Video Capture Mode Selection | Texas Instruments TMS320C64x DSP

Video Capture Mode Selection

3.1 Video Capture Mode Selection

The video capture module operates in one of nine modes as listed in Table 3–1. The transport stream interface (TSI) selection is made using the TSI bit in the video port control register (VPCTL). The CMODE bits are in the video capture channel x control register (VCxCTL). The Y/C and 16/20-bit raw capture modes may only be selected for channel A and only if the DCHNL bit in VPCTL is cleared to 0.

When operating as a raw video capture channel, no data selection or data interpretation is performed. The 16/20-bit raw capture mode is designed to accept data from A/D converters with resolution higher than eight bits (used, for example, in medical imaging).

Table 3–1. Video Capture Mode Selection

TSI Bit	CMODE Bits	Mode	Description
0	000	8-Bit ITU-R BT.656	Digital video input is in YCbCr 4:2:2 with 8-bit
		Capture	resolution multiplexed in ITU-R BT.656 format.
0	001	10-Bit ITU-R	Digital video input is in YCbCr 4:2:2 with 10-bit
		BT.656 Capture	resolution multiplexed in ITU-R BT.656 format.
0	010	8-Bit Raw Capture	Raw 8-bit data capture at sampling rates up to
			80 MHz.
0	011	10-Bit Raw Capture	Raw 8-bit or 10-bit data capture at sampling rates up
			to 80 MHz.
0	100	8-Bit Y/C Capture	Digital video input is in YCbCr 4:2:2 with 8-bit
			resolution on parallel Y and Cb/Cr multiplexed
			channels.
0	101	10-Bit Y/C Capture	Digital video input is in YCbCr 4:2:2 with 10-bit
			resolution on parallel Y and Cb/Cr multiplexed
			channels.
0	110	16-Bit Raw Capture	Raw 16-bit data capture at sampling rates up to
			80 MHz.
0	111	20-Bit Raw Capture	Raw 20-bit data capture at sampling rates up to
			80 MHz.
1	010	TSI Capture	8-bit parallel TSI capture at rates up to 30 MHz.

3-2

Video Capture Port

SPRU629

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.

Texas Instruments TMS320C64x DSP manual Video Capture Mode Selection

Models: TMS320C64x DSP

3.1 Video Capture Mode Selection

Table 3–1. Video Capture Mode Selection

TSI Bit

CMODE Bits

Mode

Description

TMS320C64x DSP specifications