Selecting four signals from sixteen inputs

摘要

An apparatus for selecting a plurality of input signals from a plurality of y signals in a device has a switching matrix with a plurality of n to 1 mulitplexers, wherein each n to 1 multiplexer is assigned to a different input set of n of the y signals wherein a subset of less than n input signals of each set of input signals of each of the n to 1 multiplexers is also a subset of input signals of another n to 1 multiplexer.

主权项

1. An apparatus for selecting signals from a plurality of y signals in a device, comprising
a switching matrix receiving y input signals, a plurality of multiplexers coupled with the switching matrix, each multiplexer having n inputs, one or more control inputs, and a single output, wherein each multiplexer receives a set of n of said y signals, a mode register coupled with the switching matrix allowing to program one of a plurality of assignment modes, wherein
in a first assignment mode the switching matrix operates to assign each multiplexer to a different set of n of said y signals, wherein each set of n signals is divided into a plurality of subsets of input signals, wherein one of the subsets of each multiplexer comprises more than one and less than n input signals and is also a subset of input signals of another multiplexer, andin a second assignment mode, the switching matrix assigns an identical set of input signals from said y input signals to all of the plurality of independently controlled multiplexers.