
User’s Manual U16541EJ4V0UD
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24.6.3
Securing oscillation stabilization time when releasing STOP mode......................................... 923
24.7
Subclock Operation Mode ....................................................................................................924
24.7.1
Setting and operation status .................................................................................................... 924
24.7.2
Releasing subclock operation mode ........................................................................................ 924
24.8
Sub-IDLE Mode ......................................................................................................................926
24.8.1
Setting and operation status .................................................................................................... 926
24.8.2
Releasing sub-IDLE mode....................................................................................................... 926
CHAPTER 25 RESET FUNCTIONS......................................................................................................928
25.1
Overview.................................................................................................................................928
25.2
Registers to Check Reset Source........................................................................................929
25.3
Operation................................................................................................................................930
25.3.1
Reset operation via RESET pin ............................................................................................... 930
25.3.2
Reset operation by watchdog timer 2 ...................................................................................... 932
25.3.3
Reset operation by low-voltage detector.................................................................................. 934
25.3.4
Operation after reset release ................................................................................................... 935
25.3.5
Reset function operation flow .................................................................................................. 938
CHAPTER 26 CLOCK MONITOR .........................................................................................................939
26.1
Functions ...............................................................................................................................939
26.2
Configuration .........................................................................................................................939
26.3
Register ..................................................................................................................................940
26.4
Operation................................................................................................................................941
CHAPTER 27 LOW-VOLTAGE DETECTOR (LVI)..............................................................................944
27.1
Functions ...............................................................................................................................944
27.2
Configuration .........................................................................................................................944
27.3
Registers ................................................................................................................................945
27.4
Operation................................................................................................................................947
27.4.1
To use for internal reset signal ................................................................................................ 947
27.4.2
To use for interrupt .................................................................................................................. 948
27.5
RAM Retention Voltage Detection Operation.....................................................................949
27.6
Emulation Function...............................................................................................................950
CHAPTER 28 REGULATOR ..................................................................................................................951
28.1
Outline ..................................................................................................................................951
28.2
Operation................................................................................................................................952
CHAPTER 29 ROM CORRECTION FUNCTION .................................................................................953
29.1
Overview.................................................................................................................................953
29.2
Registers ................................................................................................................................954
29.3
ROM Correction Operation and Program Flow ..................................................................956
29.4
Cautions .................................................................................................................................958
CHAPTER 30 FLASH MEMORY...........................................................................................................959
30.1
Features..................................................................................................................................959