Datasheet

1300 Henley Court

Pullman, WA 99163

509.334.6306

www.digilentinc.com

Pmod8LD™ Reference Manual

Revised January 20, 2016

This manual applies to the Pmod8LD rev. B

DOC#: 502-163

Other product and company names mentioned may be trademarks of their respective owners.

Page 1 of 2

Overview

The Digilent Pmod8LD has eight high-bright LEDs that are driven by logic-level transistors so that each LED can be

individually illuminated from a logic high signal.

1 Functional Description

The Pmod8LD utilizes individual transistors so that each LED can be turned on or off independently. In order to

active an LED, the associated pin on the pin header must receive about 1mA of current.

2 Interfacing with the Pmod

The Pmod8LD communicates with the host board via GPIO pins. Correspondingly, to turn a particular LED on, the

pin must be driven to a logic high state and driven to a logic low state to turn a LED off. With the parallel

arrangement of these LEDs it is possible to turn on (or off) multiple LEDs simultaneously.

A pin description and diagram are provided below.

The Pmod8LD.

 Eight high brightness green LEDs

 BJTs for low-power logic level control

 Small PCB size for flexible designs 1.1 in × 0.8 in (2.8 cm × 2.0

cm)

 2×6-pin Pmod connector with GPIO interface

Features include:

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300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com Pmod8LD™ Reference Manual Revised January 20, 2016 This manual applies to the Pmod8LD rev. B Overview The Digilent Pmod8LD has eight high-bright LEDs that are driven by logic-level transistors so that each LED can be individually illuminated from a logic high signal. Features include:     Eight high brightness green LEDs BJTs for low-power logic level control Small PCB size for flexible designs 1.1 in × 0.8 in (2.8 cm × 2.
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Pmod8LD™ Reference Manual Header J1 Pin Signal Description 1 LD0 LED 0 2 LD1 LED 1 3 LD2 LED 2 4 LD3 LED 3 5 GND Power Supply Ground 6 VCC Power Supply (3.3/5V) P4 7 LD4 LED 4 GND 8 LD5 LED 5 9 LD6 LED 6 10 LD7 LED 7 11 GND Power Supply Ground 12 VCC Power Supply (3.3/5V) P1 P2 J1 Connector P3 Vcc P7 P8 Table 1. Pinout description table. P9 P10 GND Vcc Figure 1. Pmod8LD module circuit diagram.