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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TMS320C6748
SPRS590G – JUNE 2009 – REVISED JANUARY 2017
TMS320C6748™ Fixed- and Floating-Point DSP
1
Device Overview
1
1.1
Features
1
• 375- and 456-MHz C674x Fixed- and Floating-
Point VLIW DSP
• C674x Instruction Set Features
– Superset of the C67x+ and C64x+ ISAs
– Up to 3648 MIPS and 2746 MFLOPS
– 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 Channel Controllers
– 3 Transfer Controllers
– 64 Independent DMA Channels
– 16 Quick DMA Channels
– Programmable Transfer Burst Size
• TMS320C674x 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 Two 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 × SP
→
SP Per Clock
–
2 SP × SP
→
DP Every Two Clocks
–
2 SP × DP
→
DP Every Three Clocks
–
2 DP × DP
→
DP Every Four Clocks
– Fixed-Point Multiply Supports Two 32 × 32-
Bit Multiplies, Four 16 × 16-Bit Multiplies, or
Eight 8 × 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
• Software Support
– TI DSP BIOS™
– Chip Support Library and DSP Library
• 128KB of RAM Shared Memory
• 1.8-V or 3.3-V LVCMOS I/Os (Except for USB and
DDR2 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
– DDR2/Mobile DDR Memory Controller With one
of the Following:
– 16-Bit DDR2 SDRAM With 256-MB Address
Space
– 16-Bit mDDR SDRAM With 256-MB Address
Space
• Three Configurable 16550-Type UART Modules:
– With Modem Control Signals
– 16-Byte FIFO
– 16x or 13x Oversampling Option
• LCD Controller
• Two Serial Peripheral Interfaces (SPIs) Each With
Multiple Chip Selects
• Two Multimedia Card (MMC)/Secure Digital (SD)
Card Interfaces With Secure Data I/O (SDIO)
Interfaces
• Two Master and Slave Inter-Integrated Circuits
(I
2
C Bus™)
