| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a data processing system capable of synchronizing the operation of an external data processor or a terminal device with a function reducing power consumption during stand-by by releasing an energy saving mode in the case of receiving a power-on state notification instruction and shifting to the energy saving mode when a timer is subjected to timeout. SOLUTION: When a power-on state notification instruction is received (201 YES), an on duration timer is stopped (203), and a prescribed clock value is set to the on duration timer (204). Here, the clock value set to the on duration timer is set to a value that is slightly longer than a clock value set to a notification instruction transmission timer. Next, a power supply controlling part is commanded so as to release an energy saving mode (205), and the on duration timer is started (206). When the on duration timer is subjected to timeout, the power supply controlling part is commanded so as to shift to the energy saving mode (207) and the on duration timer is stopped (208).</p> |
