Abstract: An arrangement and a method for testing various kinds of electronic equipment, each having an internal bus, during assembly and during subsequent servicing, wherein a plurality of software packages, each storing instructions and data pertinent to the testing and adjustment of a specific kind of equipment are prepared and a computer is connectable in common to the various kinds of equipment via their internal buses for testing any one of the various equipments according to the contents of the appropriate software package.

Abstract: An integrated circuit device for an electronic equipment having an internal bus, the integrated circuit device comprising a digital-to-analog converter for converting a serial digital control signal to a corresponding analog control signal, a plurality of circuits subject to control in response to the analog control signal for performing specific functions, a switch circuit for selecting any one of the plurality of circuits, a switch control circuit for controlling the switch circuit to select any one of the plurality of circuits according to a received selection signal, an analog-to-digital converter for converting an output signal from the switch circuit into a corresponding digital signal, and a bus interface circuit for sending the serial digital control signal from the internal bus to the digital-to-analog converter and for sending the selection signal to the switch control circuit.

Abstract: An integrated circuit device for an electronic equipment having an internal bus, the integrated circuit device comprising a plurality of input terminals, a switch circuit connected to the plurality of input terminals for selecting any one of a respective plurality of input signals via the plurality of input terminals, a switch control circuit for controlling the switch circuit to select any one of the input signals in dependence on a selection signal, an analog-to-digital converter for converting the selected input signal from the switch circuit into a corresponding serial digital signal, and a bus interface circuit connected to the internal bus for sending the serial digital signal from the analog-to-digital converter to the internal bus and for sending the selection signal from the internal bus to the switch control circuit.