S-34C02A

Seiko Instruments Inc.

10

3. Data Transmission

Data is transmitted by changing the SDA line while the SCL line is “L”.

If the SDA line changes while the SCL line is “H”, the S-34C02A goes in the start or stop condition status.

SCL

SDA

(in)

Figure 7 Data Transmission Timing

4. Acknowledgment

Data is transmitted sequentially in 8-bit. Changing the SDA line to “L” indicates that the devices on the system bus

have received data, thus the devices send an acknowledgment signal back during the 9th clock of cycle.

The S-34C02A does not send an acknowledgment signal back during the Write operation.

1

8

9

Start Condition

SCL

SDA

(in)

SDA

(out)

Acknowledgement

Output

Figure 8 Acknowledgment Output Timing