Manuals / Freescale Semiconductor / Computer Equipment / Network Card

Freescale Semiconductor MC68HC908QT2 Operational Description, Introduction, Push Buttons, LEDs

Models: M68HC08

1 30

Download 30 pages 41.27 Kb

Page 11

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Designer Reference Manual — DRM045

Section 2. Operational Description

2.1 Introduction

The following subsections describe the operation of the ASB520, MC68HC908QT2 infrared remote control reference design system. LEDs, switches, jumper blocks and FLASH programmer headers, and current monitor jumper block are described here. Figure 2-1shows the locations of these items.

2.2 Push Buttons

There are six push button switches resident on the lower portion of the reference PC board. They are labeled as switches SW1–SW6 on the PC board schematic. Each button has a dedicated function. The switches are labeled as POWER, PAUSE, PLAY, REVERSE, STOP, and FORWARD. These labels describe the button’s operation function related to control of a DVD player.

2.3 LEDs

There are two LEDs located in the upper right hand corner of the PC board. The LED labeled D1 is an infrared LED and the one labeled D2 is a visible red LED and is used to show system activity.

2.3.1 Red Activity Indicator LED

D2 is a visible red LED and is used to show IR LED activity. It blinks as long any push button is depressed

2.3.2 Infrared LED

D1 is an infrared LED. It is modulated to control the DVD.

Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board		DRM045

MOTOROLA	Operational Description	11
	For More Information On This Product,
	Go to: www.freescale.com

Image 11

Freescale Semiconductor MC68HC908QT2 Operational Description, Introduction, Push Buttons, LEDs, Red Activity Indicator LED

Contents

Remote Control Reference PC Board Freescale Semiconductor, IncFreescale Semiconductor, Inc Using the ASB520 MC68HC908QT2 Based InfraredFor More Information On This Product Freescale Semiconductor, IncFreescale Semiconductor, Inc Freescale Semiconductor, Inc Reference DesignUsing the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC BoardFreescale Semiconductor, Inc Revision HistoryRevision History Freescale Semiconductor, IncSection 6. System Testing Table of ContentsSection 1. Introduction and Setup Section 4. Schematic and Parts ListDRM045 Table of ContentsFreescale Semiconductor, Inc Freescale Semiconductor, IncFreescale Semiconductor, Inc Section 1. Introduction and Setup1.1 Introduction 1.2 About this ManualFreescale Semiconductor, Inc Introduction and Setup1.3 Setup Guide Freescale Semiconductor, IncFreescale Semiconductor, Inc Introduction and Setup Setup GuideIntroduction and Setup Freescale Semiconductor, IncDRM045 Introduction and SetupFreescale Semiconductor, Inc Freescale Semiconductor, Inc2.2 Push Buttons 2.3.1 Red Activity Indicator LEDSection 2. Operational Description 2.1 IntroductionJP1 JP2 JP3 JP4 Operational DescriptionFigure 2-1.PC Board Freescale Semiconductor, IncFreescale Semiconductor, Inc 2.4 Header and Jumpers BlocksFreescale Semiconductor, Inc Operational Description 2.5 Microcontroller Current Monitor Jumper BlockFreescale Semiconductor, Inc Freescale Semiconductor, IncTable 3-1.MON08 Pin Assignments 3.2 16-PinConnector J1Section 3. Pin Description 3.1 IntroductionDRM045 Pin DescriptionFreescale Semiconductor, Inc Freescale Semiconductor, IncFreescale Semiconductor, Inc Section 4. Schematic and Parts List4.2 Schematic 4.1 IntroductionFigure 4-1.ASB520 PC Schematic and Parts ListBoard Schematic Semiconductor, IncFreescale Semiconductor, Inc 4.3 Parts ListTable 4-1.Reference PC Board Parts List Schematic and Parts List Parts ListDRM045 Schematic and Parts ListFreescale Semiconductor, Inc Freescale Semiconductor, Inc5.2 Grounding FreescaleSection 5. Design Considerations 5.1 IntroductionFreescale Semiconductor, Inc 5.4 Switch CircuitryFigure 5-2.Switch Circuitry Design ConsiderationsFreescale Semiconductor, Inc Table 5-1.Switch Input A/D ValuesDesign Considerations Switch Circuitry SwitchDRM045 Freescale Semiconductor, IncFreescale Semiconductor, Inc Design Considerations6.3FLASH Programming Section 6. System Testing6.2 Hardware/Software Testing Summary 6.1 IntroductionFreescale Semiconductor, Inc System Testing6.4 LED and Push Button Test Code Freescale Semiconductor, IncFreescale Semiconductor, Inc 6.5 DVD Player Control TestFreescale Semiconductor, Inc Freescale Semiconductor, Inc System TestingSystem Testing Freescale Semiconductor, IncFor More Information On This Product Freescale Semiconductor, IncFreescale Semiconductor, Inc For More Information On This Product HOW TO REACH USFreescale Semiconductor, Inc Freescale Semiconductor, Inc