UM_INAP375R Revision 1.2_A1 Inova Semiconductors Confidential Page 6 of 37
User Manual
Figure 2-3: APIX2 ADK Transmitter control path
The microcontroller offers two independent I2C busses as well as one SPI bus. The I2S busses manage EDID
information and control functions of both HDMI/DVI devices as well as control functions of the audio analog to
digital converter. The SPI bus manages configuration of the INAP375T Transmitter device and the settings of
the audio frame rate converter.
The setting of the bootstrap pins of the INAP375T device (for more information please refer to the data sheet)
can be controlled by an I/O extender which is accessible via I2C-1 (see chapter 2).
The microcontroller‘s connections to the INAP375T device can be tri-stated via dip switch (see chapter 3.3).
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