Video Display Mode Selection

4.1 Video 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 16/20-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

Digital video output is in YCbCr 4:2:2 with 8-bit resolution

 

Display

multiplexed in ITU-R BT.656 format.

001

10-Bit ITU-R BT.656

Digital video output is in YCbCr 4:2:2 with 10-bit resolution

 

Display

multiplexed in ITU-R BT.656 format.

010

8-Bit Raw Display

8-bit data output

011

10-Bit Raw Display

10-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.

101

10-Bit Y/C Display

Digital video is output in YCbCr 4:2:2 with 10-bit resolution on

 

 

parallel Y and Cb/Cr multiplexed channels.

110

16-Bit Raw Display

16-bit data output.

111

20-Bit Raw Display

20-bit data output.

 

 

 

4.1.1Image 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 4–3 for interlaced video and in Figure 4–4 for progressive video. The video display module generates timing for frames, active video areas within frames, and images within the active video area.

4-2

Video Display Port

SPRU629

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Texas Instruments TMS320C64x DSP manual Video Display Mode Selection, Image Timing, Dmode Bits Mode Description
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TMS320C64x DSP specifications

The TMS320C64x DSP family from Texas Instruments represents a significant milestone in the realm of digital signal processing. Launched as part of the C6000 series, the C64x DSPs are designed for high-performance applications requiring intensive computational capabilities, such as telecommunications, audio processing, video processing, and industrial control systems.

One of the standout features of the TMS320C64x DSP is its VLIW (Very Long Instruction Word) architecture, which allows for an exceptionally high level of parallelism. This architecture enables multiple instructions to be executed simultaneously, boosting the overall throughput and allowing for complex data processing tasks to be completed more quickly than with conventional DSPs.

The C64x DSPs also boast an impressive clock frequency range, typically up to 1 GHz, delivering substantial computational power for real-time processing goals. Additionally, these processors feature extensive on-chip memory, including L1 and L2 cache, which significantly enhances data access speeds and helps reduce bottlenecks during high-demand processing tasks.

Another key characteristic of the TMS320C64x family is its support for advanced instruction sets optimized for specific applications. These include SIMD (Single Instruction, Multiple Data) capabilities, allowing for efficient handling of large datasets often involved in multimedia processing or complex signal manipulation.

For connectivity, these DSPs often integrate advanced interfaces such as EMIF (External Memory Interface) and McBSP (Multichannel Buffered Serial Port), facilitating seamless interaction with a variety of peripheral devices. This ensures that the DSP can suit different application needs and integrate well into various system architectures.

Texas Instruments emphasizes low power consumption with the C64x DSPs, making them ideal for portable or energy-sensitive applications. Advanced power management techniques and technologies, such as dynamic voltage and frequency scaling, are incorporated to further enhance energy efficiency without compromising performance.

In summary, the Texas Instruments TMS320C64x DSP family stands out due to its high-performance capabilities driven by a VLIW architecture, high clock speeds, extensive memory options, a rich instruction set, and advanced connectivity features, all while maintaining power efficiency. These characteristics make it an exceptional choice for developers looking to integrate robust digital signal processing into their applications, whether in telecommunications, audio and video processing, or embedded control systems.
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