Communication Method and Communication System
First Claim
1. A communication method using a semiconductor device having a wireless function,the communication method comprising the step of:
- restarting a command sequence from a middle of the command sequence when supply of a power supply voltage is temporarily stopped,wherein the command sequence comprises the step of;
holding data in a nonvolatile storage circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
A command sequence is restarted from the middle even when supply of power supply voltage to an internal circuit in a wireless tag is temporarily stopped (a power flicker occurs). A register or a cache memory included in a signal processing circuit in the wireless tag continues to retain data even after the supply of power supply voltage is stopped. After the power flicker occurs, the signal processing circuit in the wireless tag is returned to the state before the supply of power supply voltage is stopped and can restart signal processing. Consequently, the command sequence can be restarted from the middle.
-
Citations
28 Claims
-
1. A communication method using a semiconductor device having a wireless function,
the communication method comprising the step of: -
restarting a command sequence from a middle of the command sequence when supply of a power supply voltage is temporarily stopped, wherein the command sequence comprises the step of; holding data in a nonvolatile storage circuit. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A communication method using a semiconductor device having a wireless function, wherein the semiconductor device comprises a signal processing circuit including a flip-flop and a nonvolatile storage circuit,
the communication method comprising the step of: -
restarting a command sequence from a middle of the command sequence when supply of a power supply voltage is temporarily stopped, wherein the command sequence comprises the steps of; receiving a command by the semiconductor device; performing a signal processing on the basis of the command in the signal processing circuit; holding data in the nonvolatile storage circuit, wherein the data is retained in the flip-flop; and transmitting a response from the semiconductor device by modulating a first electromagnetic wave, wherein the response is based on the result of the signal processing. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A communication method using a semiconductor device having a wireless function, wherein the semiconductor device comprises a signal processing circuit including a flip-flop and a nonvolatile storage circuit,
the command sequence comprising the step of: -
holding data in a nonvolatile storage circuit, the communication method comprising the steps of; restarting to generate a power supply voltage so that the command sequence restarts from a middle of the command sequence when the command sequence is temporarily stopped, inputting data retained in the nonvolatile storage circuit to the flip-flop; performing signal processing in the signal processing circuit by using the data; transmitting a response based on the result of the signal processing to the reader/writer by modulation of the electromagnetic wave in the semiconductor device; receiving the response by the reader/writer; and transmitting a command based on the response by modulation of the electromagnetic wave in the reader/writer. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
-
-
24. A communication system comprising:
-
a semiconductor device for performing wireless communication, wherein the semiconductor device includes a signal processing circuit for performing signal processing on the basis of a command, wherein the signal processing circuit includes a register, and wherein the register includes plural sets of a flip-flop and a nonvolatile storage circuit for storing data retained in the flip-flop. - View Dependent Claims (25, 26, 27, 28)
-
Specification