Semiconductor register element

To provide a semiconductor register element being capable of reducing standby power consumption of a CMOS semiconductor integrated circuit. Upon shifting from a standby status to an operating status, firstly the application of input voltage is interrupted from elements other than temporary memory elements to the temporary memory elements. Next, the application of output voltage is interrupted from the temporary memory elements to the elements other than the temporary memory elements. Finally, the supply of source voltage is interrupted to the elements other than the temporary memory elements. In the steps of returning from a standby status to an operating status, firstly the supply of source voltage is resumed to the interrupted elements other than the temporary memory elements. Next, the application of output voltage is resumed from the temporary memory elements to the elements other than the temporary memory elements. Finally, the application of input voltage is resumed from the elements other than the temporary elements to the temporary memory elements.