Texas Instruments TMS320C6457 manual Data Register Hpid Field Descriptions, HPI data

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HPI Registers

8.5Data Register (HPID)

The 32-bit register HPID provides the data path between the host and the HPI DMA logic. During a host write cycle, the host fills HPID with 32 bits, and then the HPI DMA logic transfers the 32-bit value to the internal memory of the DSP. During a host read cycle, the HPI DMA logic fills HPID with 32 bits from the internal memory, and then the HPI transfers the 32-bit value to the host. A host cycle is a single 32-bit transfer (in the 32-bit multiplexed mode) or two consecutive 16-bit transfers (in the 16-bit multiplexed mode).

As shown in Figure 34, the host has full read/write access to HPID. The CPU cannot access HPID.

In the multiplexed modes, HPID is actually a port through which the host accesses two first-in, first-out buffers (FIFOs). The read FIFO and the write FIFO play a significant role in providing a higher data throughput. For information about the FIFOs, see Section 6.

Figure 34. Data Register (HPID) (Host access permissions, CPU cannot access HPID)

31-0

DATA

R/W-0

LEGEND: R = Read only; W = Write; -n= Value after hardware reset

 

 

 

Table 10. Data Register (HPID) Field Descriptions

 

 

 

Bit

Field

Value

Description

 

 

 

 

31-0

DATA

 

HPI data

 

 

 

 

SPRUGK7A –March 2009 –Revised July 2010

Host Port Interface (HPI)

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Copyright © 2009–2010, Texas Instruments Incorporated

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Contents Users Guide SPRUGK7A -March 2009 -Revised July Has Appendix aHDS2 HDS1 HCS List of Figures List of Tables Related Documentation From Texas Instruments About This ManualNotational Conventions Introduction to the HPI Summary of the HPI Registers Summary of HPI Registers Summary of the HPI SignalsHPI Signals Hstrb HR/WI Hhwili HasiDual-HPIA Mode Using the Address RegistersSingle-HPIA Mode HPI Operation Host-HPI Signal ConnectionsHhwil HPI Configuration and Data Flow HDS2, HDS1, and HCS Data Strobing and Chip Selection Options for Connecting Host and HPI Data Strobe PinsAvailable Host Data Strobe Pins Cycle Types Selectable With the Hcntl and HR/W Signals Access Types Selectable by the Hcntl SignalsHCNTL10 and HR/W Indicating the Cycle Type Cycle TypeHas Forcing the HPI to Latch Control Information Early Hrdy a Hhwil HCS HasHrdya Hhwil HCS Has HR/WHstrb HR/W Performing a Multiplexed Access Without hasBit Multiplexed Mode Host Write Cycle With has Tied High Hardware Handshaking Using the HPI-Ready Hrdy Signal Single-Halfword Hpic Cycle in the 16-Bit Multiplexed ModeHrdy Hrdy Behavior During 16-Bit Multiplexed Read OperationsHR/W Hhwil Hrdy Behavior During 16-Bit Multiplexed Write OperationsHrdy Behavior During 32-Bit Multiplexed Read Operations Hpia Write Hrdy Behavior During 32-Bit Multiplexed Write OperationsHpid Read Hpia Write HPID+ ReadsHpia Write Hpid Write Hpia Write HPID+ Writes Polling the Hrdy Bit Software Handshaking Using the HPI Ready Hrdy BitDspint Bit Host-to-CPU Interrupts Interrupts Between the Host and the CPUHint Bit CPU-to-Host Interrupts DSPINT=0CPU-to-Host Interrupt State Diagram Read Bursting FIFOs and BurstingWrite Bursting Fifo Flush Conditions Fifo Behavior When a Hardware Reset or Software Reset OccursSoftware Reset Considerations Emulation and Reset ConsiderationsHardware Reset Considerations Emulation ModesHost Port Interface HPI Registers HPI RegistersIntroduction Soft Free R/W-0 R/W-0 Power and Emulation Management Register PwremumgmtBit Field Value Description SoftHost Port Interface Control Register Hpic Fetch DualhpiaFor host write cycle HPID/HPIC/HPIAR/HPIAWBit Field Value Description 31-0 Host Port Interface Address Registers Hpiaw and HpiarAddress Data Register Hpid Field Descriptions Data Register HpidData HPI dataSeeAdditions/Modifications/Deletions Appendix a Revision HistoryTMS320C6457 HPI Revision History Rfid Products Applications

TMS320C6457 specifications

The Texas Instruments TMS320C6457 is a high-performance digital signal processor (DSP) designed for demanding applications in telecommunications, industrial control, and video processing. As part of the TMS320C6000 family, the C6457 combines advanced features with impressive processing capabilities, making it a popular choice among developers looking for efficient and robust solutions.

One of the key features of the TMS320C6457 is its architecture, which is based on the super Harvard architecture. This design separates program and data memory paths, allowing for parallel instruction execution. The C6457 operates at clock speeds of up to 1 GHz, enabling it to deliver peak performance of over 6,000 MIPS (Million Instructions Per Second) and 12,000 MADDs (Multiply-Accumulate operations per second). Such high throughput makes the C6457 suitable for real-time processing applications that require rapid data handling.

The C6457 DSP integrates a rich set of on-chip resources, including up to 1MB of on-chip SRAM, which serves as a fast cache for data and instructions. The device features multiple high-speed interfaces, such as 10/100/1000 Ethernet, Serial RapidIO, and PCI-Express, facilitating seamless connectivity with other devices and systems. Furthermore, the TMS320C6457 supports various communication protocols, allowing it to adapt to a wide range of application scenarios.

In terms of power efficiency, the TMS320C6457 is designed with sophisticated power management features. It includes dynamic voltage and frequency scaling, which adjust power consumption based on workload requirements without compromising performance. This capability is particularly valuable in battery-operated devices or environments where thermal management is critical.

The TMS320C6457 also benefits from extensive software support, including the Texas Instruments DSP/BIOS real-time operating system and Code Composer Studio integrated development environment. Developers can leverage these tools for efficient code development, debugging, and system optimization. Additionally, Texas Instruments provides a range of libraries and algorithms optimized for the C6457, facilitating rapid application development.

Overall, the Texas Instruments TMS320C6457 DSP stands out due to its robust architecture, high processing capabilities, comprehensive connectivity options, and power management features. These attributes make it a versatile solution for a broad spectrum of applications in digital signal processing, where performance and efficiency are paramount. As technology continues to advance, the TMS320C6457 remains a relevant and potent option for developers seeking to push the boundaries of digital signal processing.
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