Video Display Mode Selection | Texas Instruments TMS320DM648

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Video Display Mode Selection

4.1Video Display Mode Selection

The video display module operates in one of three modes as listed in Table 4-1. The DMODE bits are in the video display control register (VDCTL). The Y/C and 16-bit raw display modes may only be selected if the DCDIS bit in the video port control register (VPCTL) is cleared to 0.

Table 4-1. Video Display Mode Selection

DMODE Bits	Mode	Description
000	8-Bit ITU-R BT.656 Display	Digital video output is in YCbCr 4:2:2 with 8-bit resolution multiplexed in ITU-R
		BT.656 format.
010	8-Bit Raw Display	8-bit data output
100	8-Bit Y/C Display	Digital video is output in YCbCr 4:2:2 with 8-bit resolution on parallel Y and
		Cb/Cr multiplexed channels.
110	16-Bit Raw Display	16-bit data output.

4.1.1 Image Timing

Display devices generate interlaced images by controlling the vertical retrace timing. The video display module emits a data stream used to generate a displayed image. An NTSC-compatible interlaced image with field and line information is shown in Figure 4-1. A progressive-scan image (SMPTE 296M compatible) is shown in Figure 4-2.

The active video area represents the pixels visible on the display. The active video area begins after the horizontal and vertical blanking intervals. The image area output by the video display module can be a subset of the active area. The relationship between frame, active video area, and image area is presented in Figure 4-3for interlaced video and in Figure 4-4for progressive video. The video display module generates timing for frames, active video areas within frames, and images within the active video area.

Figure 4-1. NTSC Compatible Interlaced Display

Field 1

Line 20

Line 21

Line 22

Line 261

Line 262

Line 263

Field 2

Line 282

Line 283

Line 284

Line 523

Line 524

Line 525

SPRUEM1 –May 2007

Video Display Port

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Texas Instruments TMS320DM648 manual Video Display Mode Selection, Image Timing, Dmode Bits Mode Description

