There are disclosed a semiconductor device in which a short circuit between an oscillator and a semiconductor substrate is prevented, the semiconductor device being capable of suppressing an increase of fabrication steps, and a method of fabricating the semiconductor device. For example, according to an example embodiment, an apparatus adapted for wireless communication in a wireless network may include a processor. In a second mode of operation the clock generator circuitry 18 generates the memory clock signal mclk following the rising edge of the source clock signal sclk and then using a self-timing delay path 26 to trigger the falling edge of the memory clock signal mclk.