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The TMS320C64xx is Texas Instruments fastest (currently) fixed point DSP family. It's part of the TMS320C6x DSP family, which is in turn part of the TMS320 family.

• It has 256 bit VLIW Very long instruction word based on VelociTI instruction set dual Harvard architecture.
• 32 bit data word length
• Clock speed ranging from 300 - 1000MHz
• Code compatible with the older C6200 fixed point family and with the C6700 floating point family.
• The C64xx cpu has two sets of functional units. Each set contains four units and a register file of 32 32-bit registers. There is a cross path between the sets of functional units.
  • M - All multiplication operations also include bit-count, rotate, Galois field multiplies, and bidirectional variable shift hardware.
  • L - Logic and arithmetic operations - 32/40-bit arithmetic and compare operations and 32-bit logical operations
  • S - Logic and arithmetic operations - 32-bit arithmetic operations , 32/40-bit shifts and 32-bit bit-field operations, 32-bit logical operations , Branches, Constant generation and Register transfers to/from control register file (.S2 only)
  • D - Data addressing units - Address calculations, loads and stores, constant generation and 32 logical operations

For more details +

• 64 registers of 32-bit word length
• Capable of up to four 16-bit MAC (multiply-accumulates) per cycle or up to eight 8-bit MAC per cycle.

Main article: Texas Instruments DaVinci

Specialised version with integrated peripherals for digital media applications including:

• Two to three video ports
• Ethernet MAC
• Option for PCI - DM642 only
• Vic - analog-to-digital converter (9 - 16 bit resolution)
• I2C

• C6400 DSP's
• C6455 datasheet and user guide Currently TI's most powerful DSP
• DM642 datasheet and userguide
• TI DSP developer site
• TI getting started with DSP page

• TMS320C6000 CPU and Instruction Set Reference Guide