To calibrate an electronic circuit, a calibration controller tests the electronic circuit with an initial separate read check allowing for a read delay and with an initial separate write check allowing for a write delay. The calibration controller, responsive to passing the initial read check and the initial write check, for each condition of a range of conditions, iteratively performs a write test with the write delay concurrent with a read test with the read delay on the electronic circuit over the range of conditions while simultaneously adjusting the write delay and adjusting the read delay for each iteration until one or more of a read edge and a write edge are detected.