Patent ID: 7124325

Claim:
A method for trimming interface devices, which comprises: providing a semiconductor device having a plurality of interface devices and providing each one of the plurality of interface devices with a settable control element; providing a test apparatus having a current source; connecting the current source in the test apparatus to an interface connection on the semiconductor device, the interface connection being connected to one of the plurality of interface devices; controlling a measurement current produced by the current source and setting the control element of the one of the plurality of interface devices to an initial value; providing a trimming unit in the semiconductor device; using the trimming unit to acquire a measurement voltage produced by the measurement current in the one of the plurality of interface devices; using the trimming unit to compare the measurement voltage with a nominal voltage; based on a difference between the measurement voltage and the nominal voltage, setting the control element of the one of the plurality of interface devices to a trimming value at which the measurement voltage matches the nominal voltage; and acquiring the trimming value for the control element of the one of the plurality of interface devices.