ELECTRONIC EQUIPMENT AND SYSTEM AND POWER SOURCE CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide electronic equipment, a system, and a power source control method capable of independently turning off the power source of a module. SOLUTION: This radio sub-system part 7 is provided with a controller 32 for transmitting and receiving control information with a main system 8 side, a constant voltage outputting circuit 33 for supplying a constant voltage power source, an RF module 34 for performing radio communication, and a switch 35 for forcibly turning off power source supply to the RF module 34. The constant voltage outputting circuit 33 turns on/off the power source supply to the RF module 34 according to the signal situation of the signal of a C signal line C1 from the controller 32. Also, it is possible to turn off the power source supply to the RF module 34 without depending on the power source state of the main system 8 by turning off the switch 35.