M16C65 Datasheet, PDF (9/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

4. Special Function Registers (SFRs) ........................................................ 38
4.1 SFRs ................................................................................................................. 38
4.2 Notes on SFRs .................................................................................................. 54
4.2.1 Register Settings ........................................................................................ 54
5. Protection ............................................................................................... 55
5.1 Introduction........................................................................................................ 55
5.2 Register ............................................................................................................. 55
5.2.1 Protect Register (PRCR) ............................................................................ 55
5.3 Notes on Protection........................................................................................... 57
6. Resets .................................................................................................... 58
6.1 Introduction........................................................................................................ 58
6.2 Registers ........................................................................................................... 59
6.2.1 Processor Mode Register 0 (PM0) ............................................................. 60
6.2.2 Reset Source Determine Register (RSTFR) .............................................. 61
6.3 Optional Function Select Area........................................................................... 63
6.3.1 Optional Function Select Address 1 (OFS1) .............................................. 63
6.4 Operations......................................................................................................... 65
6.4.1 Status After Reset....................................................................................... 65
6.4.2 Hardware Reset.......................................................................................... 68
6.4.3 Power-On Reset Function .......................................................................... 69
6.4.4 Voltage Monitor 0 Reset ............................................................................. 70
6.4.5 Voltage Monitor 1 Reset ............................................................................. 70
6.4.6 Voltage Monitor 2 Reset ............................................................................. 71
6.4.7 Oscillation Stop Detection Reset ................................................................ 71
6.4.8 Watchdog Timer Reset ............................................................................... 72
6.4.9 Software Reset ........................................................................................... 72
6.4.10 Cold Start-Up/Warm Start-Up Discrimination.............................................. 73
6.5 Notes on Resets................................................................................................ 74
6.5.1 Power Supply Rising Gradient.................................................................... 74
6.5.2 Power-On Reset ......................................................................................... 74
6.5.3 OSDR Bit (Oscillation Stop Detection Reset Detection Flag) ..................... 74
7. Voltage Detector..................................................................................... 75
7.1 Introduction........................................................................................................ 75
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