Texas Instruments TMS320C64x DSP guide

GPIO Registers

5.1.11 Video Port Pin Interrupt Status Register (PISTAT)

The video port pin interrupt status register (PISTAT) is shown in Figure 5–11 and described in Table 5–12. PISTAT is a read-only register that indicates the GPIO pin that has a pending interrupt.

A bit in PISTAT is set when the corresponding GPIO pin is configured as an interrupt (the corresponding bit in PIEN is set, the pin is enabled for GPIO in PFUNC, and the pin is configured as an input in PDIR) and the appropriate transition (as selected by the corresponding PIPOL bit) occurs on the pin. Whenever a PISTAT bit is set to 1, the GPIO bit in VPIS is set. The PISTAT bits are cleared by writing a 1 to the corresponding bit in PICLR. Writing a 0 has no effect. Clearing all the PISTAT bits does not clear the GPIO bit in VPIS, it must be explicitly cleared. If any bits in PISTAT are still set when the GPIO bit is cleared, the GPIO bit is set again.

Figure 5–11.Video Port		Pin Interrupt Status Register (PISTAT)
31								24

			Reserved

				R-0
23	22	21	20	19		18	17	16

Reserved	PISTAT22	PISTAT21	PISTAT20		PISTAT19	PISTAT18	PISTAT17	PISTAT16

R-0	R-0	R-0	R-0		R-0	R-0	R-0	R-0
15	14	13	12	11		10	9	8

PISTAT15	PISTAT14	PISTAT13	PISTAT12		PISTAT11	PISTAT10	PISTAT9	PISTAT8

R-0	R-0	R-0	R-0		R-0	R-0	R-0	R-0
7	6	5	4	3		2	1	0

PISTAT7	PISTAT6	PISTAT5	PISTAT4		PISTAT3	PISTAT2	PISTAT1	PISTAT0

R-0	R-0	R-0	R-0		R-0	R-0	R-0	R-0

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

SPRU629

General Purpose I/O Operation

5-23

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 Port Pin Interrupt Status Register Pistat

Models: TMS320C64x DSP

5.1.11 Video Port Pin Interrupt Status Register (PISTAT)

Figure 5–11.Video Port

Pin Interrupt Status Register (PISTAT)

SPRU629

TMS320C64x DSP specifications