S-24C01A Seiko Instruments Inc, S-24C01A Datasheet - Page 7

• Manufacturer Part Number: S-24C01A
• Description: CMOS 2-WIRE SERIAL EEPROM
• Manufacturer: Seiko Instruments Inc

Rev. 2.2
Operation
1. Start Condition
2. Stop Condition
3. Data Transmission
When the SCL line is "H," the SDA line changes from "H" to "L." This allows the device to go to the start
condition.
All operations begin from the start condition.
When the SCL line is "H," the SDA line changes from "L" to "H." This allows the device to go to the stop
condition.
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
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."
SDA
SCL
SCL
SDA
_30
Start
Condition
t
SU.STA
t
SU.DAT
t
HD.STA
Figure 7 Data Transmission Timing
Figure 6 Start/Stop Conditions
Seiko Instruments Inc.
.
t
HD.DAT
CMOS 2-WIRE SERIAL EEPROM
t
SU.STO
Stop
Condition
S-24C01A/02A/04A
7