ACE24LA02.04.08.16A

Two-wire Serial EEPROM

VER 1.1

5

Start Condition:

A high-to-low transition of SDA with SCL high is a start condition which must precede any other command

(see Figure 2).

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).

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 ACE24LA02.04.08.16A 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 and then.

3. Create a start condition.

Figure 1: Data Validity

Figure 2: Start and Stop Definition