S-35390A Seiko Instruments, S-35390A Datasheet - Page 30

• Manufacturer Part Number: S-35390A
• Description: 2-Wire Real Time Clock
• Manufacturer: Seiko Instruments

30
2-WIRE REAL-TIME CLOCK
S-35390A
(5) Clock adjustment register access
(6) Free register access
*1. 0: INT1 register_1 selected, 1:INT1 register_2 selected
*2. During reading, set NO_ACK to 1.
*1. During reading, set NO_ACK to 1.
*1. During reading, set NO_ACK to 1.
Figure 30 INT1 Register_1 and INT1 Register_2 (Frequency Duty Data) Access
SDA
SDA
SCL
SCL
SCL
SDA
I/O mode switching
Figure 31 Clock Adjustment Register Access
I/O mode switching
I/O mode switching
0
0
0
MSB
MSB
MSB
Command
Command
1
1
1
Command
1
1
1
Figure 32 Free Register Access
1
1
1
Seiko Instruments Inc.
0
0
*1
0
1
1
1
1
0
LSB
1
LSB
LSB
0
1
R/W
R/W
R/W
LSB
9
LSB
Free register
data
LSB
9
9
Clock
adjustment
data
Status data
MSB
MSB
MSB
I/O mode switching
I/O mode switching
I/O mode switching
18
18
18
Rev.1.2
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