US 12,462,120 B2
Method and apparatus for sustaining a constant time period value for operation and answering by a tag for an NFC transceiver
Thaweesak Thantipwan, Bangkok (TH); Ohmmarin Sathusen, Bangkok (TH); and Tanawat Hongthai, Bangkok (TH)
Assigned to Silicon Craft Technology Public Company Limited (SICT), Bangkok (TH)
Appl. No. 18/570,015
Filed by Silicon Craft Technology Public Company Limited (SICT), Bangkok (TH)
PCT Filed Jul. 16, 2021, PCT No. PCT/IB2021/056424
§ 371(c)(1), (2) Date Dec. 13, 2023,
PCT Pub. No. WO2023/285866, PCT Pub. Date Jan. 19, 2023.
Prior Publication US 2024/0273316 A1, Aug. 15, 2024
Int. Cl. G06K 7/10 (2006.01); H04B 5/77 (2024.01)
CPC G06K 7/10237 (2013.01) [G06K 7/10297 (2013.01); H04B 5/77 (2024.01)] 21 Claims
OG exemplary drawing
 
1. A method for sustaining a constant time period value for operation and answering by a tag for an NFC transceiver, the method comprising:
the NFC transceiver sending an instruction to the tag to cause the tag to start a process for sending one or more answer values at a predetermined time period value;
a time control circuit in the tag started operating for the predetermined time period value or T_period;
when having operated for the predetermined time period value completes, the time control circuit sending a tick and restarting counting automatically;
when the tick is detected by the tag, sending the one or more answer values to the NFC transceiver and the tick to be applied for generating one or more operation indicating signals to cause other one or more other circuits to start periodic operation;
the NFC transceiver processing the acquired one or more answer values;
the NFC transceiver sending next instruction to receive the one or more answer values, sending the next instruction to the tag being performed consecutively and automatically until the NFC transceiver receives required amount of data completely; and
when the NFC transceiver receives the required amount of data completely, the NFC transceiver sending a stopping instruction to the tag to stop the periodic operation and sending the one or more answer values,
wherein a period from sending the next instruction by the NFC transceiver to sending the next one or more answer values by the tag after the tick is detected is period T7,
and wherein the processing of the instruction sent from the NFC transceiver by the tag is completed, and the one or more answer values is ready to be sent to the NFC transceiver always within the period T7 before the next tick is detected from the time control circuit.