The TMS320C6745/6747 device is a low-power digital signal processor based on a TMS320C674x DSP core. It consumes significantly lower power than other members of the TMS320C6000 platform of DSPs.
The TMS320C6745/6747 device enables original-equipment manufacturers (OEMs) and original-design manufacturers (ODMs) to quickly bring to market devices featuring high processing performance .
The TMS320C6745/6747 DSP core uses a two-level cache-based architecture. The Level 1 program cache (L1P) is a 32-KB direct mapped cache and the Level 1 data cache (L1D) is a 32-KB 2-way set-associative cache. The Level 2 program cache (L2P) consists of a 256-KB memory space that is shared between program and data space. L2 memory can be configured as mapped memory, cache, or combinations of the two. Although the DSP L2 is accessible by other hosts in the system, an additional 128KB of RAM shared memory (TMS320C6747 only) is available for use by other hosts without affecting DSP performance.
The peripheral set includes: a 10/100 Mbps Ethernet MAC (EMAC) with a management data input/output (MDIO) module; two I2C Bus interfaces; 3 multichannel audio serial ports (McASPs) with 16/9 serializers and FIFO buffers; two 64-bit general-purpose timers each configurable (one configurable as watchdog); a configurable 16-bit host-port interface (HPI) [TMS320C6747 only]; up to 8 banks of 16 pins of general-purpose input/output (GPIO) with programmable interrupt/event generation modes, multiplexed with other peripherals; 3 UART interfaces (one with both RTS and CTS); three enhanced high-resolution pulse width modulator (eHRPWM) peripherals; three 32-bit enhanced capture (eCAP) module peripherals which can be configured as 3 capture inputs or 3 auxiliary pulse width modulator (APWM) outputs; two 32-bit enhanced quadrature encoded pulse (eQEP) peripherals; and 2 external memory interfaces: an asynchronous and SDRAM external memory interface (EMIFA) for slower memories or peripherals, and a higher speed memory interface (EMIFB) for SDRAM.
The Ethernet Media Access Controller (EMAC) provides an efficient interface between the TMS320C6745/6747 device and the network. The EMAC supports both 10Base-T and 100Base-TX, or 10 Mbps and 100 Mbps in either half- or full-duplex mode. Additionally, an MDIO interface is available for PHY configuration.
The rich peripheral set provides the ability to control external peripheral devices and communicate with external processors. For details on each of the peripherals, see the related sections later in this document and the associated peripheral reference guides.
Software Support
TI DSP/BIOS
Chip Support Library and DSP Library
375- and 456-MHz TMS320C674x VLIW DSP
C674x Instruction Set Features
Superset of the C67x+ and C64x+ ISAs
Up to 3648 MIPS and 2736 MFLOPS C674x
Byte-Addressable (8-, 16-, 32-, and 64-Bit Data)
8-Bit Overflow Protection
Bit-Field Extract, Set, Clear
Normalization, Saturation, Bit-Counting
Compact 16-Bit Instructions
C674x Two-Level Cache Memory Architecture
32KB of L1P Program RAM/Cache
32KB of L1D Data RAM/Cache
256KB of L2 Unified Mapped RAM/Cache
Flexible RAM/Cache Partition (L1 and L2)
Enhanced Direct Memory Access Controller 3 (EDMA3):
2 Transfer Controllers
32 Independent DMA Channels
8 Quick DMA Channels
Programmable Transfer Burst Size
TMS320C674x Fixed- and Floating-Point VLIW DSP Core
Load-Store Architecture with Nonaligned Support
64 General-Purpose Registers (32-Bit)
Six ALU (32- and 40-Bit) Functional Units
Supports 32-Bit Integer, SP (IEEE Single Precision/32-Bit) and DP (IEEE Double Precision/64-Bit) Floating Point
Supports up to Four SP Additions Per Clock, Four DP Additions Every 2 Clocks
