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Freescale Semiconductor M68HC08 Definitions of Constants and Variables, 5.5.3 I/O Usage, I/O pin

Models: M68HC08

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5.5.3 I/O Usage

Software Design

5.5.3 I/O Usage

Table 5-2summarizes the use of the I/O pins.

						Table 5-2. I/O Usage

I/O pin					Direction				Purpose

PTC0/OSC1					INPUT				OSC1(EXTERNAL OSCILLATOR IN MONITOR MODE)

PTC1/OSC2					-				UNUSED

									(MAINS ZERO CROSSING DETECTION/		IN MONITOR
								IRQ		IRQ
PTC2/SHTDWN/IRQ					INPUT			IRQ		IRQ
PTC2/SHTDWN/IRQ					INPUT				MODE)
									MODE)

PTB0/TOP					OUTPUT				TOP (HRP OUTPUT)

PTB1/BOT					OUTPUT				BOT (HRP OUTPUT)

PTB2/FAULT					-				UNUSED

PTB3/PWM0					OUTPUT				PWM0 (REFERENCE SINUS WAVE GENERATING)

PTB4/PWM1					OUTPUT			SWITCHING PFC TRANSISTOR ONLY IN DCM HW VARIATION

PTB5/V+					INPUT				V+ (COMPARATOR INPUT)

PTB6/V-					INPUT				V- (COMPARATOR INPUT)

PTB7/VOUT/ADC6/FAULT					OUTPUT			VOUT (COMPARATOR OUTPUT) AND MOREOVER AS PWM
PTB7/VOUT/ADC6/FAULT					OUTPUT				FAULT PIN IN DCM HW VARIATION
									FAULT PIN IN DCM HW VARIATION

PTA0/ADC0/KBI0					INPUT/OUTPUT			PTA0 (COMMUNICATION PIN IN MONITOR MODE AND FOR
PTA0/ADC0/KBI0					INPUT/OUTPUT				SERIAL BOOTLOADER PROGRAMMING)
									SERIAL BOOTLOADER PROGRAMMING)

PTA1/ADC1/KBI1					INPUT			ADC1 (LUMINANCE LEVEL /PTA1 IN MONITOR MODE)

PTA2/ADC2/KBI2					INPUT				ADC2 (DC-BUS VOLTAGE)

PTA3/ADC3/KBI3					INPUT				ADC3 (TUBE CURRENT 1)

PTA4/ADC4/KBI4					INPUT				ADC4 (TUBE CURRENT 1

					OUTPUT				PTA5 (USER LED)
PTA5/RST/KBI5					OUTPUT				PTA5 (USER LED)

PTA6/ADC5/TCH0/KBI6					INPUT				ADC5 (TUBE VOLTAGE DIFFERENCE

The installation CodeWarrior Version 3 Service Pack for LB8 is part of the Emulation Board software. This includes examples of how to tune and work with the HRP.

5.6 Definitions of Constants and Variables

This section provides definitions of the constants and variables used in the program. The definitions can be divided into two parts:

•System setup definitions

•System constants and variables

Dimmable Light Ballast with Power Factor Correction, Rev. 1

52	Freescale Semiconductor

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Freescale Semiconductor M68HC08 Definitions of Constants and Variables, 5.5.3 I/O Usage, Software Design, I/O pin, Purpose

