6. Write: Control Register 1 to enable MST (master mode)
7. Write: Data register with the address of the target slave (the LSB of this byte
determines whether the communication is master receive or transmit)
The routine shown in the following figure encompasses both master and slave I2C
operations. For slave operation, an incoming I2C message that contains the proper
address begins I2C communication. For master operation, communication must be
initiated by writing the Data register.
Chapter 38 Inter-Integrated Circuit (I2C)
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
Freescale Semiconductor, Inc. 717
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