Texas Instruments 28xxx, TMS320x28xx manual Table A-1. Changes for Revision D

Page 117

Appendix A

SPRU791D–November 2004–Revised October 2007

Revision History

This document was revised to SPRU791D from SPRU791C. The scope of the revision was limited to technical changes as shown in Table A-1.

 

Table A-1. Changes for Revision D

 

 

Location

Modifications, Additions, and Deletions

 

 

Figure 2-12

Modified the Detailed View of the Counter-compare Submodule figure

 

 

Section 2.2.3

Corrected register name from TBCTRL to TBCTL in the second paragraph of calculating PWM Period and

 

Frequency

 

 

Figure 2-2

Modified figure

 

 

Figure 2-13

Modified the Counter-compare Event Waveforms in Up-count Mode figure and the Counter-compare

 

 

Events in Down-count Mode figure

 

 

Figure 2-5

Modified figure

 

 

Figure 2-6

Added new figure for synchronization scheme 3

 

 

Figure 2-12

Modified figure

 

 

Figure 2-18

Modified figure

 

 

Table 2-7

Corrected register name from AQCSF to AQCSFRC in the paragraph following the Action-qualifier

 

 

submodule Possible Input Events

 

 

Section 2.4.3

Corrected register name from TBCNTR to TBCTR in first paragraph and the Acton-qualifier Event Priority

 

table

 

 

Figure 2-21

Modified figure

 

 

Figure 2-22

Modified figure

 

 

Figure 2-23

Modified figure

 

 

Figure 2-25

Modified figure

 

 

Figure 2-26

Modified figure

 

 

Section 2.6.3

Corrected register name from CHPCTL to PCCTL in the first paragraph of the section on operational

 

 

highlights for the PWM-chopper Submodule

 

 

Figure 2-31

Modified figure

 

 

Figure 2-36

Modified figure

 

 

Figure 2-37

Modified figure

 

 

Table 4-24

Modified the descriptive name of the Event-Trigger Prescale Register INTPRD field

 

 

Figure 2-41

Corrected bit name ESOOCA to SOCAEN in the paragraph following the Event-trigger Interrupt Generator

 

figure

 

 

Figure 2-42

Modified figure

 

 

Figure 2-43

Modified figure

 

 

Table 4-2

Modified the description of the Time-base Phase Register TBPHS field

 

 

Figure 4-4

Modified the reset value of the CTRMODE field in the Time-Base Control Register (TBCTL) figure

 

Table 4-4

Modified the bit description of SYNCOSEL in the TBCTL register field descriptions

 

 

Table 4-5

Modified two field descriptions in the TBSTS register field descriptions table

 

 

Figure 4-6

Corrected the CMPA Register figure, changing 7 to 15

 

 

Table 4-7

Modified descriptions in CMPB Field Descriptions table

 

 

Table 4-11

Changed AQCSF to AQCSFRC in the AQSFRC field descriptions table

 

 

Table 4-12

Modified description of CSFB field in the AQCSFRC field descriptions table

 

 

SPRU791D–November 2004–Revised October 2007

Revision History

117

Submit Documentation Feedback

 

 

