s-35392a Seiko Instruments Inc., s-35392a Datasheet - Page 30

• Manufacturer Part Number: s-35392a
• Description: 2-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

30
2-WIRE REAL-TIME CLOCK
S-35392A
(2) Data Write in S-35392A
After detecting a start condition, S-35392A receives device code and command. The S-35392A enters the Write-data
mode by the Read/Write bit “0”. Input data from B7 to B0 in 1-byte. The S-35392A outputs an acknowledgment signal
(“L”) every moment that 1-byte data is input. After receiving the acknowledgment signal which is for the last byte-data,
input a stop condition to the S-35392A to finish access.
SDA
SCL
3-byte data
Device code + command
: Output from S-35392A
: Input from master device
0
Figure 32 Example of Data Write 1 (1-Byte Data Register)
Figure 33 Example of Data Read 2 (3-Byte Data Register)
1
1
SDA
1
SCL
1-byte data
0
0
1
Device code + command
1 0
: Output from S-35392A
: Input from master device
R/W
0
B7
9
1
1
Seiko Instruments Inc.
1
0
0
0
0 0
B0
R/W
B7
18
B7
9
B0
B0
18
B7
27
B0
36
Rev.1.3
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