r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 10

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

8.
9.
8.1
8.2
8.3
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
8.2.1
8.2.2
8.2.3
8.2.4
8.2.5
8.2.6
8.2.7
8.3.1
8.3.2
8.3.3
9.2.1
9.2.2
9.2.3
9.2.4
9.2.5
9.2.6
9.2.7
9.2.8
9.2.9
9.2.10
9.4.1
9.4.2
9.6.1
9.6.2
9.6.3
9.6.4
9.6.5
9.6.6
9.6.7
9.6.8
9.6.9
9.6.10
9.7.1
9.8.1
9.8.2
Watchdog Timer .................................................................................................................................. 71
Clock Generation Circuit ..................................................................................................................... 81
Overview ........................................................................................................................................................ 71
Registers ......................................................................................................................................................... 73
Operations ...................................................................................................................................................... 78
Overview ........................................................................................................................................................ 81
Registers ......................................................................................................................................................... 84
XIN Clock ...................................................................................................................................................... 94
On-Chip Oscillator Clocks ............................................................................................................................. 95
XCIN Clock ................................................................................................................................................... 96
CPU Clock and Peripheral Functional Clock ................................................................................................. 97
Oscillation Stop Detection Function .............................................................................................................. 99
Notes on Clock Generation Circuit .............................................................................................................. 102
Reset Interrupt Select Register (RISR) ...................................................................................................... 74
Watchdog Timer Reset Register (WDTR) ................................................................................................. 74
Watchdog Timer Start Register (WDTS) ................................................................................................... 75
Watchdog Timer Control Register (WDTC) .............................................................................................. 75
Count Source Protection Mode Register (CSPR) ...................................................................................... 75
Option Function Select Register 2 (OFS2) ................................................................................................ 76
Option Function Select Register (OFS) ..................................................................................................... 77
Items Common to Multiple Modes ............................................................................................................ 78
When Count Source Protection Mode is Disabled .................................................................................... 79
When Count Source Protection Mode is Enabled ..................................................................................... 80
System Clock Control Register 0 (CM0) .................................................................................................. 85
System Clock Control Register 1 (CM1) .................................................................................................. 86
Oscillation Stop Detection Register (OCD) .............................................................................................. 87
System Clock Control Register 3 (CM3) .................................................................................................. 88
System Clock Control Register 4 (CM4) .................................................................................................. 89
Clock Prescaler Reset Flag (CPSRF) ........................................................................................................ 90
High-Speed On-Chip Oscillator Control Register 0 (FRA0) .................................................................... 90
High-Speed On-Chip Oscillator Control Register 2 (FRA2) .................................................................... 91
Voltage Detection Register 2 (VCA2) ....................................................................................................... 92
I/O Function Pin Select Register (PINSR) ................................................................................................ 93
Low-Speed On-Chip Oscillator Clock ...................................................................................................... 95
High-Speed On-Chip Oscillator Clock ...................................................................................................... 95
System Clock ............................................................................................................................................. 97
CPU Clock ................................................................................................................................................. 97
Peripheral Function Clocks (f1, f2, f4, f8, and f32) .................................................................................. 97
fOCO ......................................................................................................................................................... 97
fHOCO ....................................................................................................................................................... 97
fHOCO-F ................................................................................................................................................... 97
fLOCO ....................................................................................................................................................... 97
fOCO128 ................................................................................................................................................... 98
fC1, fC2, and fC32 .................................................................................................................................... 98
fLOCOWDT .............................................................................................................................................. 98
How to Use Oscillation Stop Detection Function ...................................................................................... 99
Oscillation Stop Detection Function ........................................................................................................ 102
Oscillation Circuit Constants ................................................................................................................... 102
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