Video Display Registers

4.12.24 Video Display Default Display Value Register (VDDEFVAL)

The video display default display value register (VDDEFVAL) defines the default value to be output during the portion of the active video window that is not part of the displayed image. The VDDEFVAL is shown in Figure 4–62 for the BT.656 and Y/C modes and in Figure 4–63 for the raw data mode, and described in Table 4–29.

The default value is output during the nonimage display window portions of the active video. This is the region between ILCOUNT = 0 and ILCOUNT = IMGVOFFn vertically, and between IPCOUNT = 0 and IPCOUNT = IMGHOFFn horizontally. In BT.656 mode, CBDEFVAL, YDEFVAL, and CRDEFVAL are multiplexed on the output in the standard CbYCrY manner. In Y/C mode, YDEFVAL is output on the VDOUT[9–0] bus and CBDEFVAL and CRDEFVAL are multiplexed on the VDOUT[19–10] bus. In all cases, the default values are output on the 8 MSBs of the bus ([9–2] or [19–12]) and the 2 LSBs ([1–0] or [11–10]) are driven as 0s.

In raw data mode, the least significant 8, 10, 16, or 20 bits of DEFVAL are output depending on the bus width. The default value is also output during the horizontal and vertical blanking periods in raw data mode.

The default value is also output during the entire active video region when the BLKDIS bit in VDCTL is set and the FIFO is empty.

Figure 4–62. Video Display Default Display Value Register (VDDEFVAL)

31

24

23

16

 

CRDEFVAL

 

CBDEFVAL

 

 

 

 

 

R/W-0

 

R/W-0

15

8

7

0

 

 

 

 

 

Reserved

 

YDEFVAL

 

 

 

 

 

R/W-0

 

R/W-0

Legend: R/W = Read/Write; -n= value after reset

4-86

Video Display Port

SPRU629

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Texas Instruments TMS320C64x DSP manual Video Display Default Display Value Register Vddefval, Crdefval Cbdefval, Ydefval
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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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