POLLING FOR AN ACK SIGNAL

When the master issues a stop condition to initiate a write cycle, the 24LLC02 starts an internal write cycle.

The master can then immediately begin polling for an ACK from the slave device.

To poll for an ACK signal in a write operation, the master issues a start condition followed by the slave address.

As long as the 24LLC02 remains busy with the write operation, no ACK is returned. When the 24LLC02

completes the write operation, it returns an ACK and the master can then proceed with the next read or write

operation (see Figure 1-11).

Send Write

Command

Send Stop Condition to

Initiate Write Cycle

Send Start

Condition

Send Slave Address

with R/ W bit = "0"

Start Next

Operation

ACK = "0" ?

Yes

No

Figure 1-11. Master Polling for an ACK Signal from a Slave Device

* All specs and applications shown above subject to change without prior notice.

1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C

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Tel:886-3-3529445

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Rev 1.2 May 6,2002

24LLC02

2K-bit Serial EEPROM for Low Power