Siemens AC75 Manual De Usuario

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AC75_ATC_V01.002

Page 503 of 569

10/30/06

Confidential / Released

when the I²C slave device notifies that it has recognized the I²C Slave Address. 

During a Transmit Transfer, a NAK is given when the I²C Slave Device notifies a failure to receive either the I²C

Slave Address or a data byte. In this case, a Stop Condition is sent to the I²C device. 

During a Receive Transfer, a NAK is transmitted only when the I²C does not receive any reponse for the I²C Slave

Address. The I²C device never acknowledges the validity of the received data (by sending an ACK the master

acknowledges each received byte to the slave).