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Data Sheet

ManualsBrandsDFRobot ManualsGravity PartsGravity I2C Real Time Clock Module (SD2405)
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SD2405ALPI IIC 串行接口的实时时钟IC
!
11
I
N
T
Active-Low Interrupt or Square-Wave Output. This
open-drain pin requires an external pullup resistor
connected to a supply at 5.5V or less. If not used,
this pin can be left float
Open-N-channel output
12
V
DD
DC Power Pin for Primary Power Supply. This pin
should be decoupled using a 0.1µF
3
.
3
V
～
5
.
5
V
15
V
O
U
T
3.0V Output Power Pin
I
≤
30
m
A ，V=
3.0V
±
2%
5.Registers
5.1 Table of the RTC registers
5.2 Real Time Clock Registers [00h to 06h]
These RTC (Real time clock) registers are stored as binary-coded
decimal
BCD
format.
Seconds and Minutes: range from 0 to 59;
Hour : can be set 12-hour or 24-hour mode;
day : from 1 to 31,
Month :from 1 to 12,
Year :from 0 to 99,;
Regis
ter
bank
Regis
ter
name
BIT
Value
(
DEC)
Defau
lt
(
BIN
)
D7
D6
D5
D4
D3
D2
D1
D0
Real time
clock
regis
ter
s
Second
0
S40
S20
S10
S8
S4
S2
S1
0-59
XXXX
-
XXXX
Minut
e
0
MN40
MN20
MN10
MN8
MN4
MN
2
MN1
0-59
XXXX
-
XXXX
Hour
12_/2
4
0
H20
P/A
_
H10
H8
H4
H2
H1
0-23
XXXX
-
XXXX
Week
0
0
0
0
0
W4
W2
W1
0-6
XXXX
-
XXXX
Day
0
0
D20
D10
D8
D4
D2
D1
1-31
XXXX
-
XXXX
Month
0
0
0
MO10
MO8
MO4
MO2
MO1
1-12
XXXX
-
XXXX
Year
Y80
Y40
Y20
Y10
Y8
Y4
Y2
Y1
0-99
XXXX
-
XXXX
Time
alarm
regis
ter
s
Second
alarm
0
AS40
AS20
AS10
AS8
AS4
AS2
AS1
0-59
0000-0
000
Minute
alarm
0
AMN40
AMN20
AMN10
AMN8
AMN4
AMN2
AMN1
0-59
0000-0
000
Add.
Regis
ter
bank
Regis
ter
name
BIT
Value
(
DEC)
Defau
lt
(
BIN
)
D7
D6
D5
D4
D3
D2
D1
D0
00H
Real
time
clock
regis
ters
Secon
d
0
S40
S20
S10
S8
S4
S2
S1
0-59
XXXX
-
XXXX
01H
Minut
e
0
MN40
MN20
MN10
MN8
MN4
MN
2
MN1
0-59
XXXX
-
XXXX
02H
Hour
12_/2
4
0
H20
P/A_
H10
H8
H4
H2
H1
0-23
XXXX
-
XXXX
03H
Week
0
0
0
0
0
W4
W2
W1
0-6
XXXX
-
XXXX
04H
Day
0
0
D20
D10
D8
D4
D2
D1
1-31
XXXX
-
XXXX
05H Month
0
0
0
MO10
MO8
MO4
MO2
MO1
1-12
XXXX
-
XXXX
06H
Year
Y80 Y40
Y20
Y10
Y8
Y4
Y2
Y1
0-99
XXXX
-
XXXX
07H
Time
alarm
regis
ters
Second
alarm
0
AS40 AS20 AS10
AS8
AS4
AS2
AS1
0-59
0000-0
000
08H Minute
alarm
0
AMN40
AMN20
AMN10
AMN8
AMN4
AMN2
AMN1
0-59
0000-0
000
09H
Hour
alarm
0
0
AH20
AP/A_
AH10
AH8
AH4
AH2
AH1
0-23
0000-0
000
0AH
Week
alarm
0
AW6
AW5
AW4
AW3
AW
2
AW
1
AW
0
N/A
0000-0
000
0BH
Day
alarm
0
0
AD20
AD10
AD8
AD4
AD2
AD1
1-31
0000-0
000
0CH
Mouth
alarm
0
0
0
AMO10
AMO8
AMO4
AMO2
AMO1
1-12
0000-0
000
0DH
Year
alarm
A
Y7
A
Y6
A
Y5
A
Y4
A
Y3
A
Y2
A
Y1
A
Y0
0-99
0000-0
000
0EH
Alarm
enabl
e
0
EAY
EAMO
EAD
EAW
EAH
EAMN
EAS
N/A
0000-0
000
0FH
Control
regis
ters
CTR1
WRTC3
0
INTAF INTDF
0
WRTC2
0
RTCF
N/A
0000-0
000
10H
CTR2
WRTC1
IM
INTS1 INTS0
FOBAT
INTDE
INTAE
INTFE
N/A
0000-0
000
11H
CTR3
ARST
0
TDS1
TDS0
FS3
FS2
FS1
FS0
N/A
0000-0
000
12H
TTF
0
F6
F5
F4
F3
F2
F1
F0
N/A
0000-0
000
13H Count down
TD7
TD6
TD5
TD4
TD3
TD2
TD1
TD0
0-255
0000-0
000
14~
1FH
Genera
l
RAM
(12B
ytes)
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
N/A
XXXX-X
XXX
Hour
alarm
0
0
AH20
AP/A_
AH10
AH8
AH4
AH2
AH1
0-23
0000-0
000
Week
alarm
0
AW6
AW5
AW4
AW3
AW
2
AW
1
AW
0
N/A
0000-0
000
Day
alarm
0
0
AD20
AD10
AD8
AD4
AD2
AD1
1-31
0000-0
000
Mouth
alarm
0
0
0
AMO10
AMO8
AMO4
AMO2
AMO1
1-12
0000-0
000
Year
alarm
A
Y7
A
Y6
A
Y5
A
Y4
A
Y3
A
Y2
A
Y1
A
Y0
0-99
0000-0
000
Alarm
enabl
e
0
EAY
EAMO
EAD
EAW
EAH
EAMN
EAS
N/A
0000-0
000
Contro
l
regis
ter
s
CTR1
WRTC3
0
INTAF
INTDF
0
WRTC2
0
RTCF
N/A
0000-0
000
CTR2
WRTC1
IM
INTS1
INTS0
FOBAT
INTDE
INTAE
INTFE
N/A
0000-0
000
CTR3
ARST
0
TDS1
TDS0
FS3
FS2
FS1
FS0
N/A
0000-0
000
TTF
0
F6
F5
F4
F3
F2
F1
F0
N/A
0000-0
000
Count down
TD7
TD6
TD5
TD4
TD3
TD2
TD1
TD0
0-255
0000-0
000
Genera
l
RAM
(12B
ytes)
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
N/A
XXXX-X
XXX