US 11,860,706 B2
Accessory, power management IC, and communication system
Satoshi Sugiyama, Kanagawa (JP); and Naoya Arisaka, Tokyo (JP)
Assigned to Sony Semiconductor Solutions Corporation, Kanagawa (JP)
Appl. No. 17/610,838
Filed by Sony Semiconductor Solutions Corporation, Kanagawa (JP)
PCT Filed Mar. 16, 2020, PCT No. PCT/JP2020/011388
§ 371(c)(1), (2) Date Nov. 12, 2021,
PCT Pub. No. WO2020/235195, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 2019-094319 (JP), filed on May 20, 2019.
Prior Publication US 2022/0214739 A1, Jul. 7, 2022
Int. Cl. G06F 1/3212 (2019.01); G06F 1/3246 (2019.01); G06F 1/3296 (2019.01)
CPC G06F 1/3212 (2013.01) [G06F 1/3246 (2013.01); G06F 1/3296 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An accessory that is connectable to a 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, the accessory 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.