US Patent No. 10,599,601

SINGLE-WIRE BUS (SUBUS) SLAVE CIRCUIT AND RELATED APPARATUS


Patent No. 10,599,601
Issue Date March 24, 2020
Title Single-wire Bus (subus) Slave Circuit And Related Apparatus
Inventorship Christopher Truong Ngo, Queen Creek, AZ (US)
Alexander Wayne Hietala, Phoenix, AZ (US)
Puneet Paresh Nipunage, Phoenix, AZ (US)
Assignee Qorvo US, Inc., Greensboro, NC (US)

Claim of US Patent No. 10,599,601

1. A single-wire bus (SuBUS) slave circuit comprising:a front-end circuit coupled to a SuBUS and configured to receive a start-of-sequence (SOS) training sequence corresponding to a synchronization interval and preceding a SuBUS telegram corresponding to a predefined SuBUS operation; and
a digital control circuit coupled to the front-end circuit and configured to:
count a plurality of free-running oscillator (FRO) pulses during the synchronization interval;
determine a slave FRO count during a predefined slave task interval based on the plurality of FRO pulses counted during the synchronization interval;
control the front-end circuit to enable a slave task independent of the predefined SuBUS operation during the predefined slave task interval; and
control the front-end circuit to disable the slave task in response to the slave FRO count indicating an expiration of the predefined slave task interval.