... 116
8.3.5 125 kHz On-Chip Oscillator Clock (fOCO-S)............................................ 117
8.3.6 Sub Clock (fC) .......................................................................................... 118
A-3