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

Claim 4:
5. A power management integrated circuit (IC) that is included in an accessory and connected to a case with a charging line and a GND line, the accessory operating on electric power, the case being capable of supplying the electric power, the charging line transmitting and receiving a charging signal, the GND line being set to a reference voltage, the power management IC comprising:
a memory storing to a preset first threshold voltage, a preset second threshold voltage, a preset first threshold period, a preset second threshold period, and a preset third threshold period; and
a requested-operation determination circuit that, based on a voltage level of the charging signal relative to the preset first threshold voltage and the preset second threshold voltage and based on a duration time of the voltage level relative to the preset first threshold period, the preset second threshold period, and the preset third threshold period, determines one operation requested of the accessory, the one operation being one of a plurality of operations.