Datasheet

5
Chapter 3.Power Supply
3.1. Requirements
This RDK gets its power from the debugger mini USB connection or optionally from a regulated 5V power supply. The
optional power jack is a center positive connector using a 2.1 mm barrel. An alternate power header is located next to the
power jack (J5).
The RDK PCB can also be loaded with an optional 5.5V super cap (C73), part number EEC-S0HD334H.
Warning: The RDK is neither under nor over-voltage protected. Use a 5V REGULATED center positive supply.
3.2. Power–Up Behavior
When the RDK is purchased it has the Theremin Demo pre-programmed into the Renesas microcontroller. The code
exercises the user LCD, Speaker and Accelerometer on the RDK. The LCD powers up with X and Y axis lines on the
LCD. Switch 3 turns the speaker ON. The program takes samples from the accelerometer and changes the tone
frequency and volume of the speaker as the board is tilted left, right, front, and back. The name of the factory demo
project is “RL78Theremin”.