Fujitsu FR81S User Manual
FUJITSU SEMICONDUCTOR LIMITED
CONTENTS
FUJITSU SEMICONDUCTOR CONFIDENTIAL
7.
Q&A ......................................................................................................................................... 1057
7.1.
How to Set the 0.5 Second Count Interval? ................................................................ 1058
7.2.
How to Initialize the Real-time Clock? ......................................................................... 1059
7.3.
How to Set/Update Number of Days (Day) and Time (Hour/Minute/Second)? ........... 1060
7.4.
How to Start/Stop the Count of the Real-time Clock? .................................................. 1061
7.5.
How to Confirm That the Real-time Clock Is Running? ............................................... 1062
7.6.
How to Know the Number of Days and Time? ............................................................. 1063
7.7.
How to Stop the Real-time Clock? ............................................................................... 1064
7.8.
How to Calibrate the Real-time Clock? ........................................................................ 1065
7.9.
What Are Interrupt Related Registers? ........................................................................ 1066
7.10.
What Are the Interrupt Types and How to Select Them? ............................................ 1067
7.11.
How to Enable Interrupts? ........................................................................................... 1068
8.
S
AMPLE
P
ROGRAM
.................................................................................................................... 1069
9.
N
OTES
...................................................................................................................................... 1070
CHAPTER 29: RTC/WDT1 CALIBRATION ...................................................................................... 1071
1.
O
VERVIEW
................................................................................................................................ 1072
2.
F
EATURES
................................................................................................................................. 1073
3.
C
ONFIGURATION
........................................................................................................................ 1074
4.
R
EGISTERS
............................................................................................................................... 1075
4.1.
Calibration Unit Control Register 0 : CUCR0 (Calibration Unit Control Register 0) .... 1076
4.2.
Sub Clock Timer Data Register : CUTD0 (Calibration Unit Timer Data register 0) ..... 1078
4.3.
Main Oscillation Timer Result Register 0 : CUTR0 (Calibration Unit Timer Result
register 0) ................................................................................................................... 1079
4.4.
Calibration Unit Control Register 1 : CUCR1 (Calibration Unit Control Register 1) .... 1080
4.5.
CR Clock Timer Data Register : CUTD1 (Calibration Unit Timer Data register 1)....... 1082
4.6.
Main Oscillation Timer Result Register 1 : CUTR1 (Calibration Unit Timer Result register
1) ................................................................................................................................ 1083
5.
O
PERATION
............................................................................................................................... 1084
5.1.
Real-Time Clock (RTC) Calibration ............................................................................. 1085
5.2.
Measurement of Errors in CR Clock ............................................................................ 1086
5.3.
Note ............................................................................................................................. 1087
CHAPTER 30: POWER CONSUMPTION CONTROL ..................................................................... 1089
1.
O
VERVIEW
................................................................................................................................ 1090
2.
F
EATURES
................................................................................................................................. 1091
3.
C
ONFIGURATION
........................................................................................................................ 1092
4.
R
EGISTERS
............................................................................................................................... 1094
4.1.
Standby Control Register: STBCR (STandby mode Control Register) ........................... 1095
4.2.
PMU Control Register : PMUCTLR (Power Management Unit ConTroL register) .......... 1097
4.3.
PoWeR on TiMing Control Register : PWRTMCTL (PoWeR on TiMing ConTroL register)
.................................................................................................................................... 1098
4.4.
PMU Interrupt Flag Register 0 : PMUINTF0 (Power Management Unit INTerrupt Flag0
register) ...................................................................................................................... 1099
4.5.
PMU Interrupt Flag Register 1 : PMUINTF1 (Power Management Unit INTerrupt Flag1
register) ....................................................................................................................... 1100
4.6.
PMU Interrupt Flag Register 2 : PMUINTF2 (Power Management Unit INTerrupt Flag2
register) ....................................................................................................................... 1101
5.
O
PERATION
................................................................................................................................ 1102
5.1.
Clock Control .................................................................................................................... 1103
5.1.1.
Division Setting ...................................................................................................................................... 1104
5.1.2.
Stopping of Unused Clocks .................................................................................................................. 1105
5.2.
List of Clocks Supplied in Low-power Consumption Mode .............................................. 1106
5.3.
Sleep Mode ...................................................................................................................... 1107
5.3.1.
CPU Sleep Mode ................................................................................................................................... 1108
5.3.2.
Bus Sleep Mode .................................................................................................................................... 1109
5.3.3.
Configuration of Sleep Mode ............................................................................................................... 1110
5.3.4.
Activation of Sleep mode ...................................................................................................................... 1111
5.3.5.
Wake Up from the Sleep Mode ............................................................................................................ 1112
MB91520 Series
MN705-00010-1v0-E
(23)