公开(公告)号：US10592439B2

公开(公告)日：2020-03-17

申请号：US16386321

申请日：2019-04-17

Applicant: ARM Limited

Inventor： Andrew David Tune ,  Peter Andrew Riocreux ,  Alessandro Grande

IPC: G06F13/14

Abstract: Arbitrating circuitry arbitrates between a plurality of inputs and a selection of at least one of said plurality of inputs. The arbitrating circuitry includes an array of interconnected arbiter devices operating with respect to a set of Q inputs. The array comprises M sub-levels with at least a first sub-level having T arbiter devices each operating with respect to U inputs, where Q=UM and Q=TU. For each sub-level other than a first sub-level, each arbiter device in a sub-level receives as input requests signals indicating an arbitration outcome for two or more arbiter devices in a preceding sub-level and arbitrates between those input requests.

公开(公告)号：US10303624B2

公开(公告)日：2019-05-28

申请号：US15273932

申请日：2016-09-23

Applicant: ARM LIMITED

Inventor： Andrew David Tune ,  Peter Andrew Riocreux ,  Alessandro Grande

IPC: H04L12/937 ,  G06F13/14

Abstract: Arbitrating and multiplexing circuitry for performing an arbitration between a plurality of inputs and a selection of at least one of said plurality of inputs to provide an output comprises arbitrating tree circuitry having X arbitrating levels, where X is an integer greater than one; and multiplexing tree circuitry having Y multiplexing levels, where Y is an integer greater than one; wherein (i) said Y multiplexing levels comprise a first set of said multiplexing levels upstream of a second set of said multiplexing levels; (ii) said first set of said multiplexing levels is configured to operate in parallel with at least some of said X arbitrating levels, whereby said first set of multiplexing levels is configured to perform a partial selection in parallel with said arbitration performed by said X arbitrating levels; and (iii) said second set of said multiplexing levels is configured to operate in series with said X arbitrating levels, whereby said second set of multiplexing levels completes said selection to provide said output following completion of and in dependence upon said arbitration.