Fujitsu FR81S User Manual
CHAPTER 28: REAL-TIME CLOCK(RTC)
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: REAL-TIME CLOCK(RTC)
FUJITSU SEMICONDUCTOR CONFIDENTIAL
13
4.3. Day/Hour/Minute/Second Register : WTDR/ WTHR/
WTMR/ WTSR
The bit configuration of the Day/Hour/Minute/Second register (WTDR/WTHR/WTMR/WTSR)
is shown below.
These registers indicate the time information of the real-time clock (Day/ Hour/ Minute/ Second).
WTDR (day register) : Address 055E
H
(Access: Half-word)
WTHR (hour register) : Address 0568
H
(Access: Byte, Half-word)
WTMR (minute register) : Address 0569
H
(Access: Byte, Half-word)
WTSR (second register) : Address 056A
H
(Access: Byte)
WTDR
bit15
bit14
bit13
bit12
bit11
bit10
bit9
bit8
N15
N14
N13
N12
N11
N10
N9
N8
Initial value
0
0
0
0
0
0
0
0
Attribute
R,W
R,W
R,W
R,W
R,W
R,W
R,W
R,W
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
N7
N6
N5
N4
N3
N2
N1
N0
Initial value
0
0
0
0
0
0
0
0
Attribute
R,W
R,W
R,W
R,W
R,W
R,W
R,W
R,W
WTHR
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
-
-
-
H4
H3
H2
H1
H0
Initial value
-
-
-
0
0
0
0
0
Attribute R1,WX
R1,WX
R1,WX
R,W
R,W
R,W
R,W
R,W
WTMR
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
-
-
M5
M4
M3
M2
M1
M0
Initial value
-
-
0
0
0
0
0
0
Attribute R1,WX
R1,WX
R,W
R,W
R,W
R,W
R,W
R,W
MB91520 Series
MN705-00010-1v0-E
1052