An information processing apparatus includes a clock signal generator unit that generates a clock signal which is variable in frequency. The information processing apparatus also includes a timing information calculator unit that calculates timing information corresponding to frequency information about the clock signal and acquires the frequency information before a variation in the clock signal. The information processing apparatus further includes an information processor unit that executes an information processing operation for a memory at an execution timing which is controlled by the timing information. The clock signal is supplied to the information processor unit as an operating clock signal. The timing information calculator unit determines whether an address of the memory of a previous information processing operation matches with an address of the memory of the information processing operation to produce a determination result and calculates the timing information based on the determination result.