
Preliminary User’s Manual U16541EJ1V0UM
17
22.6
Interrupt Acknowledge Time of CPU ................................................................................... 773
22.7
Periods in Which Interrupts Are Not Acknowledged by CPU ........................................... 774
CHAPTER 23 KEY INTERRUPT FUNCTION....................................................................................... 775
23.1
Function ................................................................................................................................. 775
23.2
Control Register .................................................................................................................... 776
CHAPTER 24 STANDBY FUNCTION ................................................................................................... 777
24.1
Overview................................................................................................................................. 777
24.2
HALT Mode............................................................................................................................. 780
24.2.1
Setting and operation status.................................................................................................... 780
24.2.2
Releasing HALT mode ............................................................................................................ 780
24.3
IDLE1 Mode ............................................................................................................................ 782
24.3.1
Setting and operation status.................................................................................................... 782
24.3.2
Releasing IDLE1 mode ........................................................................................................... 782
24.4
IDLE2 Mode ............................................................................................................................ 784
24.4.1
Setting and operation status.................................................................................................... 784
24.4.2
Releasing IDLE2 mode ........................................................................................................... 784
24.4.3
Securing setup time when releasing IDLE2 mode .................................................................. 786
24.5
Software STOP Mode ............................................................................................................ 787
24.5.1
Setting and operation status.................................................................................................... 787
24.5.2
Releasing software STOP mode ............................................................................................. 787
24.5.3
Securing oscillation stabilization time when releasing software STOP mode ......................... 789
24.7
Subclock Operation Mode .................................................................................................... 790
24.7.1
24.7.2
Releasing subclock operation mode ....................................................................................... 790
24.8
Sub-IDLE Mode ...................................................................................................................... 792
24.8.1
Setting and operation status.................................................................................................... 792
24.8.2
Releasing sub-IDLE mode ...................................................................................................... 792
24.9
Control Registers .................................................................................................................. 794
CHAPTER 25 RESET FUNCTIONS ...................................................................................................... 795
25.1
Overview................................................................................................................................. 795
25.2
Registers to Check Reset Source ........................................................................................ 795
25.3
Operation................................................................................................................................ 796
25.3.1
Reset operation via RESET pin............................................................................................... 796
25.3.2
Reset operation by WDT2RES signal ..................................................................................... 798
25.3.3
Reset operation by low-voltage detector ................................................................................. 800
25.3.4
Clock monitor .......................................................................................................................... 804
CHAPTER 26 REGULATOR .................................................................................................................. 807
26.1
Outline .................................................................................................................................... 807
26.2
Operation................................................................................................................................ 808