4
iCE40 Ultra Breakout Board
Demonstration Design Shunts
Lattice provides the RGB LED Driver Demo design programmed in the board. The RGB LED Driver Demo used in
conjunction with the software GUI illustrates the use of a PWM driver controlling the LEDs on the board. Below is a
description of the control jumpers for each LED.
• The RGB LED will transition colors
— J4 can be used to probe RGB LED (Default shunted). If you remove J4, the RGB LED will not light up.
• The IR LED is controlled when a shunt is placed across J50 pins 1-2
• The Bar Code LED is controlled when a shunt is placed across J29 pins 2-3 (Default shunted)
Figure 2 shows the default board shunt locations.
Figure 2. Default Shunt Locations
J3 - Enable DONE LED
J9 – Isolate
SPI Flash CSn
J50 – Selects
-
HP LED device
(IR or Torch)
J51 – Enable
-
12 MHz clock
J4 –
- RGB
Shunts
J10 – Program
SPI Flash or iCE5LP
