Fujitsu FR81S Benutzerhandbuch
CHAPTER 28: REAL-TIME CLOCK(RTC)
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: REAL-TIME CLOCK(RTC)
FUJITSU SEMICONDUCTOR CONFIDENTIAL
7
4.1. RTC Control Register : WTCR
The bit configuration of the RTC control register is shown below.
This register controls the operations of the real-time clock module.
WTCRH : Address 0561
H
(Access: Byte)
WTCRM : Address 0562
H
(Access: Byte, Half-word)
WTCRL : Address 0563
H
(Access: Byte, Half-word)
bit23
bit22
bit21
bit20
bit19
bit18
bit17
bit16
-
-
-
-
-
-
INTE4
INT4
Initial value
-
-
-
-
-
-
0
0
Attribute R1,WX
R1,WX
R1,WX
R1,WX
R1,WX
R1,WX
R/W
R(RM1), W
bit15
bit14
bit13
bit12
bit11
bit10
bit9
bit8
INTE3
INT3
INTE2
INT2
INTE1
INT1
INTE0
INT0
Initial value
0
0
0
0
0
0
0
0
Attribute
R/W
R(RM1), W
R/W
R(RM1), W
R/W
R(RM1), W
R/W
R(RM1), W
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
Reserved Reserved Reserved Reserved
RUN
UPDT
Reserved
ST
Initial value
0
0
0
0
0
0
0
0
Attribute
R/W0
R/W0
R/W0
R/W0
R,WX R(RM0),W R/W0
R/W
This register will be initialized by all reset source without the return reset from watch mode (power
shut-down).
[bit23 to bit18] - : Undefined
The read value is always "1". The data writing does not affect the operation.
[bit17] INTE4 : 0.5 second interrupt request enable
INTE4
Operation
0
0.5 second interrupt request disabled
1
0.5 second interrupt request enabled
MB91520 Series
MN705-00010-1v0-E
1046