US 8,542,032 B1 · Integrated circuits with interconnect selection circuitry

Abstract

Integrated circuits such as programmable integrated circuits may include programmable logic regions that can be configured to perform custom user functions. The programmable logic regions may produce output signals. The integrated circuit may include interconnects that route selected output signals throughout the integrated circuit. The integrated circuit may include output selection circuitry having output selection and interconnect selection stages. The output selection circuitry may be configured to select which of the output signals produced by the programmable logic regions are provided to the interconnects for routing. The interconnect selection stage may be formed using multiplexing circuits or tristate drivers. Logic design system computing equipment may be used to generate configuration data that can be used to program the output selection circuitry to reduce crosstalk by routing signals away from critical interconnects or by double-driving critical interconnects.

Claims21

Dependent claims

An integrated circuit comprising:

at least first and second interconnects;
circuitry including a plurality of logic regions that produce output signals;
a first selection stage circuitry that receives the output signals and selects at least two output signals from the output signals;
a second selection stage circuitry that receives the at least two output signals, wherein the second selection stage circuitry provides a first output signal of the at least two output signals to the first interconnect and provides a second output signal of the at least two output signals to the second interconnect in a first configuration mode, and wherein the second selection stage circuitry provides the second output signal to the first interconnect and provides the first output signal to the second interconnect in a second configuration mode;
and
an input selection circuit that provides a plurality of input signals to the plurality of logic regions of the circuitry.

3 more elements

Dependencies are inferred from the claim text.

Integrated circuits with interconnect selection circuitry

Life of this patent

Integrated circuits with interconnect selection circuitry

Life of this patent

Abstract

Claims21