mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 1052

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Initialization/Application Information
The routine shown in the following figure can handle 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.
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1. Write: Frequency Divider register to set the I2C baud rate (example provided in this
2. Write: Control Register 1 to enable the I2C module and interrupts
3. Initialize RAM variables (IICEN = 1 and IICIE = 1) for transmit data
4. Initialize RAM variables used to achieve the routine shown in the following figure
5. Write: Control Register 1 to enable TX
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
chapter)
determines whether the communication is master receive or transmit)
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Preliminary
Freescale Semiconductor, Inc.