User manual

Display Expansion Board - User’s Guide

Page 8

Figure 1 – Display Expansion Board and OEM Base Board Mounting

3.3 Power Consumption

The board needs both a +3.3V and +5V supply. +5V is needed for the all the interfaces.

If the OEM Base Board is used to power the Display Expansion Board and the OEM Base Board is

powered via a USB Host port, the current consumption is close to what many USB Host ports can

supply. In many cases it will work just fine, but sometimes an external +5V/1A supply is needed.

Note that if an external LCD panel is supplied via the LVDS interface the power consumption can be

considerably higher than 1A. A +5V/2-3A supply might be needed in that case.