S-35710B01A-K8T2U Datasheet, PDF (19/33 Pages) Seiko Instruments Inc – Low current consumption

Rev.1.5_00
FOR AUTOMOTIVE 125°C OPERATION 2-WIRE CONVENIENCE TIMER
S-35710 Series
4. Data transmission format
After the start condition transmission, the 1st byte is a slave address and a command (read / write bit) that shows the
transmission direction of the data at the 2nd byte or subsequent bytes.
The slave address of the S-35710 Series is specified to "0110010". The data can be written to the wake-up time
register when read / write bit is "0", and the data of the wake-up time register or the time register can be read when
read / write bit is "1".
When the data can be written to the wake-up time register, input the data from the master device in order of B7 to B0.
The acknowledge ("L") is output from the S-35710 Series whenever a 1-byte data is input.
When the data of the wake-up time register or the time register can be read, the data from the S-35710 Series is
output in order of B7 to B0 in byte unit. Input the acknowledge ("L") from the master device whenever a 1-byte data is
input. However, do not input the acknowledge for the last data byte (NO_ACK). By this, the end of the data read is
informed.
After the master device receives / transmits the acknowledge for the last data byte, input the stop condition to the
S-35710 Series to finish the access operation.
When the master device inputs start condition without inputting stop condition at this time, the S-35710 Series
becomes restart condition, and can transmit / receive the data continuously if the master device inputs the slave
address continuously.
1
9
18
27
36
45
SCL
Data write
format
Data read
format
SDA ^ST Slave address ^{0 A}
B7
B1 R/W B7
SDA _{ST Slave address 1 A}
B7
B1 R/W B7
Data
Data
A
B0 B7
A
B0 B7
Data
Data
A
B0 B7
A
B0 B7
Data
Data
A
B0 B7
Data
A SP
B0
A SP
B0
Restart format _{SDA ST Slave address 0 A}
Data
A
Data
A
Data
A
Data
A
B7
B1 R/W B7
B0 B7
B0 B7
B0 B7
B0
ST _{Slave address} 1 A
B7
B1 R/W B7
Data
: Master device input data
: S-35710 output data
A
B0 B7
Data
A
B0 B7
ST : Start condition
A A A : Acknowledge
Data
A SP
B0
SP : Stop condition
Figure 26 Data Transmission Format of Serial Interface
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