Method and apparatus for setting a current of an output driver for the

Abstract

In a system comprising a current controlling device and a plurality of signal lines coupled to the current controlling device, wherein the current controlling device has an output driver including a register, an improved method for setting a current of the output driver for at least one of the plurality of signal lines. The improved method determines a reference register-setting for the register of the current controlling device. The reference register-setting corresponds to a reference voltage for at least one of the plurality of signal lines. A target register-setting is then determined for the register based on the reference register-setting. The target register-setting corresponds to a target voltage for at least one of the plurality of signal lines, wherein the target voltage produces an appropriate swing about the reference voltage. An operational register-setting is then determined for the register based on the target register-setting. The current of the output driver for at least one of the plurality of signal lines is then set based on the operational register-setting so that a swing about the reference voltage is optimal.