Image forming device, power supply control device

摘要

The subject invention provides an image forming device including a main control section and a signal detection circuit for detecting presence or absence of an external signal supplied to the main control section, and further provided with an interface section for controlling external communication; a main power supply circuit; a power supply control circuit. The signal detection circuit includes a low power mode prohibition circuit for outputting a low power mode prohibition signal for voiding the request for low power consumption with respect to the power supply control circuit or the main power supply circuit while the external signal is supplied to the signal detection circuit. With this arrangement, the present invention provides an image forming device capable of appropriate transition into the low power consumption operation by hardware without use of software.