RTC-58321 查看數據表（PDF） - Seiko Epson Corp
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RTC-58321 Datasheet PDF : 12 Pages
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RTC-58321/58323
n Registers
1. Register table
Address
D3
(hexadecimal) (A3)
0
0
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
1
9
1
A
1
B
1
C
1
D
1
E
1
F
1
D2
D1
(A2) (A1)
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
D0 Register
DATA
(A0) name
D3
D2
D1
0
S1
s8
s4
s2
1
S0
*
s40
s20
0
MI1
mi8
mi4
mi2
1
MI10
*
mi40
mi20
0
H1
h8
h4
h2
1
H10
24/12 pm/am
h20
0
W
*
w4
w2
1
D1
d8
d4
d2
0
D10
Leap year select
d20
1
MO1
mo8
mo4
mo2
0
MO10
*
*
*
D0
s1
s10
mi1
mi10
h1
h10
w1
d1
d10
mo1
mo10
1
Y1
y8
y4
y2
y1
0
Y10
y80
y40
y20
y10
1
*
*
*
*
0
1hour 1minute 1second 1024Hz
1
Count value
0 to 9
0 to 5
0 to 9
0 to 5
0 to 9
0 to 1 or 0 to 2
0 to 6
0 to 9
0 to 3
0 to 9
0 to 1
0 to 9
0 to 9
Notes
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
2. Notes
(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.
n Register functions
1. Date and time registers
(1) The register values are in BCD, and used positive logic.
E.g.(S8, S4, S2, S1) = (1, 0, 0, 1) = 9 seconds
(2) Day-of-week register
The value is coded as 0 to 6, with Sunday = 0.
Code
0
1
2
3
4
5
6
Day
Sun. Mon. Tue. Wed. Thu. Fri. Sat.
(3) pm/am, h20 and h10 registers
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 D3 to 1 for the 24-hour, and to 0 for the 12-hour clock.
Set D2 to 1 for pm and to 0 for am. Writing a 1 to bit D3 automatically resets bit D2 to 0.
Selection
12-hour clock
24-hour clock
Value range
12:00 to 11:59 am and pm *
00:00 to 23:59
* Note: 12:00 am represents 12:00 midnight, and 12:00 pm represents 12:00 noon.
(4) Y1 and Y10 Leap year selection
Bits D3 and D2 of the day tens register select the year value module 4 to be used for leap years.
Calendar
D3
D2
Standard calendar
0
0
0
1
1
0
1
1
Value module 4 for leap year
0
3
2
1
(5) Do not set the clock to impossible dates (17:34 pm on February 30th, for example). The results are unpredictable.
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