Renesas R8C series, Hardware Manual

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A - 2
4. Special Function Registers (SFRs) 18
5. Resets 22
5.1 Hardware Reset ........................................................................................24
5.1.1 When Power Supply is Stable ............................................................24
5.1.2 Power On............................................................................................24
5.2 Power-On Reset Function .........................................................................26
5.3 Voltage Monitor 1 Reset ...........................................................................27
5.4 Voltage Monitor 2 Reset............................................................................27
5.5 Watchdog Timer Reset..............................................................................27
5.6 Software Reset..........................................................................................27
6. Programmable I/O Ports 28
6.1 Functions of Programmable I/O Ports .......................................................28
6.2 Effect on Peripheral Functions ..................................................................28
6.3 Pins Other than Programmable I/O Ports..................................................28
6.4 Port settings ..............................................................................................35
6.5 Unassigned Pin Handling ..........................................................................39
7. Voltage Detection Circuit 40
7.1 VCC Input Voltage.....................................................................................46
7.1.1 Monitoring Vdet1 ................................................................................46
7.1.2 Monitoring Vdet2 ................................................................................46
7.1.3 Digital Filter.........................................................................................46
7.2 Voltage Monitor 1 Reset............................................................................48
7.3 Voltage Monitor 2 Interrupt and Voltage Monitor 2 Reset .........................49
8. Processor Mode 51
8.1 Processor Modes ......................................................................................51
9. Bus 52
10. Clock Generation Circuit 53
10.1 Main Clock.................................................................................................60
10.2 On-Chip Oscillator Clocks .........................................................................61
10.2.1 Low-Speed On-Chip Oscillator Clock .................................................61
10.2.2 High-Speed On-Chip Oscillator Clock ................................................61