| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a composite device system that can decrease a size of a booster circuit in a first device. <P>SOLUTION: A composite device system comprises: a first device 11 including a nonvolatile memory 22 that is rewritable; and a second device 12, connected to the first device 11, configured to supply a power to the first device 11. The second device 12 includes: a power supply circuit 33 configured to stabilize a first power supplied from an external part into a second power that is lower than the first power, and to supply the second power to the first device 11; a communication circuit 31 configured to receive control data sent from the first device 11; and a switch 34 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 11 when the switch is on. The second device 12 receives the control data from the first device 11 by the communication circuit 31 when data is written into the nonvolatile memory 22 so that the switch 34 is turned on and the first power is supplied to the first device 11. <P>COPYRIGHT: (C)2012,JPO&INPIT |
