A motor is provided for use in a machine. The CPU unit has a memory with a user access area which is accessible by instruction of user program. The filter employs a novel device that combines flow control, pressure measurement, freeze protection, and anti-siphon features. The sacrificial oxide layer has a surface area equal to the first predetermined surface area, and portions of the sacrificial oxide layer having a surface area equal to the second predetermined surface area. Accordingly, a number of concurrently activated memory blocks, a voltage required to enable a word line and noise may be reduced. In the image copier according to the invention, see-through copying of the bottom side can be suppressed by performing a background correction process after an image is read without blocking a sensor hole of a sensor for detecting the size of the original document from light.