Fujitsu FR81S User Manual
FUJITSU SEMICONDUCTOR LIMITED
CONTENTS
FUJITSU SEMICONDUCTOR CONFIDENTIAL
5.3.6.
Effect of Sleep Mode ............................................................................................................................. 1113
5.4.
Standby Mode : Watch Mode ........................................................................................... 1114
5.4.1.
Configuration of Watch Mode .............................................................................................................. 1115
5.4.2.
Activation of Watch Mode ..................................................................................................................... 1116
5.4.3.
Wake Up from the Watch Mode ........................................................................................................... 1117
5.4.4.
Effect of Watch Mode ............................................................................................................................ 1118
5.5.
Standby Mode : Watch Mode with power-shutdown ........................................................ 1119
5.5.1.
Configuration of Watch Mode with power-shutdown ........................................................................ 1120
5.5.2.
Activation of Watch Mode with power-shutdown ............................................................................... 1121
5.5.3.
Wake Up from the Watch Mode with power-shutdown..................................................................... 1123
5.5.4.
Effect of Watch Mode with power-shutdown ...................................................................................... 1125
5.6.
Standby Mode : Stop Mode .............................................................................................. 1126
5.6.1.
Configuration of Stop Mode.................................................................................................................. 1127
5.6.2.
Activation of Stop Mode ........................................................................................................................ 1128
5.6.3.
Wake Up from the Stop Mode .............................................................................................................. 1129
5.6.4.
Effect of Stop Mode ............................................................................................................................... 1130
5.7.
Standby Mode : Stop Mode with power-shutdown ........................................................... 1131
5.7.1.
Configuration of Stop Mode with power-shutdown ........................................................................... 1132
5.7.2.
Activation of Stop Mode with power-shutdown .................................................................................. 1133
5.7.3.
Wake Up from the Stop Mode with power-shutdown ........................................................................ 1135
5.7.4.
Effect of Stop Mode with power-shutdown ......................................................................................... 1137
5.8.
Stop State of Microcontroller ............................................................................................ 1138
5.9.
Transition to Illegal Standby Mode ................................................................................... 1139
5.10.
Restrictions on Power-Shutdown and Normal Standby Control ................................... 1140
6.
E
XAMPLE OF
U
SE
....................................................................................................................... 1142
CHAPTER 31: INTERNAL LOW-VOLTAGE DETECTION (INTERNAL POWER SUPPLY
LOW-VOLTAGE DETECTION) ......................................................................................................... 1143
LOW-VOLTAGE DETECTION) ......................................................................................................... 1143
1.
O
VERVIEW
................................................................................................................................. 1144
2.
F
EATURES
.................................................................................................................................. 1145
3.
C
ONFIGURATION
......................................................................................................................... 1146
4.
R
EGISTERS
................................................................................................................................ 1147
4.1.
Internal Low-Voltage Detection Register : LVD (Low-Voltage Detect internal power fall
register) ....................................................................................................................... 1148
5.
O
PERATION
................................................................................................................................ 1150
5.1.
Internal Low-voltage Detection ......................................................................................... 1151
6.
N
OTES
....................................................................................................................................... 1152
CHAPTER 32: LOW-VOLTAGE DETECTION (EXTERNAL LOW-VOLTAGE DETECTION) ......... 1153
1.
O
VERVIEW
................................................................................................................................. 1154
2.
F
EATURES
.................................................................................................................................. 1155
3.
C
ONFIGURATION
......................................................................................................................... 1156
4.
R
EGISTERS
................................................................................................................................ 1157
4.1.
External Low-Voltage Detection Rise Detection Register : LVD5R (Low-Voltage Detect
external 5v Rise register) ............................................................................................ 1158
4.2.
External Low-Voltage Detection Fall Detection Register : LVD5F (Low-Voltage Detect
external 5v Fall register) .............................................................................................. 1159
5.
O
PERATION
................................................................................................................................ 1161
6.
N
OTES
....................................................................................................................................... 1162
CHAPTER 33: WILD REGISTER ..................................................................................................... 1163
1.
O
VERVIEW
................................................................................................................................. 1164
2.
F
EATURES
.................................................................................................................................. 1165
3.
C
ONFIGURATION
......................................................................................................................... 1166
4.
R
EGISTERS
................................................................................................................................ 1167
4.1.
Wild Register Data Enable Register : WREN (Wild Register ENable register) ...... 1169
4.2.
Wild Register Address Register 00 to 15 : WRAR00 to 15 (Wild Register Address Register
00 to 15) ...................................................................................................................... 1170
MB91520 Series
MN705-00010-1v0-E
(24)