rtc-4553ac Epson Electronics America, Inc., rtc-4553ac Datasheet - Page 10

• Manufacturer Part Number: rtc-4553ac
• Description: Real Time Clock Module
• Manufacturer: Epson Electronics America, Inc.

RTC – 4553AC
8. How to use
8.1. Registers
8.1.1. Register Table
* In positive logic, "H" on the data bus corresponds to "1" in the register.
Notes
C
D
0
1
2
3
4
5
6
7
8
9
A
B
E
F
"ADDRESS_F" of MODE 1 and MODE 2 is the same as "ADDRESS_F" of MODE 0.
(1) Do not set invalid (out of range) data for the time and calendar. Otherwise counting errors may occur.
(2) At power-on (before initialization), the data for each bit are cleared. Write the registers to set the values.
(3) Always set the D0 bit (
(4) When reading the D1 bit (— bit) of the control register 2, data of this bit are undefined.
(5) Always set the D3 bit (TEST bit) of the control register 3 to "0".
A3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Address
A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
designation
Register
CNT 1
CNT 2
CNT 3
MO10
MI10
MO1
bit) of the control register 2 to "0".
H10
D10
S10
MI1
Y10
S1
H1
D1
Y1
W
BUSY
SYSR
TPS
PM/
mo
mi
D3
y
S
h
AM
d
y
0
0
0
0
0
80
8
8
8
8
8
8
MODE 0
30ADJ
PONC
TEST
mi
mo
S
mi
D2
y
S
w
h
d
y
0
0
0
40
40
4
4
4
4
40
4
4
4
0
Page - 7
CNTR
A3 A2 A1 A0
MS1
mi
mo
0
S
mi
D1
h
d
y
—
S
w
h
d
y
0
Counter control register
20
20
20
20
Address
2
2
2
2
20
2
2
2
0
MODE 1 (User RAM register 1)
0
24/
A3 A2 A1 A0
mo
MS0
mi
mo
0
S
mi
D0
h
d
y
S
w
h
d
y
10
10
10
10
Address
1
1
1
1
10
1
1
10
12
0
1
MODE 2 (User RAM register 2)
0
Day of the week digit counter
0
10-second digit counter
10-minute digit counter
10-month digit counter
1-second digit counter
1-minute digit counter
1-month digit counter
10-hour digit counter
10-year digit counter
10-day digit counter
0
1-hour digit counter
1-year digit counter
1-day digit counter
Control register 1
Control register 2
Control register 3
RA3 RA2 RA1
Register name
D3
0
User RAM register
D2
RA
D3
63
User RAM register
D1
RA
D2
62
RA
RA
RA
RA
RA
RA
RA
RA
RA
RA
RA
RA
MS0
MQ - 342 - 01
RA
RA
RA
RA
D0
D1
12
16
20
24
28
32
36
40
44
48
52
56
0
4
8
61
RA
RA
RA
RA
RA
RA
RA
RA
RA
RA
RA
RA
RA
RA
RA
MS0
D0
100
104
108
112
116
60
64
68
72
76
80
84
88
92
96