COUNTING CIRCUIT FOR CONTROLLING AN OFF-CHIP DRIVER AND METHOD OF CHANGING AN OUTPUT CURRENT VALUE OF THE OFF-CHIP DRIVER USING THE SAME

摘要

Provided is a counting circuit for controlling an off-chip driver and method of changing a DC output current value of the off-chip driver using the same in accordance with variations of processing characteristics with PMOS and NMOS in the state of wafer level. The counting circuit for controlling the off-chip driver includes: pluralities of latch circuits counting to generate pluralities of off-chip driving control signals; pluralities of fuse blocks generating set and reset input signals to vary initial values of the off-chip driving control signals; and pluralities of initial value modifying circuit varying the initial value of the off-chip driving control signals in response to the set and reset input signals.