Patent ID: 7102555

Claim:
An analog interface in an integrated circuit, comprising: an analog-to-digital converter having a differential input; a boundary-scan controller coupled to the analog-to-digital converter; control logic coupling the analog-to-digital converter and the boundary-scan controller; a multiplexer having an input side coupled to a plurality of analog channels and an output side coupled to the differential input of the analog-to-digital converter; data registers coupled to outputs of the analog-to-digital converter; the boundary-scan controller configured to receive test information; the control logic configured to provide a channel select signal as a control signal responsive to the test information; the multiplexer coupled to receive the control signal to select a channel of the plurality of analog channels for outputting a differential analog output from the multiplexer and to the analog-to-digital converter; and the analog-to-digital converter configured to convert the differential analog output into digital information for storing in a register of the data registers.