GPIO Registers

5.1.2Video Port Peripheral Control Register (PCR)

The video port peripheral control register (PCR) determines operation during emulation. The video port peripheral control register is shown in Figure 5–2 and described in Table 5–3.

Normal operation is to not halt the port during emulation suspend. This allows a displayed image to remain visible during suspend. However, this will only work if one of the continuous capture/display modes is selected because non- continuous modes require CPU intervention for DMAs to continue indefinitely (and the CPU is halted during emulation suspend).

When FREE = 0, emulation suspend can occur. Clocks and counters continue to run in order to maintain synchronization with external devices. The video port waits until a field boundary to halt DMA event generation, so that upon restart the video port can begin generating events again at the precise point it left off. After exiting suspend, the video port waits for the correct field bound- ary to occur and then reenables DMA events. The DMA pointers will be at the correct location for capture/display to resume where it left off. The emulation suspend operation is similar to the BLKCAP or BLKDISP operation with the difference being that BLKCAP and BLKDISP operations take effect immedi- ately rather than at field completion and rely on you to reset the DMA mecha- nism before they are cleared.

There is no separate emulation suspend mechanism on the video capture side. The field and frame operation (see Table 3–6 on page 3-18)can be used as emulation suspend.

Figure 5–2. Video Port Peripheral Control Register (PCR)

31

 

 

 

16

 

Reserved

 

 

 

 

 

 

 

 

 

R-0

 

 

 

15

3

2

1

0

 

 

 

 

 

Reserved

 

PEREN

SOFT

FREE

 

 

 

 

 

R-0

 

R/W-0

R-0

R/W-1

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

5-4

General Purpose I/O Operation

SPRU629

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Texas Instruments TMS320C64x DSP manual Video Port Peripheral Control Register PCR, Soft Free
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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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