S-35392A Datasheet, PDF (30/47 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

2-WIRE REAL-TIME CLOCK
S-35392A
Rev.1.3_00
(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.
1-byte data
1
9
18
SCL
SDA
R/W
0 110 000 0
B7
B0
Device code + command
: Output from S-35392A
: Input from master device
Figure 32 Example of Data Write 1 (1-Byte Data Register)
3-byte data
1
9
SCL
SDA
R/W
0 110 011 0
B7
Device code + command
: Output from S-35392A
: Input from master device
18
B0 B7
27
B0 B7
36
B0
Figure 33 Example of Data Read 2 (3-Byte Data Register)
30
Seiko Instruments Inc.