TMS320C6745DPTP3 TI TMS320C674x Floating/Fixed-Point DSP 300MHz DDR2 EMAC USB McASP HLQFP-176

TMS320C6745DPTP3 Product Overview

The TMS320C6745DPTP3 is a high-performance 32-bit floating/fixed-point digital signal processor (DSP) from Texas Instruments (TI), based on the TMS320C674x core in a 176-lead HLQFP (PTP) package, running at 300MHz. As a mid-to-high-end model in the C674x family that balances powerful signal processing with flexible peripheral integration, the TMS320C6745DPTP3 integrates 256KB of L2 unified mapped RAM/cache (configurable as a mix of cache and RAM), along with 32KB L1 program cache and 32KB L1 data cache. The TMS320C6745DPTP3 features industry-leading memory and interconnect interfaces: a 16-bit DDR2 EMIF provides up to 1600Mbps of external memory bandwidth, and a 16-bit EMIFA seamlessly connects to NAND/NOR Flash and SRAM; a 10/100 Ethernet MAC (EMAC) supports standard network communication; USB 2.0 OTG and USB 1.1 OHCI Host offer flexible connectivity to external devices. For audio and communication, the TMS320C6745DPTP3 provides three multi-channel audio serial ports (McASP), two SPIs, two I2Cs, three UARTs, and a universal parallel port (uPP), facilitating interconnection with various codecs, sensors, and processors. Additionally, eCAP capture modules and eQEP quadrature encoder interfaces meet the needs of industrial motion control and measurement applications. Leveraging the C674x core's Very Long Instruction Word (VLIW) architecture, the TMS320C6745DPTP3 efficiently executes floating-point FFTs and audio effect algorithms while also handling fixed-point control tasks at 300MHz, making it ideal for applications requiring high-performance audio processing, industrial control, biometric identification, and multi-function embedded systems. The HLQFP-176 package features exposed leads for easy soldering and visual inspection, providing a floating/fixed-point DSP platform that combines rich peripherals with manufacturing ease.

TMS320C6745DPTP3 Core Features

Processor Core: The TMS320C6745DPTP3 features a TMS320C674x floating/fixed-point VLIW DSP core, up to 300MHz, supporting single-precision floating-point and fixed-point operations

On-Chip Memory: The TMS320C6745DPTP3 provides 32KB L1P cache + 32KB L1D cache + 256KB L2 unified mapped RAM/cache (configurable)

DDR2 EMIF: The TMS320C6745DPTP3 integrates a 16-bit DDR2-300 interface, up to 1600Mbps, supporting up to 256MB external SDRAM

EMIFA: The TMS320C6745DPTP3 offers a 16-bit asynchronous external memory interface, supporting NAND/NOR Flash, SRAM, etc.

Network Interface: The TMS320C6745DPTP3 contains a 10/100 Ethernet MAC (EMAC), supporting MII/RMII interfaces

USB: The TMS320C6745DPTP3 delivers USB 2.0 OTG (High-Speed) + USB 1.1 OHCI Host, connecting to various USB devices

Audio & Serial Interfaces: The TMS320C6745DPTP3 is equipped with 3× McASP, 2× SPI, 2× I2C, 3× UART, all with DMA support

Universal Parallel Port (uPP): The TMS320C6745DPTP3 incorporates a high-speed parallel data interface, connectable to FPGAs, ADCs/DACs, or image sensors

Control Peripherals: The TMS320C6745DPTP3 includes an eCAP capture module, eQEP quadrature encoder interface, 3× 64-bit general-purpose timers

Power & Package: The TMS320C6745DPTP3 operates with core voltage 1.2V, I/O voltage 3.3V/1.8V; it comes in a 176-lead HLQFP (PTP) package, easy to hand-solder and visually inspect

TMS320C6745DPTP3 Applications

Professional Audio Processing: The TMS320C6745DPTP3 is ideal for digital effects, audio matrix processors, broadcast-grade audio equipment, guitar effects and modeling amplifiers

Industrial Control & Automation: The TMS320C6745DPTP3 can be deployed in high-performance servo drives, motion control, encoder feedback processing, real-time power electronics control

Biometric Identification: The TMS320C6745DPTP3 accelerates fingerprint recognition, iris recognition, face recognition algorithms

Communications & Networking: The TMS320C6745DPTP3 is suitable for software-defined radio front-ends, Ethernet audio transmission, industrial gateways

Medical & Instrumentation: The TMS320C6745DPTP3 supports portable ultrasound back-end processing, multi-parameter patient monitors, vibration spectrum analysis

TMS320C6745DPTP3 Key Advantages

Floating/Fixed-Point Dual Capability: Based on the C674x core, the TMS320C6745DPTP3 supports efficient single-precision floating-point operations (audio, imaging, etc.) while also executing fixed-point control tasks (motor, digital power), covering multiple algorithm needs with a single chip.

Rich External Memory Interfaces: The DDR2 EMIF provides large-capacity high-speed data buffering, and the EMIFA on the TMS320C6745DPTP3 connects to NAND/NOR Flash and SRAM, facilitating firmware and data storage beyond on-chip memory limits.

Complete Networking & USB Connectivity: The TMS320C6745DPTP3’s integrated 10/100 EMAC, USB 2.0 OTG, and USB 1.1 Host enable direct Ethernet connection or attachment of USB drives, USB audio devices, and USB Bluetooth adapters, offering flexible expansion.

