S24C01A データシートの表示（PDF） - Seiko Instruments Inc

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S24C01A

CMOS 2-WIRE SERIAL EEPROM

Seiko Instruments Inc 

Rev. 2.2_30

CMOS 2-WIRE SERIAL EEPROM

S-24C01A/02A/04A

„ Operation

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

condition.

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

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.

tSU.STA

tHD.STA

tSU.STO

SCL

SDA

Start

Condition

Figure 6 Start/Stop Conditions

Stop

Condition

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."

tSU.DAT

tHD.DAT

SCL

SDA

Figure 7 Data Transmission Timing

Seiko Instruments Inc.

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