General Call Support

I²C bus allows to transmit data to all I²C slaves simultaneously. This option is called General Call. To make a general call, the I²C master generates the following address: 0000 000 followed by the Write (0) direction bit. The General Call address is one of the reserved addresses and cannot be assigned to any I²C slave device.

When an I²C slave receives the general call address, it can acknowledge it to receive transmitted data or ignore it.

You can configure the I²C slave’s behavior when it receives the general call address:

• If you want your DLN I²C slave port to acknowledge the general call addressing, call the DlnI2cSlaveGeneralCallEnable() function.

• If you want your DLN I²C slave port to ignore the general call addressing, call the DlnI2cSlaveGeneralCallDisable() function.

To check the current configuration of the general call support, use the DlnI2cSlaveGeneralCallIsEnabled() function.