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RD1103

更新时间： 2024-09-28 14:58:19

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LED/OLED Driver - Documentation

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LED/OLED Driver

March 2014

Reference Design RD1103

Introduction

A Light Emitting Diode (LED) is a semiconductor light source mainly used in signalling and lighting applications. A

LED consists of anode and cathode nodes. When current is applied in a forward direction, the LED emits light. The

Organic LED (OLED) is the latest development in the field of LED technology. It is a special type of LED which has

a layer of organic compound. The advantage of the LED is its efficiency. It occupies a small area, consumes less

power and lasts for a long duration.

In recent years there has been a surge in demand for LEDs and this translates into a rise in demand for LED con-

trollers. PLDs and FPGAs offer an ideal solution for LED controllers as they can be easily programmed and repro-

grammed for different functions. Thus a PLD and FPGA implementation for a LED controller helps designers make

efficient use of LEDs.

The WISHBONE Bus interface is a free, open-source standard that is gaining popularity in digital systems that

require the use of IP cores. This bus interface encourages IP reuse by defining a common interface among IP

cores. That, in turn, provides portability for the system, speeds time to market, and reduces the cost of the end

product.

This reference design is targeted for a LED controller to drive a GM1WA55311A LED device from Sharp Electron-

ics. A typical application of this design includes the interface between a WISHBONE-compliant, on-board micro-

controller and a LED device. This design can also be used as a reference to control other LEDs or OLEDs for

similar functions.

Features

The LED/OLED Driver reference design provides a bridge between the microcontroller and the LED device via a

WISHBONE bus. The microcontroller programs the duty cycle for the red, green and blue LEDs. Below is a sum-

mary of the functionalities.

• Supports red, green and blue LEDs

• Programmable duty cycle range of 0-100%

• WISHBONE Classic Interface Revision B compliant

• A non-WISHBONE compatible signal, rst_i, is an asynchronous reset signal provided for PLD or FPGA imple-

mentations

Functional Description

This design consists of three programmable registers for programming the duty cycle for the three LEDs (RGB).

These registers are programmed by the microcontroller using a WISHBONE interface.

Table 1 lists the I/O ports of the design. The signals ending in “_i” indicate an input and those ending in “_o” indi-

cate an output for WISHBONE interface.

or product names are trademarks or registered trademarks of their respective holders. The specifications and information herein are subject to change without notice.

www.latticesemi.com

rd1103_01.1

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与RD1103相关器件

型号	品牌	获取价格	描述	数据表
RD110E	NEC	获取价格	500 mW DHD ZENER DIODE DO-35
RD110EB	RENESAS	获取价格	110V, 0.5W, SILICON, UNIDIRECTIONAL VOLTAGE REGULATOR DIODE, DO-35, GLASS PACKAGE-2
RD110EB	NEC	获取价格	500 mW DHD ZENER DIODE DO-35
RD110EB	SEMTECH	获取价格	ZENER DIODES
RD110EB1	NEC	获取价格	500 mW DHD ZENER DIODE DO-35
RD110EB2	NEC	获取价格	500 mW DHD ZENER DIODE DO-35
RD110EB3	NEC	获取价格	500 mW DHD ZENER DIODE DO-35
RD110EB4	NEC	获取价格	500 mW DHD ZENER DIODE DO-35
RD110EB5	NEC	获取价格	500 mW DHD ZENER DIODE DO-35
RD110EB6	NEC	获取价格	500 mW DHD ZENER DIODE DO-35

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