Contents

Users Guide Submit Documentation Feedback Contents Raw Data Capture Mode BT.656 Image Display Video Display Registers Recommended Values Operational Details List of Figures Bit BT.656 Fifo Unpacking Video Display Event Register Vddispevt List of Tables Video Display Register Recommended Values About This Manual Notational ConventionsRelated Documentation From Texas Instruments Related Documentation From Texas Instruments Trademarks Overview Video Port Video Port Block Diagram Edma Interface Video Port Fifo BT.656 Video Capture Fifo Configuration Video Capture Fifo Configurations Ysrca Y/C Video Capture Fifo Configuration Bit Raw Video Capture Fifo Configuration Video Display Fifo Configurations Bit Locked Raw Video Display Fifo Configuration Video Port Registers 10. Y/C Video Display Fifo Configuration Video Capture Signal Mapping1 Video Display Signal MappingVideo Port Pin Mapping Capture Mode BT.656 Raw Data Data Bus Bit Vdin Bus Usage for Capture ModesVdin Data Bus Usage for Capture Modes1 Video Port Pin Multiplexing Vdout Data Bus Usage for Display ModesVideoPort Clocking Vdout Data Bus Usage for Display Modes1 Video Port Power-On Reset Reset OperationPeripheral Bus Reset Software Port Reset Capture Channel Reset Display Channel ResetInterrupt Operation Capture Edma Event Generation Edma Operation Edma Size and Threshold Restrictions Display Edma Event Generation Video Port Control Registers Edma Interface OperationVideo Port Control Registers Acronym Register Name Video Port Control Register Vpctl Video Port Control Register Vpctl Field DescriptionsDescription Operating Mode Video Port Operating Mode Selection Video Port Status Register Vpstat Field Descriptions Video Port Status Register Vpstat Video Port Interrupt Enable Register Vpie Lfda Dcna Lfda Sfda VINTA2 VINTA1 Serra Ccmpa Covra Video Port Interrupt Status Register Vpis Video Port Interrupt Status Register Vpis Field Descriptions Vdctl None Clear Short field detected on channel a interrupt detected bit Covra Video Capture Port BT.656 and Y/C Mode Field and Frame Operation BT.656 Video Capture Mode Video Capture Mode SelectionVideo Capture Mode Selection 1 BT.656 Capture Channels BT.656 Protection Bits Error Correction by Protection Bits Video Capture Parameters 3 BT.656 Image Window and Capture 5 BT.656 Fifo Packing 4 BT.656 Data SamplingCommon Video Source Parameters Video Source 1 Y/C Capture Channels Y/C Video Capture Mode2 Y/C Timing Reference Codes 3 Y/C Image Window and Capture 4 Y/C Fifo Packing BT.656 and Y/C Mode Field and Frame OperationBit Y/C Fifo Packing Vclkina Capture Determination and Notification BT.656 and Y/C Mode Capture OperationVC xCTL Bit Operation Vertical Synchronization Vertical Counter Reset PointVertical Synchronization Programming EAV VRST=0 VRST=1 FINV=0 FINV=1 Vcount Vcount Operation Example EXC = Horizontal Synchronization Horizontal Counter Reset PointHorizontal Synchronization Programming VCxCTL Bit Field Identification Field Identification ProgrammingField Detect Method Video Input Filtering Short and Long Field DetectVclkin VSYNC# VCTL2 HSYNC# VCTL1 Input Filter Modes 10. Input Filter Mode SelectionChrominance Re-sampling Operation Scaling Operation 2 Scaled Co-Sited Filtering Edge Pixel Replication 11. Edge Pixel Replication Ancillary Data Capture Horizontal Ancillary Hanc Data Capture Raw Data Capture ModeVertical Ancillary Vanc Data Capture Raw Data Capture Notification 11. Raw Data Mode Capture Operation Raw Data Fifo PackingFrmc TCI Capture Mode TCI Capture FeaturesTCI Data Capture TCI Capture Error Detection Synchronizing the System ClockPCR TCI Data Capture Notification 12. TCI Capture Mode OperationVcactl Bit Clear Frmc Writing to the Fifo Reading from the FifoPerr Psterr Capture Line Boundary Conditions Capturing Video in BT.656 or Y/C Mode Capturing Video in Raw Data Mode Handling Fifo Overrun in BT.656 or Y/C Mode Capturing Data in TCI Capture Mode Handling Fifo Overrun Condition in Raw Data Mode