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15.4.2 Software interrupt request acknowledgment .................................................................................593
15.4.3 Multiple interrupt servicing.............................................................................................................594
15.4.4 Interrupt request hold ....................................................................................................................597
CHAPTER 16 KEY INTERRUPT FUNCTION ..................................................................................... 598
16.1 Functions of Key Interrupt ...................................................................................................... 598
16.2 Configuration of Key Interrupt ................................................................................................ 598
16.3 Register Controlling Key Interrupt ......................................................................................... 599
CHAPTER 17 STANDBY FUNCTION .................................................................................................. 600
17.1 Standby Function and Configuration ..................................................................................... 600
17.1.1 Standby function ...........................................................................................................................600
17.1.2 Registers controlling standby function...........................................................................................600
17.2 Standby Function Operation ................................................................................................... 603
17.2.1 HALT mode ...................................................................................................................................603
17.2.2 STOP mode ..................................................................................................................................608
CHAPTER 18 RESET FUNCTION........................................................................................................ 615
18.1 Register for Confirming Reset Source ................................................................................... 623
CHAPTER 19 POWER-ON-CLEAR CIRCUIT...................................................................................... 624
19.1 Functions of Power-on-Clear Circuit...................................................................................... 624
19.2 Configuration of Power-on-Clear Circuit ............................................................................... 625
19.3 Operation of Power-on-Clear Circuit ...................................................................................... 625
19.4 Cautions for Power-on-Clear Circuit ...................................................................................... 628
CHAPTER 20 LOW-VOLTAGE DETECTOR ....................................................................................... 630
20.1 Functions of Low-Voltage Detector........................................................................................ 630
20.2 Configuration of Low-Voltage Detector ................................................................................. 631
20.3 Registers Controlling Low-Voltage Detector......................................................................... 631
20.4 Operation of Low-Voltage Detector ........................................................................................ 636
20.4.1 When used as reset ......................................................................................................................637
20.4.2 When used as interrupt .................................................................................................................643
20.5 Cautions for Low-Voltage Detector ........................................................................................ 649
CHAPTER 21 REGULATOR ................................................................................................................. 653
21.1 Regulator Overview.................................................................................................................. 653
21.2 Registers Controlling Regulator ............................................................................................. 653
CHAPTER 22 OPTION BYTE............................................................................................................... 655
22.1 Functions of Option Bytes ...................................................................................................... 655
22.1.1 User option byte (000C0H to 000C2H/010C0H to 010C2H) .........................................................655
22.1.2 On-chip debug option byte (000C3H/ 010C3H).............................................................................656
22.2 Format of User Option Byte .................................................................................................... 656
22.3 Format of On-chip Debug Option Byte................................................................................... 658
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User's Manual U17854EJ9V0UD
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