FORFARANDE FOR TESTNING AV BERARE FORSEDDA MED ETT FLERTAL DIGITALA INTEGRERADE KRETSAR, BERARE FORSEDD MED SADANA KRETSAR, INTEGRERAD KRETS LEMPAD FOR MONTERING PA EN SADAN BERARE OCH TESTANORDNING FOR TESTNING AV SADA

摘要

A method of testing an interconnection function between two integrated circuits which are mounted on a carrier and which are interconnected by data connections, for example a printed wiring board, is disclosed. The integrated circuits are also connected to a serial bus via which test patterns and result patterns can be communicated between a test device which can be connected thereto and the respective integrated circuits. The bus of a preferred embodiment is formed by a so-called I2C bus. In a further elaboration, this set-up can also be used for testing the internal logic circuitry of the integrated circuits. For the testing of the interconnection function, input/output cells with a parallel connection for performing the normal execution function in a transparent mode are provided. They also include series connections for communication test/result patterns by way of a shift register.