M16C28 Datasheet, PDF (9/423 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

5. Reset ..............................................................................................................32
5.1 Hardware Reset .............................................................................................................. 32
5.1.1 Hardware Reset 1 .................................................................................................... 32
5.1.2 Hardware Reset 2 .................................................................................................... 32
5.2 Software Reset ............................................................................................................... 33
5.3 Watchdog Timer Reset ................................................................................................... 33
5.4 Oscillation Stop Detection Reset .................................................................................... 33
5.5 Voltage Detection Circuit ................................................................................................ 35
5.5.1 Low Voltage Detection Interrupt ............................................................................... 38
5.5.2 Limitations on Stop Mode ......................................................................................... 40
5.5.3 Limitations on WAIT Instruction ................................................................................ 40
6. Processor Mode .............................................................................................41
7. Clock Generation Circuit ................................................................................44
7.1 Main Clock ...................................................................................................................... 51
7.2 Sub Clock ....................................................................................................................... 52
7.3 On-chip Oscillator Clock ................................................................................................. 53
7.4 PLL Clock ....................................................................................................................... 53
7.5 CPU Clock and Peripheral Function Clock ..................................................................... 55
7.5.1 CPU Clock ................................................................................................................ 55
7.5.2 Peripheral Function Clock(f1, f2, f8, f32, f1SIO, f2SIO, f8SIO, f32SIO, fAD, fC32) ........... 55
7.6 Power Control ................................................................................................................. 56
7.6.1 Normal Operation Mode ........................................................................................... 56
7.6.2 Wait Mode ................................................................................................................ 57
7.6.3 Stop Mode ............................................................................................................... 59
7.7 System Clock Protective Function .................................................................................. 63
7.8 Oscillation Stop and Re-oscillation Detect Function ....................................................... 63
7.8.1 Operation when CM27 bit is set to "0" (Oscillation Stop Detection Reset) .............. 64
7.8.2 Operation when CM27 bit is set to "1" (Oscillation Stop and Re-oscillation Detect Interrupt) .... 64
7.8.3 How to Use Oscillation Stop and Re-oscillation Detect Function ............................. 65
8. Protection .......................................................................................................66
9. Interrupts ........................................................................................................67
9.1 Type of Interrupts ............................................................................................................ 67
9.1.1 Software Interrupts ................................................................................................... 68
9.1.2 Hardware Interrupts ................................................................................................. 69
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