Multi-Channel Audio & Parallel Interface: Three McASPs on the TMS320C6745DPTP3 can simultaneously connect multiple digital audio devices; the uPP provides a high-speed parallel data path suitable for connecting FPGAs or high-speed ADCs/DACs.

Comprehensive Industrial Control Interfaces: eQEP directly interfaces with incremental encoders, and eCAP performs precise pulse width measurement on the TMS320C6745DPTP3, ideal for closed-loop feedback in servo drives and motion control systems.

HLQFP-176 Package, Production-Friendly: The 176-lead thin quad flat pack of the TMS320C6745DPTP3 with exposed leads facilitates hand soldering, automated production, and visual inspection, lowering manufacturing barriers.

Mature Development Ecosystem: The TMS320C6745DPTP3 is fully supported by free Code Composer Studio (CCS) IDE and DSP/BIOS real-time operating system, along with extensive application notes and reference designs, significantly shortening development cycles.

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FAQ

1. How does the TMS320C6745DPTP3 differ from the TMS320C6743 or C6747?
   
   • The TMS320C6745DPTP3 adds a uPP universal parallel port and more McASPs (3 vs. 2) compared to the C6743, making it suitable for applications requiring high-speed parallel data and richer audio interfaces.
   • Compared to the C6747, the TMS320C6745DPTP3 lacks an LCD controller and video input interface but retains core peripherals such as EMAC, USB, and DDR2, striking a good balance between cost and functionality.
2. What is the capacity and bandwidth of the DDR2 EMIF?
   
   • The 16-bit DDR2 EMIF on the TMS320C6745DPTP3 supports up to 256MB of external DDR2 SDRAM with an interface speed of 300MHz (DDR2-600), providing up to 1600Mbps theoretical bandwidth.
   • This capacity and bandwidth are fully sufficient for most audio processing, industrial control, and data acquisition applications involving the TMS320C6745DPTP3.
3. What audio interfaces does the chip support? How many audio channels can be connected simultaneously?
   
   • The TMS320C6745DPTP3 provides 3 multi-channel audio serial ports (McASP), all supporting I2S, TDM, and other audio formats, directly connectable to audio ADCs/DACs/Codecs.
   • Each McASP on the TMS320C6745DPTP3 supports multiple serial data channels, allowing the system to handle multiple independent audio streams simultaneously, meeting the demands of multi-channel recording, audio matrices, or surround sound systems.
4. What is the floating- and fixed-point performance like? Which algorithms are suitable?
   
   • The C674x core of the TMS320C6745DPTP3 natively supports 32-bit single-precision floating-point and 32-bit fixed-point operations, delivering powerful processing capability at 300MHz.
   • Floating-point performance is particularly suitable for FFT, digital filters, audio effects, and image processing algorithms; fixed-point excels at control loops, encoder decoding, and similar tasks—one chip covers multiple workloads.
5. What networking and USB functions does the chip support?
   
   • The TMS320C6745DPTP3 integrates a 10/100 EMAC, which can connect to an external PHY via MII/RMII for standard Ethernet communication.
   • For USB, the TMS320C6745DPTP3 supports USB 2.0 OTG (device or host) and an independent USB 1.1 OHCI Host, allowing simultaneous connection of USB drives, USB audio devices, or USB Bluetooth adapters.
6. What can the eQEP and eCAP modules be used for?
   
   • eQEP directly interfaces with incremental encoders, enabling the TMS320C6745DPTP3 to perform high-precision position, velocity, and direction sensing, suitable for servo drives and motor control.
   • eCAP precisely measures pulse width, frequency, and duty cycle on the TMS320C6745DPTP3, suitable for sensor signal acquisition and duty cycle monitoring in power electronics.
7. What tools and software are needed for development?
   
   • Use TI's free Code Composer Studio (CCS) IDE for development and debugging of the TMS320C6745DPTP3.
   • Hardware debuggers such as the XDS100 or XDS200 series are recommended, supporting JTAG in-circuit programming and real-time debugging of the TMS320C6745DPTP3.
   • TI provides extensive C674x DSP libraries, including FFT, filtering, and math functions, to significantly accelerate algorithm development for the TMS320C6745DPTP3.
8. Is the HLQFP-176 package difficult to solder?
   
   • The HLQFP-176 package of the TMS320C6745DPTP3 is a thin quad flat pack with exposed leads and 0.5mm pin pitch, classified as a medium-density QFP package.
   • Standard reflow soldering processes achieve high yield with the TMS320C6745DPTP3; hand soldering is also possible using flux and drag-soldering techniques, with visible joints for easy inspection and repair.
9. What boot modes does the chip support?
   
   • The TMS320C6745DPTP3 supports booting from EMIFA (NOR/NAND Flash), SPI Flash, I2C EEPROM, UART, USB, and other interfaces, offering high flexibility.
   • The most suitable boot medium can be selected based on system requirements, simplifying production flow for the TMS320C6745DPTP3.
10. What are the upgrade options if I need higher performance or more peripherals?
    
    • Within the same family, the TMS320C6747 adds an LCD controller and video input interface, while the C6748 also integrates a SATA controller and more L2 RAM, providing natural upgrade paths from the TMS320C6745DPTP3.
    • For multi-core heterogeneous processing, consider TI's OMAP-L138 (ARM9+DSP) or the 66AK2Gx series.