Infineon I2C Read Ext Device 1 Manual page 8

Implementation
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Establish I C communication
Data transfer between the external device and the microcontroller is
divided into two steps:
›
Firstly, the microcontroller is transmitting the address of the register, in which
the requested data is stored on the external device (the register containing
the MAC address of MCP79411 is 0xF2). This is done using the
IfxI2c_I2c_write() function.
›
Then, the reading of the MAC address is started with the function
IfxI2c_I2c_read().
Both the write and read functions are defined in the iLLD header IfxI2c_I2c.h.
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