Arrangement for testing digital circuit devices having bidirectional outputs

摘要

An arrangement is disclosed that is added to digital circuit device for providing a way of easily verifying that the device's input and output circuits are operating and connected properly. The arrangement implements a test mode in which a simple exercising sequence is placed on any single input of a defined sequential group of device pins. A resultant output can be observed on the next occurring output and all subsequent outputs of the defined sequential group.