Index-10
15.3.3 Priority specification flag registers (PR00L, PR00H, PR01L, PR10L, PR10H, PR11L) ................ 581
15.3.4 External interrupt rising edge enable register (EGP0),
external interrupt falling edge enable register (EGN0) ................................................................. 582
15.3.5 Program status word (PSW) ......................................................................................................... 583
15.4 Interrupt Servicing Operations ............................................................................................... 584
15.4.1 Maskable interrupt request acknowledgment ............................................................................... 584
15.4.2 Software interrupt request acknowledgment ................................................................................ 587
15.4.3 Multiple interrupt servicing ............................................................................................................ 587
15.4.4 Interrupt request hold ................................................................................................................... 591
CHAPTER 16 STANDBY FUNCTION .................................................................................................. 592
16.1 Standby Function ..................................................................................................................... 592
16.2 Registers Controlling Standby Function ............................................................................... 593
16.2.1
Oscillation stabilization time counter status register (OSTC) ....................................................... 594
16.2.2
Oscillation stabilization time select register (OSTS) .................................................................... 595
16.3 Standby Function Operation ................................................................................................... 596
16.3.1 HALT mode .................................................................................................................................. 596
16.3.2 STOP mode .................................................................................................................................. 600
16.3.3 SNOOZE mode ............................................................................................................................ 605
CHAPTER 17 RESET FUNCTION ........................................................................................................ 608
17.1 Timing of Reset Operation ...................................................................................................... 610
17.2 Register for Confirming Reset Source ................................................................................... 616
17.2.1 Reset control flag register (RESF) ................................................................................................ 616
CHAPTER 18 POWER-ON-RESET CIRCUIT ...................................................................................... 619
18.1 Functions of Power-on-reset Circuit ...................................................................................... 619
18.2 Configuration of Power-on-reset Circuit ................................................................................ 620
18.3 Operation of Power-on-reset Circuit ...................................................................................... 620
18.4 Cautions for Power-on-reset Circuit ....................................................................................... 624
CHAPTER 19 VOLTAGE DETECTOR ................................................................................................. 626
19.1 Functions of Voltage Detector ................................................................................................ 626
19.2 Configuration of Voltage Detector .......................................................................................... 627
19.3 Registers Controlling Voltage Detector ................................................................................. 627
19.3.1 Voltage detection register (LVIM) ................................................................................................. 628
19.3.2 Voltage detection level register (LVIS) ......................................................................................... 629
19.4 Operation of Voltage Detector ................................................................................................ 631
19.4.1 When used as reset mode ............................................................................................................ 631
19.4.2 When used as interrupt mode ...................................................................................................... 633