24C02 データシートの表示（PDF） - Tiger Electronic

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24C02

Two-wire Serial EEPROM

Tiger Electronic 

requires an 11-bit data word address for random word addressing.

24C02/04/08/16

Device Operation

CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an external device. Data

on the SDA pin may change only during SCL low time periods (see to Figure 1 on page 4). Data changes

during SCL high periods will indicate a start or stop condition as defined below.

START CONDITION: A high-to-low transition of SDA with SCL high is a start condition which must

precede any other command (see to Figure 2 on page 4).

STOP CONDITION: A low-to-high transition of SDA with SCL high is a stop condition. After a read

sequence, the stop command will place the EEPROM in a standby power mode (see Figure 2 on page

4).

ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the EEPROM in

8-bit words. The EEPROM sends a "0" to acknowledge that it has received each word. This happens

during the ninth clock cycle. STANDBY MODE: The K24C02/K24C04/K24C08/K24C16 features a

low-power standby mode which is enabled: (a) upon power-up and (b) after the receipt of the STOP bit

and the completion of any internal operations

MEMORY RESET: After an interruption in protocol, power loss or system reset, any two-wire part can be

reset by following these steps:

1. Clock up to 9 cycles.

2. Look for SDA high in each cycle while SCL is high.

3. Create a start condition.

4

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