Supports up to Two Floating-Point (SP or DP) Reciprocal Approximation (RCPxP) and Square-Root Reciprocal Approximation (RSQRxP) Operations Per Cycle
Two Multiply Functional Units
Mixed-Precision IEEE Floating Point Multiply Supported up to:
2 SP x SP -> SP Per Clock
2 SP x SP -> DP Every Two Clocks
2 SP x DP -> DP Every Three Clocks
2 DP x DP -> DP Every Four Clocks
Fixed-Point Multiply Supports Two 32 x 32-Bit Multiplies, Four 16 x 16-Bit Multiplies, or Eight 8 x 8-Bit Multiplies per Clock Cycle, and Complex Multiples
Instruction Packing Reduces Code Size
All Instructions Conditional
Hardware Support for Modulo Loop
Operation
Protected Mode Operation
Exceptions Support for Error Detection and Program Redirection
128KB of RAM Shared Memory (TMS320C6747 Only)
3.3-V LVCMOS I/Os (Except for USB Interfaces)
Two External Memory Interfaces:
EMIFA
NOR (8- or 16-Bit-Wide Data)
NAND (8- or 16-Bit-Wide Data)
16-Bit SDRAM with 128-MB Address Space (TMS320C6747 Only)
EMIFB
32-Bit or 16-Bit SDRAM with 256-MB Address Space (TMS320C6747)
16-Bit SDRAM with 128-MB Address Space (TMS320C6745)
Three Configurable 16550-Type UART Modules:
UART0 with Modem Control Signals
Autoflow Control Signals (CTS, RTS) on UART0 Only
16-Byte FIFO
16x or 13x Oversampling Option
LCD Controller (TMS320C6747 Only)
Two Serial Peripheral Interfaces (SPIs) Each with One Chip Select
Multimedia Card (MMC)/Secure Digital (SD) Card Interface with Secure Data I/O (SDIO)
Two Master and Slave Inter-Integrated Circuit (I2C Bus™)
One Host-Port Interface (HPI) with 16-Bit-Wide Muxed Address/Data Bus for High Bandwidth (TMS320C6747 Only)
Programmable Real-Time Unit Subsystem (PRUSS)
Two Independent Programmable Realtime Unit (PRU) Cores
32-Bit Load and Store RISC Architecture
4KB of Instruction RAM per Core
512 Bytes of Data RAM per Core
PRUSS can be Disabled via Software to Save Power
Standard Power-Management Mechanism
Clock Gating
Entire Subsystem Under a Single PSC Clock Gating Domain
Dedicated Interrupt Controller
Dedicated Switched Central Resource
USB 1.1 OHCI (Host) with Integrated PHY (USB1) (TMS320C6747 Only)
USB 2.0 OTG Port with Integrated PHY (USB0)
USB 2.0 High- and Full-Speed Client (TMS320C6747)
USB 2.0 Full-Speed Client (TMS320C6745)
USB 2.0 High-, Full-, and Low-Speed Host (TMS320C6747)
USB 2.0 Full- and Low-Speed Host (TMS320C6745)
High-Speed Functionality Available on TMS320C6747 Device Only
End Point 0 (Control)
End Points 1,2,3,4 (Control, Bulk, Interrupt or ISOC) RX and TX
Three Multichannel Audio Serial Ports (McASPs):
TMS320C6747 Supports 3 McASPs
TMS320C6745 Supports 2 McASPs
Six Clock Zones and 28 Serial Data Pins
Supports TDM, I2S, and Similar Formats
DIT-Capable (McASP2)
FIFO Buffers for Transmit and Receive
10/100 Mbps Ethernet MAC (EMAC):
IEEE 802.3 Compliant (3.3-V I/O Only)
RMII Media-Independent Interface
Management Data I/O (MDIO) Module
Real-Time Clock with 32-kHz Oscillator and Separate Power Rail (TMS320C6747 Only)
One 64-Bit General-Purpose Timer (Configurable as Two 32-Bit Timers)
One 64-Bit General-Purpose Watchdog Timer (Configurable as Two 32-Bit General-Purpose Timers)
Three Enhanced Pulse Width Modulators (eHRPWMs):
Dedicated 16-Bit Time-Base Counter with Period and Frequency Control
6 Single Edge, 6 Dual Edge Symmetric, or 3 Dual Edge Asymmetric Outputs
Dead-Band Generation
PWM Chopping by High-Frequency Carrier
Trip Zone Input
Three 32-Bit Enhanced Capture (eCAP) Modules:
Configurable as 3 Capture Inputs or 3 Auxiliary Pulse Width Modulator (APWM) Outputs
Single-Shot Capture of up to Four Event Time-Stamps
Two 32-Bit Enhanced Quadrature Encoder Pulse (eQEP) Modules