Handling Fifo Overrun Condition in TCI Capture Mode Video Capture Registers13. Video Capture Control Registers Video Capture Channel x Status Register VCASTAT, Vcbstat Fsync Frmc F2C F1C VcyposVcfld Vcxpos BT.656 or Y/C Mode Raw Data Mode TCI Mode Video Capture Channel a Control Register VcactlDescription Bit Rstch Blkcap None ResetRdfe Finv EXC Fldd Vrst Hrst Vcen Lfde Sfde Resmpl Eavfid FDL Eavsav ExternV1EAV V0EAV Video Capture Channel x Field 1 Start Register VCxSTRT1 Value BT.656 or Y/C Mode Raw Data Mode TCI Mode Video Capture Channel x Field 1 Stop Register VCxSTOP1 Video Capture Channel x Field 2 Start Register VCxSTRT2 VcystopVcxstop 26. Video Capture Channel x Field 2 Stop Register VCxSTOP2 Video Capture Channel x Field 2 Stop Register VCxSTOP2 Video Capture Channel x Vertical Interrupt Register VCxVINT VCTHRLD1 VCTHRLD2 Video Capture Channel B Control Register Vcbctl Video Capture Channel x Event Count Register VCxEVTCTCAPEVTCT2 CAPEVTCT1 Vrst Hrst Vcen 30. Video Capture Channel B Control Register Vcbctl SAV or VCTL1 inactive edge Not used BT.656, Y/C Mode, or Raw Data Mode TCI Mode TCI Capture Control Register Tcictl24. TCI Capture Control Register Tcictl Field Descriptions Inpcr TCI Clock Initialization LSB Register Tciclkinitl Bit Value Mode TCI Clock Initialization MSB Register TciclkinitmTCI System Time Clock LSB Register Tcistclkl TCI System Time Clock MSB Register Tcistclkm Default PcrmPcre Pcrm Pcre TCI System Time Clock Compare LSB Register Tcistcmpl TCI System Time Clock Compare MSB Register TcistcmpmATC TCI System Time Clock Compare Mask LSB Register Tcistmskl Value BT.656, Y/C Mode, or Raw Data Mode TCI ModeTCI System Time Clock Compare Mask MSB Register Tcistmskm Atcm Value BT.656, Y/C Mode, or Raw Data Mode TCI M ode TCI System Time Clock Ticks Interrupt Register TciticksTickct Video Capture Fifo Registers Capture Mode Register BT.656 or Y/C Raw Data34. Video Capture Fifo Registers 35. Video Capture Fifo Registers Function Displaying Video in BT.656 or Y/C Mode Video Display Field and Frame OperationVideo Display Registers Recommended Values Video Display Mode Selection Video Display Mode SelectionDmode Bits Mode Description Image Timing Smpte 296M Compatible Progressive Scan Display Interlaced Blanking Intervals and Video Areas Progressive Blanking Intervals and Video Area Video Display Counters Horizontal Blanking and Horizontal Sync Timing BT.656 Video Display Mode Sync Signal GenerationExternal Sync Operation Port Sync Operation Fpcount Vclkout Display Timing Reference Codes Line Number BT.656 Frame TimingLine Number 525/60 Description 3 BT.656 Image Display Blanking Codes4 BT.656 Fifo Unpacking Vclkout 1 Y/C Display Timing Reference Codes Y/C Video Display Mode2 Y/C Blanking Codes 3 Y/C Image Display 4 Y/C Fifo Unpacking Output Filter Mode SelectionVideo Output Filtering Output Filter Modes 2x Co-Sited Scaling 15. Chrominance Re-sampling 18. Output Edge Pixel Replication 2x Interspersed Scaling Ancillary Data Display Raw Data Display ModeHorizontal Ancillary Hanc Data Display Vertical Ancillary Vanc Data Display Raw Data Fifo Unpacking Raw Mode RGB Output Support Display Determination and Notification Video Display Field and Frame OperationDisplay Operation Vdctl Bit Display Line Boundary Conditions Video Display Event Generation Interlaced BT.656 Timing Example Display Timing ExamplesIpcount =IMGSIZE78 Yfifo Vclkin Fpcount Ipcount VCTL1 Hblnkac VCTL1 Hsyncac Vclkout FlcountFrmwidth = IMGHOFF1 = 112 26. BT.656 Interlaced Display Vertical Timing Example Interlaced Raw Display Example Vclkin Fpcount Ipcount VCTL1 HblnkabVCTL1 Hsyncab Vclkout 28. Raw Interlaced Display Vertical Timing Example 3 Y/C Progressive Display Example VCTL1 Hblnkac VCTL1 Hsyncac Vclkout Frmwidth = IMGHOFF1 = Hblnkstart =Hsyncstart = 1350 Hsyncstop = Flcount EAV Ilcount V F 30. Y/C Progressive Display Vertical Timing Example Displaying Video in BT.656 or Y/C Mode Displaying Video in Raw Data Mode Handling Under-run