A method of and an arrangement for automatically measuring electric connections of electronic circuit arrangements mounted on printed circuit boards

摘要

A method of and an arrangement for determining electric connections at a printed circuit board between boundary-scan compliant circuit terminals of one or more boundary-scan compliant devices of an electronic circuit arrangement. An electronic processing unit retrieves boundary-scan properties of the or each boundary-scan compliant device and a list comprising boundary-scan cells operable as a driver and/or sensor. Based on this list, a boundary-scan cell connected to a circuit terminal is operated as a driver and outputs data at the circuit terminal, and at least one other boundary-scan cell connected to an other circuit terminal is operated as a sensor. The at least one other boundary-scan cell operated as a sensor senses data received at its circuit terminal and latches the sensed data into a boundary-scan register. Data from the boundary-scan register, comprising the driver and sensor data, is stored in a storage device. The steps of operating boundary-scan cells as driver and sensor are repeated for a plurality of cells. The data stored are analyzed for determining electric connections between circuit terminals at the printed circuit board. A result of the analysis of the determined connections between circuit terminals on the printed circuit board is presented.