| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent a large difference in accuracy from being caused in transfer sheet transportation speed driven by clock signals formed by the respective oscillation circuits even in a case where a master CPU on an image forming section side and a slave CPU on a sheet transportation section side are driven by the oscillation circuits with different oscillation accuracies. <P>SOLUTION: In the master CPU and the slave CPU that are cascadingly connected to each other, in order to calculate a clock frequency (or period) of the oscillation circuit on the target CPU side, a predetermined time transmitted from the other CPU connected to the target CPU is counted by the clock signal of the target CPU. With reference to the predetermined time, an operation process, such as division of an acquired counter value by the predetermined time, acquires an error of the clock frequency (or period) of the oscillation circuit driving the slave CPU, and corrects the error, thereby improving the accuracy thereof. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
