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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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