Image 117
Contents Reference Guide Submit Documentation Feedback Contents Controlling a 3-Phase Interleaved DC/DC Converter List of Figures Event-Trigger Socb Pulse Generator Simplified ePWM Module List of Tables Submit Documentation Feedback Data Manuals Related Documentation From Texas InstrumentsCPU Users Guides Peripheral GuidesApplication Reports Tools GuidesTMS320C28x, C28x are trademarks of Texas Instruments TrademarksSubmit Documentation Feedback Introduction Submodule Overview IntroductionMultiple ePWM Modules ∙ Trip-zone signals TZ1 to TZ6 ∙ PWM output signals EPWMxA and EPWMxB∙ ADC start-of-conversion signals EPWMxSOCA and EPWMxSOCB ∙ Peripheral BusRegister Mapping EPWM Submodules and Critical Internal Signal InterconnectsDescription Offset Size NameTime-Base Submodule Registers Counter-Compare Submodule RegistersEPWM Submodules Submodule Configuration Parameters Submodule Configuration Parameter or OptionOverview Tbup Example 2-1. Constant Definitions Used in the Code ExamplesChpenable Purpose of the Time-Base Submodule Time-Base TB SubmoduleControlling and Monitoring the Time-base Submodule Time-Base Submodule RegistersRegister ∙ Up-Down-Count Mode Key Time-Base Signals∙ Up-Count Mode ∙ Down-Count Mode∙ Time-Base Period Immediate Load Mode ∙ Time-Base Period Shadow ModeTime-Base Period Shadow Register ∙ Active RegisterTime-Base Counter Synchronization Scheme Time-Base Counter SynchronizationEPWM11SYNCO EPWM11SYNCI∙ Software Forced Synchronization Pulse ∙ EPWMxSYNCI Synchronization Input PulseTime-base Counter Modes and Timing Waveforms Phase Locking the Time-Base Clocks of Multiple ePWM ModulesTime-Base Down-Count Mode Waveforms 11. Counter-Compare Submodule Counter-Compare CC SubmoduleControlling and Monitoring the Counter-Compare Submodule Purpose of the Counter-Compare SubmoduleCounter-Compare Submodule Registers Register Name Address OffsetCounter-Compare Submodule Key Signals Count Mode Timing Waveforms∙ Shadow Mode ∙ Immediate Load ModeCTR=CMPB CTR=CMPACTR = Cmpb Action-Qualifier AQ Submodule Purpose of the Action-Qualifier SubmoduleAction-Qualifier Submodule Registers ∙ Set High Action-Qualifier Submodule Possible Input Events∙ Clear Low ∙ ToggleTB Counter equals Actions Action-Qualifier Event Priority for Up-Count Mode Action-Qualifier Event Priority for Up-Down-Count Mode10. Action-Qualifier Event Priority for Down-Count Mode Action-Qualifier Event PriorityUse up-down-count mode to generate a symmetric PWM Waveforms for Common ConfigurationsUse up-down-count mode to generate an asymmetric PWM When using up-count mode to generate an asymmetric PWM20. Up-Down-Count Mode Symmetrical Waveform Tbctr Example 2-2. Code Sample for FigureValue EPWMxA EPWMxB Tbclk = Sysclkout Example 2-3. Code Sample for FigureEdgePosA Example 2-4. Code Sample for FigureExample 2-5. Code Sample for Figure Tbctr Example 2-6. Code Sample for FigureEPWMxA EPWMxB Example 2-7. Code Sample for FigurePurpose of the Dead-Band Submodule Dead-Band Generator DB SubmoduleControlling and Monitoring the Dead-Band Submodule 12. Dead-Band Generator Submodule RegistersOperational Highlights for the Dead-Band Submodule ∙ Output Mode Control∙ Input Source Selection ∙ Polarity Control13. Classical Dead-Band Operating Modes Mode Description29. Dead-Band Waveforms for Typical Cases 0% Duty 100% FED = Dbfed × Ttbclk RED = Dbred × Ttbclk Dead-Band Delay in μSPurpose of the PWM-Chopper Submodule PWM-Chopper PC SubmoduleControlling the PWM-Chopper Submodule Operational Highlights for the PWM-Chopper Submodule31. PWM-Chopper Submodule Operational Details WaveformsOne-Shot Pulse 16. Possible Pulse Width Values for Sysclkout = 100 MHzOSHTWTHz Period Duty Cycle ControlPurpose of the Trip-Zone Submodule Trip-Zone TZ SubmoduleOperational Highlights for the Trip-Zone Submodule Controlling and Monitoring the Trip-Zone Submodule17. Trip-Zone Submodule Registers ∙ Cycle-by-Cycle