Patent ID: 11860706
Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 12:
13. A communication system comprising:
a case that is capable of supplying electric power;
an accessory that operates on the electric power; and
a power management integrated circuit (IC) that is included in the accessory and connected to the case with a charging line and a GND line, the charging line transmitting and receiving a charging signal, the GND line being set to a reference voltage,
wherein the power management IC includes a requested-operation determination circuit that, based on a voltage level of the charging signal relative to a preset first threshold voltage and a preset second threshold voltage and based on a duration time of the voltage level relative to a preset first threshold period, a preset second threshold period, and a preset third threshold period, determines one operation requested of the accessory, the one operation being one of a plurality of operations.