M16C26A Datasheet, PDF (9/352 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

5. Reset ________________________________________ 26
5.1 Hardware Reset .......................................................................................................... 26
5.1.1 Hardware Reset 1 ................................................................................................ 26
5.1.2 Hardware Reset 2 ................................................................................................ 26
5.2 Software Reset ............................................................................................................ 27
5.3 Watchdog Timer Reset ................................................................................................ 27
5.4 Oscillation Stop Detection Reset ................................................................................. 27
5.5 Voltage Detection Circuit ............................................................................................. 29
5.5.1 Voltage Down Detection Interrupt ....................................................................... 32
5.5.2 Limitations on Exiting Stop Mode ........................................................................ 34
5.5.3 Limitations on Exiting Wait Mode ........................................................................ 34
6. Processor Mode _______________________________ 35
7. Clock Generation Circuit _________________________ 38
7.1 Main Clock .................................................................................................................. 45
7.2 Sub Clock .................................................................................................................... 46
7.3 On-chip Oscillator Clock .............................................................................................. 47
7.4 PLL Clock .................................................................................................................... 47
7.5 CPU Clock and Peripheral Function Clock ................................................................. 49
7.5.1 CPU Clock ........................................................................................................... 49
7.5.2 Peripheral Function Clock (f1, f2, f8, f32, f1SIO, f2SIO, f8SIO, f32SIO, fAD, fC32) ....... 49
7.5.3 ClockOutput Function .......................................................................................... 49
7.6 Power Control ............................................................................................................. 50
7.6.1 Normal Operation Mode ....................................................................................... 50
7.6.2 Wait Mode ............................................................................................................ 51
7.6.3 Stop Mode ........................................................................................................... 53
7.7 System Clock Protective Function .............................................................................. 57
7.8 Oscillation Stop and Re-oscillation Detect Function ................................................... 57
7.8.1 Operation When the CM27 bit is set to "0" (Oscillation Stop Detection Reset) ... 58
7.8.2 Operation When the CM27 bit is set to "1"
(Oscillation Stop and Re-oscillation Detect Interrupt) .................. 58
7.8.3 How to Use Oscillation Stop and Re-oscillation Detect Function ......................... 59
8. Protection ____________________________________ 60
9. Interrupt ______________________________________ 61
9.1 Type of Interrupts ........................................................................................................ 61
9.1.1 Software Interrupts ............................................................................................... 62
9.1.2 Hardware Interrupts ............................................................................................. 63
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