
User’s Manual U17790EJ2V0UD
18
CHAPTER 25 RESET FUNCTIONS ..................................................................................................... 968
25.1
Overview................................................................................................................................ 968
25.2
Registers to Check Reset Source....................................................................................... 970
25.3
Operation............................................................................................................................... 971
25.3.1
Reset operation via RESET pin ...............................................................................................971
25.3.2
Reset operation by watchdog timer 2.......................................................................................973
25.3.3
Reset operation by low-voltage detector..................................................................................975
25.3.4
Operation after reset release ...................................................................................................976
25.3.5
Reset function operation flow...................................................................................................977
CHAPTER 26 CLOCK MONITOR ........................................................................................................ 978
26.1
Functions............................................................................................................................... 978
26.2
Configuration ........................................................................................................................ 978
26.3
Register ................................................................................................................................. 979
26.4
Operation............................................................................................................................... 980
CHAPTER 27 LOW-VOLTAGE DETECTOR (LVI) ............................................................................. 983
27.1
Functions............................................................................................................................... 983
27.2
Configuration ........................................................................................................................ 983
27.3
Registers ............................................................................................................................... 984
27.4
Operation............................................................................................................................... 986
27.4.1
To use for internal reset signal.................................................................................................986
27.4.2
To use for interrupt ..................................................................................................................987
27.5
RAM Retention Voltage Detection Operation .................................................................... 988
27.6
Emulation Function .............................................................................................................. 989
CHAPTER 28 REGULATOR ................................................................................................................. 990
28.1
Overview................................................................................................................................ 990
28.2
Operation............................................................................................................................... 991
CHAPTER 29 ROM CORRECTION FUNCTION................................................................................. 992
29.1
Overview................................................................................................................................ 992
29.2
Registers ............................................................................................................................... 993
29.3
ROM Correction Operation and Program Flow ................................................................. 995
29.4
Cautions ................................................................................................................................ 997
CHAPTER 30 FLASH MEMORY .......................................................................................................... 998
30.1
Features................................................................................................................................. 998
30.2
Memory Configuration ......................................................................................................... 999
30.3
Functional Outline .............................................................................................................. 1001
30.4
Rewriting by Dedicated Flash Programmer..................................................................... 1004
30.4.1
Programming environment..................................................................................................... 1004
30.4.2
Communication mode ............................................................................................................ 1005
30.4.3
Flash memory control ............................................................................................................ 1011
30.4.4
Selection of communication mode ......................................................................................... 1012
30.4.5
Communication commands ................................................................................................... 1013
30.4.6
Pin connection ....................................................................................................................... 1014
30.5
Rewriting by Self Programming ........................................................................................ 1019
30.5.1
Overview................................................................................................................................ 1019