摘要:
A digital signal processor that includes an instruction memory, a program control unit, and an instruction decoder. The instruction memory stores a sequence of instruction words including DSP instruction words and RISC instruction words. The program control unit outputs an instruction address to the instruction memory so as to select one instruction word in the instruction memory. Every DSP instruction word identifies one data processing operation and one data transfer operation to be performed. The DSP instruction words include a predefined DSP instruction word having separate source and destination fields for specifying register locations for data sources and data destinations. The RISC instruction words include a predefined RISC instruction word corresponding to the predefined DSP instruction word. The predefined RISC instruction word has separate source and destination fields for specifying register locations for data sources and data destinations. One of the source and destination fields in the predefined RISC instruction word has more bits than the corresponding field in the predefined DSP instruction word. The instruction decoder decodes the selected instruction.
摘要:
This invention relates to an information processing apparatus such as a digital signal processor and is applied particularly suitably to a digital filter.A plurality of data from initial value data till final value data relating to filtering coefficients of a digital filter are stored in a data memory, and are sequentially read out by an increment operation of an address arithmetic unit.A data arithmetic unit executes sequentially product and/or sum operations of a plurality of data that are sequentially read out and digital input signals that are sequentially inputted, to perform digital signal processing.The information processing apparatus is equipped particularly with means, which when an access address starts from an initial value, exceeds a final value and reaches a return address due to the increment operation, returns automatically the access address to the initial value. Therefore, a plurality of data stored in the data memory can be utilized repeatedly.Contrivances are made in order to set the number of a plurality of data that are stored in the data memory for repetition of use, to an arbitrary value.
摘要:
In a single chip processor which can be provided with an extended program memory, a high-speed access can be executed without being restricted by the access time for the external program memory when an internal program memory is employed, by varying the effective instruction cycle, and thus a high-speed processing performance for a single chip processor of a stored program type can be attained.
摘要:
A plurality of external input information are added to a selecting circuit. The output of the selecting circuit is fed back as one of the external input information to the selecting circuit. The input signal groups are decoded, and are produced as control signals to specify the external input information in synchronism with clock signals. When the input select signal groups have the non-selection mode, the output that is fed back is necessarily selected.
摘要:
An LSI system is disclosed in which a plurality of status registers for indicating the internal status of the system are connected to each other so as to form a hierarchical structure and the contents of each of the remaining status registers other than one status register can be transferred to an output register through a bus, to make it possible to provide additional status registers in the system without increasing the number of address signals used and the number of pins connected to external address signal lines.
摘要:
A multi-processor system for multidimensional image signal processing includes a plurality of co-processors and a host processor which issues processor numbers and a command to the co-processors through a bus. Due to the multi-dimensional nature of the processor numbers, data processing for given ranges of an image signal can be shared by the co-processors. A particular multi-dimensional processor number issued by the host computer which allows simultaneous communication to be performed between the host processor and the co-processors.
摘要:
A high-speed multiplier adapted to VLSI with a regularly arranged structure having a reduced number of addition stages. There is provided a carry save adder circuit wherein a time difference is imparted to signals input to full adders, in order to eliminate extra wait time in the signal propagation. That is, a carry signal of a full adder of two stages over is input with a speed increase of 1/2T.sub.FA.
摘要:
A pressure-sensitive adhesive double-coated sheet comprising a substrate, a pressure-sensitive adhesive layer (A) formed on one side of the substrate and a pressure-sensitive adhesive layer (B) formed on the other side of the substrate, wherein at least the pressure-sensitive adhesive layer (A) is formed with a pressure-sensitive adhesive comprising a butyl rubber as base material, and after the pressure-sensitive adhesive double-coated sheet is allowed to stand at 60° C. for five days while being placed between a moisture vapor-permeable waterproof sheet attached to the adhesive layer (A) and an aluminum plate attached to the adhesive layer (B), an expansion coefficient of the moisture vapor-permeable waterproof sheet is 0.5% or less. The pressure-sensitive adhesive double-coated sheet can allow the moisture vapor-permeable waterproof sheet to less expand over time when attached between the moisture vapor-permeable waterproof sheet and the adherend in a waterproof airtight structure of a construction.
摘要:
A button making device capable of simply exchanging a first pressed mold, a second pressed mold, and a pressing mold so as to produce buttons of different sizes; a polygonal button whose front surface plate is dome-wise curved and has its shape fixed; and such a button making device, are provided. The button making device has a sliding platform, two pressed molds, a fixed member, a pressing shaft, a pressing mold, and an operation mechanism. The pressed molds are provided on an attachment member which is removably attached to the sliding platform. The pressing mold is removably attached to a lower end of the pressing shaft using magnetic force. The present invention can be used for a button making device which can easily form a metal button by press processing which can be used as an accessory adhered to clothes or the like by a pin or the like.
摘要:
A method of working metal in which the microstructure of metal body is rendered fine to thereby enhance the strength, ductility or homogeneity thereof; a metal body obtained by the metal working method; and a metal-containing ceramic body obtained by the metal working method. In this metal working method, the deformation resistance of metal body or metal-containing ceramic body (hereinafter referred to simply as “metal body”) is lowered locally to thereby form low deformation resistance regions in the metal body, and shear deformation of the low deformation resistance regions is effected so as to fine the microstructure of metal body. In particular, the metal body is formed in unidirectionally drawn configuration so as to produce low deformation resistance regions crossing the metal body. Further, with respect to two non-low deformation resistance regions arranged to sandwich low deformation resistance region crossing the metal body, one non-low deformation resistance region is caused to have a relative position change to the other non-low deformation resistance region so as to effect shear deformation of the low deformation resistance region. The low deformation resistance regions can be moved along the direction of drawing of the metal body.