Negative Acknowledge Last Byte
On supported adapters, the doNak checkbox gives you the option to acknowledge, or negatively acknowledge, the last byte read from a slave device. Some Slave Transmitter Devices require a negative acknowledgment on the final byte read from the slave device. I2C adapters not supporting this option automatically negatively acknowledge the last byte read.
5.1.4.1.6Master Transmit and Receive
The Master TxRx button sends a master write message with no Stop Condition, immediately followed by a Repeated Start master read message with Stop.
5.1.4.2 Slave Operations
In addition to performing I2C Bus master operations, the Message Manager can also perform I2C bus slave transmit and receive operations.
5.1.4.2.1Slave Transmit Data
Slave transmit data is entered in the Slave Tx Message Bytes text box control on the main screen. Data in this text box is automatically sent to a requesting master upon receiving a slave transmit request.
Like Master Transmit data, Slave Transmit data is entered with the data editor. To enter data to be transmitted, click on the Slave Tx Message Bytes text box to open the data editor. See “Specifying Master Tx Message Bytes” section for data entry details.
5.1.4.2.2Slave Receive Data
Data bytes received from a Master Transmitter are automatically displayed in the main application screen Received Message window. Received data is displayed in ASCII printable, or hexadecimal (~00 to ~FF) formats. Use the
36
