
User’s Manual U17854EJ8V0UD
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16.2 Configuration of Key Interrupt ................................................................................................ 586
16.3 Register Controlling Key Interrupt ......................................................................................... 587
CHAPTER 17 STANDBY FUNCTION .................................................................................................. 588
17.1 Standby Function and Configuration ..................................................................................... 588
17.1.1 Standby function ...........................................................................................................................588
17.1.2 Registers controlling standby function...........................................................................................588
17.2 Standby Function Operation ................................................................................................... 591
17.2.1 HALT mode ...................................................................................................................................591
17.2.2 STOP mode ..................................................................................................................................596
CHAPTER 18 RESET FUNCTION........................................................................................................ 603
18.1 Register for Confirming Reset Source ................................................................................... 611
CHAPTER 19 POWER-ON-CLEAR CIRCUIT...................................................................................... 612
19.1 Functions of Power-on-Clear Circuit...................................................................................... 612
19.2 Configuration of Power-on-Clear Circuit ............................................................................... 613
19.3 Operation of Power-on-Clear Circuit ...................................................................................... 613
19.4 Cautions for Power-on-Clear Circuit ...................................................................................... 616
CHAPTER 20 LOW-VOLTAGE DETECTOR ....................................................................................... 618
20.1 Functions of Low-Voltage Detector........................................................................................ 618
20.2 Configuration of Low-Voltage Detector ................................................................................. 619
20.3 Registers Controlling Low-Voltage Detector......................................................................... 619
20.4 Operation of Low-Voltage Detector ........................................................................................ 624
20.4.1 When used as reset ......................................................................................................................625
20.4.2 When used as interrupt .................................................................................................................631
20.5 Cautions for Low-Voltage Detector ........................................................................................ 637
CHAPTER 21 REGULATOR ................................................................................................................. 641
21.1 Regulator Overview.................................................................................................................. 641
21.2 Registers Controlling Regulator ............................................................................................. 641
CHAPTER 22 OPTION BYTE............................................................................................................... 643
22.1 Functions of Option Bytes ...................................................................................................... 643
22.1.1 User option byte (000C0H to 000C2H/010C0H to 010C2H) .........................................................643
22.1.2 On-chip debug option byte (000C3H/ 010C3H).............................................................................644
22.2 Format of User Option Byte .................................................................................................... 644
22.3 Format of On-chip Debug Option Byte................................................................................... 646
22.4 Setting of Option Byte ............................................................................................................. 647
CHAPTER 23 FLASH MEMORY .......................................................................................................... 648
23.1 Writing with Flash Memory Programmer ............................................................................... 648
23.2 Programming Environment ..................................................................................................... 651
23.3 Communication Mode .............................................................................................................. 651