CBC18. Possible Actions On a Trip Event Example 2-8. Trip-Zone ConfigurationsScenario a Scenario BGenerating Trip Event Interrupts 36. Trip-Zone Submodule Mode Control Logic37. Trip-Zone Submodule Interrupt Logic Event-Trigger ET SubmoduleOperational Overview of the Event-Trigger Submodule CTR=CMPB CTRD=CMPB 19. Event-Trigger Submodule Registers41. Event-Trigger Interrupt Generator 42. Event-Trigger Soca Pulse Generator Submit Documentation Feedback Controlling Multiple Buck Converters With Independent Applications to Power TopologiesOverview of Multiple Modules Key Configuration CapabilitiesCTR=0 EPWM1B CTR=CMPB Control of Four Buck Stages. Here FPWM1≠ FPWM2≠ FPWM3≠ FPWM4 Buck Waveforms for -3Note Only three bucks shown here 500 Example 3-1. Configuration for Example in FigureControl of Four Buck Stages. Note FPWM2 = N x FPWM1 Controlling Multiple Buck Converters With Same FrequenciesBuck Waveforms for -5Note FPWM2 = FPWM1 Example 3-2. Code Snippet for Configuration in Figure Control of Two Half-H Bridge Stages FPWM2 = N x FPWM1 Controlling Multiple Half H-Bridge HHB ConvertersHalf-H Bridge Waveforms for -7Note Here FPWM2 = FPWM1 Example 3-3. Code Snippet for Configuration in Figure Controlling Dual 3-Phase Inverters for Motors ACI and PmsmEPWM1A 10 -Phase Inverter Waveforms for -9Only One Inverter Shown Example 3-4. Code Snippet for Configuration in Figure 11. Configuring Two PWM Modules for Phase Control Controlling a 3-Phase Interleaved DC/DC Converter Controlling a 3-Phase Interleaved DC/DC Converter13. Control of a 3-Phase Interleaved DC/DC Converter 14 -Phase Interleaved DC/DC Converter Waveforms for Figure Example 3-5. Code Snippet for Configuration in Figure 15. Controlling a Full-H Bridge Stage FPWM2 = FPWM1 16. ZVS Full-H Bridge Waveforms Example 3-6. Code Snippet for Configuration in Figure Submit Documentation Feedback Proper Interrupt Initialization Procedure PWM-Chopper Submodule Control RegisterTrip-Zone Submodule Control and Status Registers Time-Base Submodule Registers Time-Base Phase Register Tbphs Field DescriptionsTime-Base Period Register Tbprd Field Descriptions Time-Base Counter Register Tbctr Field DescriptionsBit Field Value Description Time-Base Control Register Tbctl Field DescriptionsSoftware Forced Synchronization Pulse Counter-Compare Submodule Registers Time-Base Status Register Tbsts Field DescriptionsBit Field Counter-Compare a Register Cmpa Field Descriptions Counter-Compare B Register Cmpb Field DescriptionsBits Name Description Counter-Compare Control Register Cmpctl Field Descriptions Action-Qualifier Submodule RegistersCBD CBU CAD CAU PRD ZRO Bits NameCBD 10. Action-Qualifier Output B Control Register Aqctlb Rldcsf Otsfb Actsfb Otsfa Actsfa RldcsfCsfb Csfa Dead-Band Submodule Registers CsfbInmode Polsel Outmode Inmode 16. PWM-Chopper Control Register Pcctl Bit Descriptions PWM-Chopper Submodule Control RegisterName Value Description ReservedTrip-Zone Submodule Control and Status Registers PWM-Chopper Control Register Pcctl Bit DescriptionsChpduty CBC6 CBC5 CBC4 CBC3 CBC2 CBC1 OSHT6 OSHT5 OSHT4 OSHT3 OSHT2 OSHT1OSHT6 CBC6TZB TZA 18. Trip-Zone Control Register Tzctl Field DescriptionsTZB OST CBCOST CBC INT 20. Trip-Zone Flag Register Tzflg Field DescriptionsEvent-Trigger Submodule Registers 21. Trip-Zone Clear Register Tzclr Field Descriptions22. Trip-Zone Force Register Tzfrc Field Descriptions 23. Event-Trigger Selection Register Etsel Name Description 24. Event-Trigger Prescale Register Etps Field DescriptionsSocb Soca 24. Event-Trigger Prescale Register Etps Field Descriptions 25. Event-Trigger Flag Register Etflg Field Descriptions 26. Event-Trigger Clear Register Etclr Field Descriptions Socb 27. Event-Trigger Force Register Etfrc Field Descriptions Proper Interrupt Initialization Procedure116 Location Modifications, Additions, and Deletions Table A-1. Changes for Revision DAppendix a Important Notice