X24042PI datasheet(4/15 Pages) XICOR

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X24042

Acknowledge

Acknowledge is a software convention used to indicate

successful data transfers. The transmitting device will

release the bus after transmitting eight bits. During the

ninth clock cycle the receiver will pull the SDA line LOW

to acknowledge that it received the eight bits of data.

Refer to Figure 3.

The X24042 will respond with an acknowledge after

recognition of a start condition and its slave address. If

both the device and a write operation have been se-

lected, the X24042 will respond with an acknowledge

after the receipt of each subsequent eight bit word.

In the read mode the X24042 will transmit eight bits of

data, release the SDA line and monitor the line for an

acknowledge. If an acknowledge is detected and no

stop condition is generated by the master, the X24042

will continue to transmit data. If an acknowledge is not

detected, the X24042 will terminate further data trans-

missions. The master must then issue a stop condition

to return the X24042 to the standby power mode and

place the device into a known state.

Figure 3. Acknowledge Response From Receiver

SCL FROM

MASTER

DATA

OUTPUT

FROM

TRANSMITTER

DATA

OUTPUT

FROM

RECEIVER

START

ACKNOWLEDGE

3849 FHD F08

X24042PI Datasheet(PDF) 4 Page - Xicor Inc.