RTC-58323 EPSON [Epson Company], RTC-58323 Datasheet - Page 9

• Manufacturer Part Number: RTC-58323
• Description: Real time clock module(4-bit I/O CONNECTION REAL TIME CLOCK MODULE)
• Manufacturer: EPSON [Epson Company]

RTC-58321/58323
n Registers
n Register functions
1. Register table
2. Notes
1. Date and time registers
(hexadecimal)
(1) The device uses positive logic, and a logic high voltage corresponds to a 1 in a register bit.
(2) Do not set the clock to impossible dates (17:34 pm on February 30th, for example). The results are unpredictable.
(3) When the device is powered on, the initial settings of all bits are undefined.
(1) The register values are in BCD, and used positive logic.
(2) Day-of-week register
(3) pm/am, h
(4) Y
(5) Do not set the clock to impossible dates (17:34 pm on February 30th, for example). The results are unpredictable.
Address
E.g.(S
The value is coded as 0 to 6, with Sunday = 0.
The range of these values depends on whether the 12-hour or 24-hour clock is being used.
The pm/am bit is used only when the 12-hour clock is selected.
Set D
Set D
* Note: 12:00 am represents 12:00 midnight, and 12:00 pm represents 12:00 noon.
Bits D
A
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
1
Standard calendar
and Y
Code
Day
3
2
3
8
, S
to 1 for the 24-hour, and to 0 for the 12-hour clock.
to 1 for pm and to 0 for am. Writing a 1 to bit D
Calendar
and D
10
20
4
(A
, S
Leap year selection
D
and h
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
3
3
)
12-hour clock
24-hour clock
2
2
, S
of the day tens register select the year value module 4 to be used for leap years.
Selection
Sun.
(A
1
10
0
D
) = (1, 0, 0, 1) = 9 seconds
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
2
2
registers
)
Mon.
(A
D
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
1
)
D
0
0
1
1
3
(A
Tue.
D
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
0
0
)
D
0
1
0
1
Register
2
Wed. Thu.
name
MO
MO
MI
MI
H
D
Y
S
S
H
W
D
Y
3
10
10
10
1
0
10
1
1
1
1
10
1
Value module 4 for leap year
4
Leap year select
12:00 to 11:59 am and pm *
24/12
1hour
mo
mi
D
y
s
h
d
y
*
*
*
*
80
*
8
8
8
8
3
8
8
3
Fri.
00:00 to 23:59
5
automatically resets bit D
Value range
Page - 6
1minute 1second
pm/am
mi
mo
mi
s
y
D
w
s
h
d
y
*
*
40
40
4
4
2
40
4
4
4
4
4
Sat.
0
3
2
1
DATA
6
mi
mo
mi
s
h
d
y
D
w
s
h
d
y
*
*
20
20
20
20
2
2
2
2
1
20
2
2
2
1024Hz
mo
mi
mo
mi
h
d
s
y
D
w
s
h
d
y
10
*
10
10
10
1
1
1
1
0
10
1
10
1
1
2
to 0.
0 to 1 or 0 to 2
Count value
0 to 9
0 to 5
0 to 9
0 to 5
0 to 9
0 to 6
0 to 9
0 to 3
0 to 9
0 to 1
0 to 9
0 to 9
Seconds units register
Seconds tens register
Minutes units register
Minutes tens register
Hours units register
Hours tens register
Day-of-week register
Day units register
Day tens register
Month units register
Month tens register
Year units register
Year tens register
Reset register
Reference signal registers
Notes