參數(shù)資料
型號: S-3531A
廠商: Seiko Instruments Inc.
英文描述: CMOS Real-Time Clock IC Supporting an IIC-Bus(支持IIC-BUS的CMOS實時時鐘芯片)
中文描述: CMOS實時時鐘IC支持一個IIC總線(支持IIC總線的實時時鐘芯片的CMOS)
文件頁數(shù): 6/31頁
文件大小: 185K
代理商: S-3531A
REAL-TIME CLOCK
S-3531A
Seiko Instruments Inc.
5
1-6.
Data reading
After a start condition is detected from the outside, the device code and command are received. At this point, the
real-time reading mode or status register reading mode is entered when the read/write bit is "1". In either the real-
time reading mode or status register reading mode, data are output in the order from LSB.
Command
S
T
A
R
T
0
1 1
0
R
E
A
D
S
T
O
P
DEVICE
ADDRES
R
/
W
M
S
B
SDA LINE
0
1 0
A
C
K
L
S
B
A
C
K
1
Real-time data
access 1 command
(1)Real-time data reading 1
Year data
L
S
B
M
S
B
L
S
B
M
S
B
Second data
S
T
A
R
T
0
1 1
0
R
E
A
D
S
T
O
P
DEVICE
ADDRES
R
/
W
M
S
B
SDA LINE
0
1 1
A
C
K
L
S
B
A
C
K
1
Command
Real-time data
access 2 command
(2)Real-time data reading 2
Hour data
L
S
B
M
S
B
L
S
B
M
S
B
Second data
S
T
A
R
T
0
1 1
0
R
E
A
D
DEVICE
ADDRES
R
/
W
M
S
B
SDA LINE
0
1
A
C
K
L
S
B
1
Command
Status register
access command
(3)Status register reading
Status data
L
S
B
M
S
B
0
S
T
O
P
Figure 7 Read communication
A
C
K
NO ACK from
Master Device
A
C
K
NO ACK from
Master Device
NO ACK from
Master Device
NOTE
ACK Top:Generate from master device
Bottom:Generate from S-3531A
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