Patent ID: 8975873
Filing Date: 2015-03-10
Classification: H02J

Abstract:
1. A composite device system comprising: a first device including a nonvolatile memory that is rewritable; and a second device, connected to the first device, configured to supply a power to the first device, the second device comprising: a communication circuit configured to receive control data sent from the first device; and a switch configured to switch between on and off based on the control data, and to supply the first power supplied from the external part to the first device when the switch is on, wherein the second device receives the control data from the first device by the communication circuit when data is written into the nonvolatile memory so that the switch is turned on and the first power is supplied to the first device, and wherein the switch is turned off and power supply to the first device from the switch is stopped when the writing of the data is completed.