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
Image processing device, image forming apparatus, and non-transitory computer readable recording medium
Automated measurement of concentration and/or amount in a biological sample
Novelty headband
Method of manufacturing touch panel
Method for identifying bacteria in a sample
Asynchronous line interface rate adaptation to the physical layer with synchronous lines at the connection layer
Vehicle having power supply apparatus
  Randomly Featured Patents
Molding die for optical recording disk
System and method for sending money via E-mail over the internet
Multipurpose handheld tool and associated method
Converter circuit arrangement with actively controllable current and voltage rise limiting means
Modular component system for assembly of material flow rails
Hydraulic damper for vehicle
Caulking spout
Faux bois chair
Fastener delivery tube
Magazine interlock for a fastener driving device