Condition of the Display Fifo Video Display Registers Video Display Status Register VdstatVideo Display Control Registers Video Display Status Register Vdstat Field Descriptions Video Display Control Register Vdctl Video Display Control Register Vdctl Field Descriptions BT.656 and Y/C Mode Raw Data Mode Video Display Control Register Vdctl Field Descriptions Blanking Value BT.656 and Y/C Mode Raw Data ModeNone Frmdis None Flddis Video Display Horizontal Blanking Register Vdhblnk Video Display Frame Size Register VdfrmszFrmheight Frmwidth Field has no effect BT.656 and Y/C Mode Raw Data Mode 31-28 Reserved VBLNKXSTOP1 VBLNKYSTOP1 VBLNKXSTART2 VBLNKYSTART2 DEFAULT0 Value BT.656 and Y/C ModeVBLNKYSTOP2 VBLNKXSTOP2 IMGVOFF1 Video Display Field 1 Image Offset Register VDIMGOFF1IMGHOFF1 None Negoff Video Display Field 1 Image Size Register VDIMGSZ1 IMGVSIZE1IMGHSIZE1 Video Display Field 2 Image Offset Register VDIMGOFF2 IMGVOFF2IMGHOFF2 Video Display Field 1 Timing Register VDFLDT1 Video Display Field 2 Image Size Register VDIMGSZ2IMGVSIZE2 IMGHSIZE2 FLD1YSTART Video Display Field 2 Timing Register VDFLDT2FLD1XSTART FLD2YSTART VDTHRLD2 Video Display Threshold Register VdthrldIncpix VDTHRLD1 Video Display Horizontal Synchronization Register Vdhsync HsyncstopHsyncstart VSYNCYSTART1 VSYNCXSTART1VSYNCYSTOP1 VSYNCXSTOP1 VSYNCYSTART2 VSYNCXSTART2 Vrld Video Display Counter Reload Register VdreloadCrld Hrld Crld Video Display Clipping Register Vdclip Video Display Event Register VddispevtDISPEVT2 DISPEVT1 Clipchigh Video Display Default Display Value Register Vddefval Crdefval Cbdefval Video Display Vertical Interrupt Register VdvintDefval Crdefval 56. Video Display Vertical Interrupt Register Vdvint Video Display Field Bit Register Vdfbit Fbitclr FbitsetVBITCLR1 VBITSET1 VBITSET2 VBITCLR2 Video Display Registers Recommended Values 34. Video Display Register Recommended ValuesRegister Field 525/60 Value Video Display Fifo Registers Display Mode35. Video Display Fifo Registers 36. Video Display Fifo Registers Function General-Purpose I/O Operation Gpio Registers Video Port RegistersOffset Address Acronym Register Name Type Video Port Peripheral Identification Register VppidClass Revision Class Peren Soft Free Video Port Peripheral Control Register PCRPeren Stop Video Port Pin Function Register Pfunc Field Descriptions Video Port Pin Function Register Pfunc Normal VDATA0TO9 Normal VDATA10TO19 Video Port Pin Direction Register Pdir Field Descriptions Video Port Pin Direction Register Pdir VDATA8TO9IN VDATA8TO9OUT VDATA12TO15IN VDATA12TO15OUTVDATA4TO7IN VDATA4TO7OUT VDATA0T32IN VDATA0T32OUT Video Port Pin Data Input Register Pdin Field Descriptions Video Port Pin Data Input Register Pdin Video Port Pin Data Out Register Pdout Field Descriptions Video Port Pin Data Output Register PdoutPDOUT9 PDOUT8 PDOUT7 PDOUT6 PDOUT5 PDOUT4 PDOUT3 PDOUT2 PDOUT22 When writing data, writes to PDOUT20 bit Video Port Pin Data Set Register Pdset Field Descriptions Video Port Pin Data Set Register Pdset Video Port Pin Data Clear Register Pdclr Field Descriptions Video Port Pin Data Clear Register Pdclr Video Port Pin Interrupt Enable Register Pien PIEN9 PIEN8 PIEN7 PIEN6 PIEN5 PIEN4 PIEN3 PIEN2PIEN22 Value Description Video Port Pin Interrupt Polarity Register Pipol PISTAT22 Video Port Pin Interrupt Status Register PistatNone VCTL3INT None VCTL2INT Video Port Pin Interrupt Clear Register Piclr PICLR9 PICLR8 PICLR7 PICLR6 PICLR5 PICLR4 PICLR3 PICLR2PICLR22 Vcxo Interpolated Control Port VIC Port Signal Direction Description VIC Port Interface SignalsOverview Interface Example Values for Interpolation Rate Operational Details Enabling VIC Port VIC Port RegistersVIC Port Registers VIC Control Register Vicctl Field Descriptions VIC Control Register Vicctl VIC Input Register Vicin VIC Input Register Vicin Field DescriptionsVicinbits VIC Clock Divider Register Vicdiv VIC Clock Divider Register Vicdiv Field DescriptionsVicclkdiv Products Applications DSPRfid