M16C65 Datasheet, PDF (11/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

8.4 CPU Clock and Peripheral Function Clocks.................................................... 119
8.4.1 CPU Clock and BCLK............................................................................... 119
8.4.2 Peripheral Function Clocks (f1, fOCO40M, fOCO-F, fOCO-S, fC32, fC).. 119
8.5 Clock Output Function..................................................................................... 121
8.6 System Clock Protection Function .................................................................. 121
8.7 Oscillation Stop/Re-Oscillation Detect Function .............................................. 122
8.7.1 Operation When CM27 Bit is 0 (Oscillation Stop Detection Reset) .......... 122
8.7.2 Operation When CM27 Bit is 1 (Oscillation Stop, Re-Oscillation Detect
Interrupt) ................................................................................................... 123
8.7.3 Using the Oscillation Stop, Re-Oscillation Detect Function ...................... 124
8.8 Notes on Clock Generator............................................................................... 125
8.8.1 Oscillation Circuit Using an Oscillator....................................................... 125
8.8.2 Noise Countermeasure............................................................................. 126
8.8.3 CPU ClockW............................................................................................. 127
8.8.4 Oscillation Stop, Re-Oscillation Detect Function ...................................... 127
8.8.5 PLL Frequency Synthesizer ..................................................................... 128
9. Power Control....................................................................................... 129
9.1 Introduction...................................................................................................... 129
9.2 Registers ......................................................................................................... 129
9.2.1 Flash Memory Control Register 0 (FMR0)................................................ 130
9.2.2 Flash Memory Control Register 2 (FMR2)................................................ 131
9.3 Clock ............................................................................................................... 132
9.3.1 Normal Operating Mode ........................................................................... 132
9.3.2 Mode Transitions ...................................................................................... 136
9.3.3 Wait Mode ................................................................................................ 139
9.3.4 Stop Mode ................................................................................................ 143
9.4 Power Control in Flash Memory ...................................................................... 146
9.4.1 Stopping Flash Memory............................................................................ 146
9.4.2 Reading Flash Memory ............................................................................ 147
9.5 Reducing Power Consumption........................................................................ 149
9.5.1 Ports ......................................................................................................... 149
9.5.2 A/D Converter........................................................................................... 149
9.5.3 D/A Converter........................................................................................... 149
9.5.4 Stopping Peripheral Functions.................................................................. 149
9.5.5 Switching the Oscillation-Driving Capacity ............................................... 149
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