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TE0703-06 has a Lattice LCMXO2-1200HC as a system controller. for further function description see Firmware TE0703 CPLD - CC703S#CC703S,

SD IO Levelshifter

SD IO levelshifter (U2) is used in congntion with jumper J11 to select the correct SD IO interface voltage of the SoM. 

I²C Repeater

For power squenz reasons the I²C bus is routed via a repater (U7) to to ensure no IOs of the SoM are driven before M3.3VOUT is up.

LEDs

There are four on-board LEDs. D3 and D4 are  connected to the B2B connector JB2 pins FLED1 and FLED2 respectively and can be read by CPLD firmware. See TE0703 CPLD - CC703S#CC703S-LED.

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