Importance

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Abstract

A test mode control circuit for reconfiguring a device pin of an integrated circuit chip which is initially configured in a test mode includes an input register for applying trim/configuring data to one or more components on an integrated circuit chip; a device pin; an output register for receiving output data from an integrated circuit on an integrated circuit chip which integrated circuit has had one or more of its elements trimmed/reconfigured; an I/O logic circuit for controlling the device pin to operate as a test pin to selectively deliver the trim/configuring data to the input register and receive output data form the output register; a programmable ray including a plurality of logic state elements for permanently mapping a selected set of the trim/configuring data from the input register, the programmable array including a test bit; and a switching system for applying the trim/configuring data to the one or more components on the integrated circuit when the test bit is in a first, test mode and for applying the permanently mapped trim/configuring data to the components in a second, normal mode.

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First Claim