Systems and methods for testing tri-state bus drivers

摘要

Systems and methods are provided to test tri-state bus drivers An embodiment of a system includes a tri-state bus to be tested, and at least one tri-state driver connected to the tri-state bus. Either a pull-up driver test circuitry or a pull-down driver test circuitry is connected to the tri-state bus to be tested, and enable the testing of the tri-state driver. An embodiment of a method for testing tri-state bus drivers comprises: selecting the tri-state bus to be tested and performing a tri-state test on the tri-state bus to be tested; switching off enable signals for all drivers on the tri-state bus, forcing the tri-state bus to a first value; setting all driver data inputs to a second value different than the first value, and determining if the first value remains on the tri-state bus.