NB2DSK01 - User LEDs

The NB2DSK01 provides a bank of eight Green LEDs, labeled 'USER LEDS'. Each LED is wired to, and driven from, a separate I/O pin of the daughter board FPGA device. The LEDs provide a visual output for signals in an FPGA design.

The LED signals are active High – outputting a '1' on one of these lines will illuminate the corresponding LED.

Location on Board

The LEDs (designated LED9-LED16 and labeled '0' to '7' respectively) are located on the component side of the board, to the immediate left of the 8-way DIP-switch.

LED16 (labeled '7') is in the left-most position.

Schematic Reference

The LED circuitry can be found on Sheet 55 (LED_GREEN_0603x8.SchDoc, entitled 8-Way 0603 Green LED Array) of the motherboard schematics.

Design Interface Component

Table 1 summarizes the available design interface component that can be placed from the FPGA NB2DSK01 Port-Plugin.IntLib, to access the User LEDs.

Although the eight signals leave the daughter board FPGA device on separate pins, the interface component requires an 8-bit bus input. Connection to the component's bus port depends on where in the design these signals are sourced. If, for example, you wish to monitor port output from an 8-bit wide port peripheral, you would wire directly from that port output to the LED interface component.

If, for example, you wanted to monitor 8 bits from a 32-bit data output, or if you wanted to bring single signals together from various device outputs, you would need to use an appropriate bus joiner device.

For more information on the available bus joiner components available for use in an FPGA design, see the Functional Classes - Bus Joiner section of the FPGA Generic Library Guide.