Contents

M68HC08 Microcontrollers Designer Reference ManualDRM067 Rev. 1 12/2005 Page Designer Reference Manual Draft 2 for Review Freescale SemiconductorContents Chapter Introduction Chapter Control TheoryChapter Reference Design Chapter Hardware DesignChapter Demo Setup Appendix A. Schematics and Part ListChapter Software Design Appendix B. ReferencesChapter Introduction 1.2 Benefits of this Solution1.1 Introduction 1.3 The MC68HC908LB8 Microcontroller 7-bitkeyboard interrupt Introduction Freescale SemiconductorChapter Control Theory 2.1 Introduction2.1.1 Fluorescent Lamp Control Theory 2.1.2 Fluorescent Lamp OperationGas filling mixture 2.1.3 Controlling the Fluorescent Lamp Freescale SemiconductorFreescale Semiconductor 2.2PFC Control Theory 2.2.1 IntroductionFreescale Semiconductor Freescale Semiconductor MCU PWM PWM1 FAULT PIN Control TheoryDC Bus Voltage Zero2.2.4 Concept Summary Figure 2-8.Generated Input Current WaveformControl Theory Freescale SemiconductorChapter Reference Design 3.2 Dimmable Light Ballast Characteristics3.1 Application Outline 3.3 Application Description Table 3-1.Light Ballast Characteristics3.3.2 Power Factor Correction 3.3.1 Light Ballast ControlCONTROL BOARD MC68HC908LB83.5 Hardware Specification 3.4 Software Specification3.3.3 Protection Features 4.1 Hardware Implementation Chapter Hardware Design4.2 System Modules 4.2.1 Input and PFC Hardware DesignFigure 4-3.Dimmable Light Ballast - Input and PFC 4.2.2 Inverter Freescale SemiconductorFigure 4-4.Dimmable Light Ballast - Inverter System ModulesFreescale Semiconductor HALF BRIDGE4.2.3 Microcontroller Signal System ModulesPin number TOP BOT Comp Comp Out Zero DetectSignal Table 4-2.J2 Interface HeaderHardware Design Pin numberFigure 4-6.Dimmable Light Ballast - Power Supply 4.2.4 Power SupplyTable 4-3.Supplied Voltages Hardware Design Freescale Semiconductor5.1 Introduction Chapter Software Design5.2 Control Algorithm Description 5.2.1 Power Factor Correction Control 5.2.1.2 Phase Shift Synchronization5.2.1.4 Generation of Output PFC Control SIgnal 5.2.1.1 DC-busVoltage Control5.2.2.1 Tube Start Mode 5.2.2 Light Ballast Control5.2.2.2 Luminance Level Control Tube Run Mode q = itADmin - A ⋅ ek ⋅ ADmin ireq = A ⋅ ek ⋅ ireqAD + qrounditmin ⋅ ADmax ⁄ imax rounditmax ⋅ ADmax ⁄ imax5.3.1 Initialization Setup 5.3 Software Implementation5.3.1.1 PWM Setup 5.3.1.2 HRP Setup PWM Frequency =BusFrequency Hz Hz5.3.2 Main Program Loop 5.3.4 Sine Wave Generation Interrupt Routine 5.3.3 Synchronization Interrupt RoutineFreescale Semiconductor Set 1ms flag and reset 1ms counter Software Designinterrupt void pwmISRvoid Read new PWM value from table * sineGain5.3.4.1 Fault Detection and Processing 5.4 Detailed Software Description Figure 5-6.Flow Chart - timovISR and faultISRSoftware Design Stop HRPFigure 5-7.Flow Chart - Main Flow, Part Detailed Software DescriptionSoftware Design Figure 5-8.Flow Chart - Main Flow, PartFreescale Semiconductor Detailed Software Description Figure 5-9.Flow Chart - Main Flow, PartFreescale Semiconductor Software Design Figure 5-10.Flow Chart - Main Flow, PartFreescale Semiconductor 5.5.1.1 High Resolution PWM HRP 5.5.1.4 Timer Interface Module TIM5.5 Microcontroller Usage 5.5.1 Microcontroller Peripheral Usage5.6 Definitions of Constants and Variables 5.5.3 I/O UsageSoftware Design I/O pin5.6.1 System Setup Definitions defines the minimum HRP frequency in kHz 5.6.2 System Constants and Variables Page Chapter Demo Setup 6.1 Hardware Setup6.2 Software Setup 6.2.1 Required Software Tools6.2.3 Executing the Application 6.2.4 Project Files\prm\P&E FCS linker.prm, linker program file \Sources\pi controller.c, PI regulators fileAppendix A. Schematics and Part List A.1 Schematics2.7mH PFC Current SenseComp PFC GatePFC Current Sense CompPFC Gate Zero DetectFigure A-3.Inverter DCB TOP BOTO1 O2 O3 O4 O5 O6 O7 O8 COM LOTOP BOT Comp - Comp Out Zero Detect Serial DataSerial Data DCB Divider Tube Current Tube Current Tube Voltage differenceGND Serial Data5Serial Data DCB Divider Tube Current Tube Current Tube Voltage differenceFigure A-6.Power supply A.2 Parts List DESIGNATORSQUANTITY DESCRIPTIONDESIGNATORS QUANTITYDESCRIPTION MANUFACTURERFreescale Semiconductor Appendix B. References Freescale Semiconductor Page How to Reach Us Home PageE-mail USA/Europe or Locations Not Listed