Apparatus and method for testing semiconductor integrated circuit
AssigneeMitsubishi Denki Kabushiki Kaisha and Ryoden Semiconductor System Engineering Corporation
InventorsHisaya Mori, Shinji Yamada, Teruhiko Funakura
Life of this patent
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Abstract
There are provided a test apparatus and a test method for testing a semiconductor integrated circuit which facilitate control of a BOST device and improve the versatility of the BOST device. There is provided an interface for exchanging signals between a BOST device and an external controller. A test control signal and a test result analysis signal are exchanged by means of the interface, thus effecting a test and analysis of the test.
Claims7
An apparatus for testing a semiconductor integrated circuit, the semiconductor integrated circuit including an analog-to-digital converter circuit for converting an analog signal into a digital signal and a digital-to-analog converter circuit for converting a digital signal into an analog signal, the apparatus comprising:
- a test circuit board for testing the semiconductor integrated circuit, by means of exchanging signals with the semiconductor integrated circuit;
- a test ancillary device which is disposed in the vicinity of the test circuit board and is connected to the test circuit board;
- and
- an external controller which is connected to the test ancillary device and has a CPU;
- wherein the test ancillary device comprises an interface for exchanging a signal with the CPU of the external controller;
- a data circuit which produces a digital test signal on the basis of a signal output from the CPU byway of the interface and supplies the digital test signal to the digital-to-analog converter circuit of the semiconductor integrated circuit;
- a digital-to-analog converter circuit for test purpose which converts the digital test signal output from the data circuit into an analog test signal and supplies the analog test signal to the analog-to-digital converter circuit of the semiconductor integrated circuit;
- an analog-to-digital converter circuit for test purpose which converts, into a digital test output, an analog test output from the digital-to-analog converter circuit of the semiconductor integrated circuit;
- measured data memory for storing a digital test output from the analog-to-digital converter circuit of the semiconductor integrated circuit and a digital test output from the analog-to-digital converter circuit for test purpose;
- and
- an analysis section for analyzing the digital test outputs stored in the measured data memory in response to a control signal output from the CPU of the external controller, and supplying the result of the analysis to the external controller by way of the interface.
An apparatus for testing a semiconductor integrated circuit, the semiconductor integrated circuit including an analog-to-digital converter circuit for converting an analog signal into a digital signal and a digital-to-analog converter circuit for converting a digital signal into an analog signal, the apparatus comprising:
- a test circuit board for testing the semiconductor integrated circuit, by means of exchanging signals with the semiconductor integrated circuit;
- a test ancillary device which is disposed in the vicinity of the test circuit board and is connected to the test circuit board;
- and
- an external controller which is connected to the test ancillary device and produces and outputs a signal waveform from a clock signal and a test pattern signal in accordance with a test program;
- wherein the test ancillary device comprises an interface for exchanging a signal with the external controller;
- a data circuit which produces a digital test signal on the basis of the signal waveform output received by way of the interface and supplies the digital test signal to the digital-to-analog converter circuit of the semiconductor integrated circuit;
- a digital-to-analog converter circuit for test purpose which converts the digital test signal output from the data circuit into an analog test signal and supplies the analog test signal to the analog-to-digital converter circuit of the semiconductor integrated circuit;
- an analog-to-digital converter circuit for test purpose which converts, into a digital test output, an analog test output from the digital-to-analog converter circuit of the semiconductor integrated circuit;
- measured data memory for storing a digital test output from the analog-to-digital converter circuit of the semiconductor integrated circuit and a digital test output from the analog-to-digital converter circuit for test purpose;
- and
- an analysis section for analyzing the digital test outputs stored in the measured data memory, and supplying the result of the analysis to the external controller by way of the interface;
- wherein the external controller renders a determination on the result of the analysis.
An apparatus for testing a semiconductor integrated circuit, the semiconductor integrated circuit including an analog-to-digital converter circuit for converting an analog signal into a digital signal and a digital-to-analog converter circuit for converting a digital signal into an analog signal, the apparatus comprising:
- a test circuit board for testing the semiconductor integrated circuit, by means of exchanging signals with the semiconductor integrated circuit;
- a test ancillary device which is disposed in the vicinity of the test circuit board and is connected to the test circuit board;
- and
- an external controller which is connected to the test ancillary device;
- wherein the test ancillary device comprises a communications scheme conversion module which can communicate with the external controller by means of a plurality of communications schemes and converts the communications schemes into a custom-made bus scheme in the test ancillary device;
- a data circuit which produces a digital test signal and supplies the digital test signal to the digital-to-analog converter circuit of the semiconductor integrated circuit;
- a digital-to-analog converter circuit for test purpose which converts the digital test signal output from the data circuit into an analog test signal and supplies the analog test signal to the analog-to-digital converter circuit of the semiconductor integrated circuit;
- an analog-to-digital converter circuit for test purpose which converts, into a digital test output, an analog test output from the digital-to-analog converter circuit of the semiconductor integrated circuit;
- measured data memory for storing a digital test output from the analog-to-digital converter circuit of the semiconductor integrated circuit and a digital test output from the analog-to-digital converter circuit for test purpose;
- and
- an analysis section for analyzing the digital test outputs stored in the measured data memory, and supplying the result of the analysis to the external controller.
Dependencies are inferred from the claim text.