Patent ID: 7180324

Claim:
An electronic device comprising; routing elements coupled to selectively receive signals from either first vertical lines or second vertical lines and to route received signals to rows of a circuitry array of the electronic device; wherein a routing element is configurable, based upon at least one prescribed condition related to redundancy, to provide a normal mode signal pathway from either a first vertical line or from a second vertical line and is also configurable to provide a redundant mode signal pathway from either the first vertical line or the second vertical line, the first and second vertical lines being driven from different rows; and wherein the electronic device is a programmable logic device further comprising: configuration elements controlling functions of the programmable logic device, the configuration elements being programmed by configuration bits loaded into the configuration elements; and switching circuitry coupled to shift configuration bits for configuration elements associated with one row of the array in a normal mode to configuration elements associated with the next row below, such shifting occurring from a bad row to a spare row when at least a portion of the device from the bad row to the spare row is in a redundant mode.