S-35392A Datasheet, PDF (31/47 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

Rev.1.3_00
2-WIRE REAL-TIME CLOCK
S-35392A
4. Data access
(1) Real-time data 1 access
1
9
18
63
72
SCL
SDA
R/W
0 1 1 00 1 0
Device code +
command
I/O mode switching
B7
B0
Year data
I/O mode switching
B7
B0
Second data
*1. Set NO_ACK = 1 in Read.
*2. Transmit ACK = 0 from the master device to the S-35392A in Read.
Figure 34 Real-Time Data 1 Access
(2) Real-time data 2 access
1
9
18
27
36
SCL
R/W
SDA
0 1 1 00 11
Device code +
command
B7
B0
Hour data
B7
B0 B7
B0
Minute data
Second data
I/O mode switching
I/O mode switching
*1. Set NO_ACK = 1 in Read.
*2. Transmit ACK = 0 from the master device to the S-35392A in Read.
Figure 35 Real-Time Data 2 Access
(3) Status register 1 access and status register 2 access
1
9
18
SCL
SDA
*1
R/W
0 11000
Device code +
command
B7
B0
Status data
I/O mode switching
I/O mode switching
*1. 0 : Status register 1 selected, 1 : Status register 2 selected
*2. Set NO_ACK = 1 in Read.
Figure 36 Status Register 1 Access and Status Register 2 Access
Seiko Instruments Inc.
31