Realization of Multiple-Output Functions by Reconfigurable Cascades
نویسندگان
چکیده
A realization of multiple-output logic functions using a RAM and a sequencer is presented. First, a multiple-output function is represented by an encoded characteristic function for non-zeros (ECFN). Then, it is represented by a cascade of look-up tables (LUTs). And finally, the cascade is simulated by a RAM and a sequencer. Multiple-output functions for benchmark functions are realized by cascades of LUTs, and the number of LUTs and levels of cascades are shown. A partition method of outputs for parallel evaluation is also presented. A prototype has been developed by using RAM and FPGA. This realization uses time domain multiplexing, and is useful for the case where the number of output pins is limited.
منابع مشابه
A Cascade Realization of Multiple-Output Function for Reconfigurable Hardware
A realization of multiple-output logic functions using a RAM and a sequencer is presented. First, a multiple-output function is represented by an encoded characteristic function for non-zeros (ECFN). Then, it is represented by a cascade of look-up tables (LUTs). And finally, the cascade is simulated by a RAM and a sequencer. Multiple-output functions for benchmark functions are realized by casc...
متن کاملA Design Method for Irredundant Cascades
A realization of multiple-output logic functions using an irredundant cascade is presented. First, a multiple-output function is represented by an encoded characteristic function for non-zeros (ECFN). Then, it is represented by a cascade of look-up tables (LUTs). Multiple-output functions for benchmark functions are realized by cascades of LUTs, and the number of LUTs and levels of cascades are...
متن کاملDesign Methods for Multi-Rail Cascades
This paper surveys methods to represent logic functions by cascades. First, a design method for multi-rail cascades with redundant inputs is shown. It uses logic minimization of SOPs (sumof-products expressions) or ESOPs (EXOR sum-of-products expressions) of multiple-valued inputs. Then, a design method for multi-rail cascades with irredundant inputs is shown. It uses functional decompositions ...
متن کاملBDD Representation for Incompletely Specified Multiple-Output Logic Functions and Its Applications to the Design of LUT Cascades
A multiple-output function can be represented by a binary decision diagram for characteristic function (BDD for CF). This paper presents a method to represent multiple-output incompletely specified functions using BDD for CFs. An algorithm to reduce the widths of BDD for CFs is presented. This method is useful for decomposition of incompletely specified multiple-output functions. Experimental r...
متن کاملDigitally Excited Reconfigurable Linear Antenna Array Using Swarm Optimization Algorithms
This paper describes the synthesis of digitally excited pencil/flat top dual beams simultaneously in a linear antenna array constructed of isotropic elements. The objective is to generate a pencil/flat top beam pair using the excitations generated by the evolutionary algorithms. Both the beams share common variable discrete amplitude excitations and differ in variable discrete phase excitations...
متن کامل