1. An information processing apparatus that provides a specific function, the information processing apparatus comprising: a non-volatile function program memory to store a function program for providing the specific function; a main memory; and an arithmetic device to read and store the function program from the non-volatile function program memory into the main memory at startup of the information processing apparatus and perform an arithmetic operation based on the function program to execute the function program, wherein when reading and storing the function program from the non-volatile function program memory into the main memory at the startup, the arithmetic device operates at a start frequency set for startup as a clock frequency for accessing the non-volatile function program memory, and wherein after reading and storing the function program from the non-volatile function program memory into the main memory, the arithmetic device operates at a frequency lower than the start frequency as the clock frequency for accessing the non-volatile function program memory.