CMOS 2-WIRE SERIAL EEPROM
1. Start Condition
When the SCL line is "H," the SDA line changes from "H" to "L." This allows the device to go to the start
All operations begin from the start condition.
2. Stop Condition
When the SCL line is "H," the SDA line changes from "L" to "H." This allows the device to go to the stop
When the device receives the stop condition signal during a read sequence, the read operation is
interrupted, and the device goes to standby mode.
When the device receives the stop condition signal during write sequence, the retrieval of write data is
halted, and the EEPROM initiates rewrite.
Figure 6 Start/Stop Conditions
3. Data Transmission
Changing the SDA line while the SCL line is "L" allows the data to be transmitted. A start or stop condition
is recognized when the SDA line changes while the SCL line is "H."
Figure 7 Data Transmission Timing
Seiko Instruments Inc.