Patent ID: 7701787

Claim:
A memory controller for controlling a memory, comprising: a pad, coupled to the memory, for outputting an output signal to the memory according to a signal value of the memory controller; a voltage pull-up device, coupled to the pad, comprising a first N type transistor and for pulling up a voltage level on the pad according to the signal value; a voltage pull-down device, coupled to the pad, comprising a second N type transistor and for pulling down the voltage level on the pad according to the signal value; and a first pre-driver coupled to the voltage pull-up device, for outputting a first pre-driver signal to the voltage pull-up device according to the signal value; wherein the voltage level on the pad is pulled up to a predetermined value according to a transmission standard, where a first power supply voltage utilized by the first pre-driver approaches a value equal to the predetermined value plus a threshold voltage of the first N type transistor.