If installed, jumpers J3 and J4
can disable the DUT and level shifter respectively; J3 and J4 must be removed
for these devices to work properly.
Jumpers J8, J9, and J10 enable
the LED indicators to show if power is correctly supplied to the board. LED
indicators lead to an increase in supply current.
SDA and SCL lines are supplied
through either the on-board headers or multipurpose test-points. Keep in mind
that SCL_1 and SDA_1 can be driven by the level shifter; however, the user can
directly supply these signals directly and disable the level shifter.