User’s Manual U18279EJ3V0UD
17
20.9
Periods in Which CPU Does Not Acknowledge Interrupts ...............................................1024
20.10 Caution...................................................................................................................................1024
CHAPTER 21 STANDBY FUNCTION.................................................................................................1025
21.1
Overview ................................................................................................................................1025
21.2
Control Registers..................................................................................................................1027
21.3
HALT Mode ............................................................................................................................1029
21.3.1
Setting and operation status.................................................................................................... 1029
21.3.2
Releasing HALT mode ............................................................................................................ 1029
21.4
IDLE Mode..............................................................................................................................1031
21.4.1
Setting and operation status.................................................................................................... 1031
21.4.2
Releasing IDLE mode ............................................................................................................. 1031
21.5
STOP Mode ............................................................................................................................1033
21.5.1
Setting and operation status.................................................................................................... 1033
21.5.2
Releasing STOP mode............................................................................................................ 1033
21.6
Securing Oscillation Stabilization Time .............................................................................1035
CHAPTER 22 RESET FUNCTIONS....................................................................................................1036
22.1
Overview ................................................................................................................................1036
22.2
Control Register....................................................................................................................1036
22.3
Operation ...............................................................................................................................1038
CHAPTER 23 LOW-VOLTAGE DETECTOR ......................................................................................1041
23.1
Functions ...............................................................................................................................1041
23.2
Configuration ........................................................................................................................1041
23.3
Control Registers..................................................................................................................1042
23.4
Operation ...............................................................................................................................1044
23.4.1
To use for internal reset signal ................................................................................................ 1044
23.4.2
To use for interrupt .................................................................................................................. 1046
CHAPTER 24 POWER-ON CLEAR CIRCUIT ...................................................................................1047
24.1
Function .................................................................................................................................1047
24.2
Configuration ........................................................................................................................1047
24.3
Operation ...............................................................................................................................1048
CHAPTER 25 REGULATOR ................................................................................................................1049
25.1
Overview ................................................................................................................................1049
25.2
Operation ...............................................................................................................................1050
CHAPTER 26 ON-CHIP DEBUG FUNCTION....................................................................................1051
26.1
Debugging Using DCU .........................................................................................................1052
26.1.1
Circuit connection examples.................................................................................................... 1052
26.1.2
Interface signals ...................................................................................................................... 1056
26.1.3
Maskable functions.................................................................................................................. 1057
26.1.4
Cautions .................................................................................................................................. 1058