Resources Contact Us Home

Image Number 18 for United States Patent #6658578.

A processor (100) is provided that is a programmable fixed point digital signal processor (DSP) with variable instruction length, offering both high code density and easy programming. Architecture and instruction set are optimized for low power consumption and high efficiency execution of DSP algorithms, such as for wireless telephones, as well as pure control tasks. The processor includes an instruction buffer unit (106), a program flow control unit (108), an address/data flow unit (110), a data computation unit (112), and multiple interconnecting busses. Dual multiply-accumulate blocks improve processing performance. A memory interface unit (104) provides parallel access to data and instruction memories. The instruction buffer is operable to buffer single and compound instructions pending execution thereof. A decode mechanism is configured to decode instructions from the instruction buffer. The use of compound instructions enables effective use of the bandwidth available within the processor. A soft dual memory instruction can be compiled from separate first and second programmed memory instructions. Instructions can be conditionally executed or repeatedly executed. Bit field processing and various addressing modes, such as circular buffer addressing, further support execution of DSP algorithms. The processor includes a multistage execution pipeline with pipeline protection features. Various functional modules can be separately powered down to conserve power. The processor includes emulation and code debugging facilities with support for cache analysis.

  Recently Added Patents
Soybean sequences associated with the FAP3 locus
Electric washing machine
Evolutionary clustering algorithm
Mechanisms for marking the orientation of a sawed die
Method of and apparatus for evaluating an optimal irradiation amount of an electron beam for drawing a pattern onto a sample
Cylindrical LED fixture
Business card assembly
  Randomly Featured Patents
Method for reducing emotional lability
Method of autogenously drying coal
Chrysanthemum plant named `Evans`
Subsurface water drainage system
Automatic fading device for motion picture camera
Numerical control apparatus for a machine tool
Rock bit having a seal gland with a conical sealing surface
Dual-plane graphics
Pet casket
Vehicle seatback frame, and a seat including such a frame