Powering the SecureIoT1702 Development Board

The SecureIoT1702 is powered directly through the USB micro-B port of the USB-Serial converter (X10). The 5 V input from the USB voltage rail is regulated to 3.3 V by an MCP1755S voltage regulator. A shunt resistor (R30) is provided to allow measurement of the total system power consumption and a jumper (X11) is provided to allow current measurement on the 3.3 V rail.

When operating on USB power only, the total current (sum of 3.3 V + five rail currents) that may be drawn by hardware modules (e.g. CEC1702, mikroBUS™ accessory boards, LCD, and hardware expansion boards) should not exceed 500 mA.

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