| 摘要 |
Near-field communication (NFC) is effected in a manner that ensures that messages are read. In accordance with one or more embodiments, an apparatus includes a NFC antenna, a NFC tag and a host connected to the NFC tag via both a data communication circuit and a field detection circuit. The NFC tag stores and transmits an NFC data exchange format (NDEF) message via the NFC antenna. The NFC tag includes first and second registers respectively having data indicative of a read status of the NDEF message and data indicative of a last portion/byte of the NDEF message data. When the NDEF message is accessed (e.g., transmitted), the NFC tag sets the data in the first register to indicate that the NDEF message has been read (e.g., sets a bit value). The trigger circuit generates a trigger signal in response to the status, indicating that the NDEF message has been read. |
| 主权项 |
1. An apparatus comprising:
a near-field communication (NFC) protocol tag circuit including an antenna circuit, a first register circuit having configuration data configured and arranged to facilitate remote-field communications via a second protocol that is different than the NFC protocol, and a second register circuit having data indicative of a last accessed byte of the configuration data, the NFC tag circuit being configured and arranged to, using radio frequency energy received from a remote reader circuit,
in response to a NFC protocol radio frequency communication received from the remote reader circuit via the antenna circuit, access the configuration data from the first register and transmit the accessed configuration data via the antenna circuit using the NFC protocol, andbased on the data indicative of the last accessed byte of the configuration data, generate a trigger signal in response to a last byte of the configuration data being accessed; and a host circuit connected to the NFC tag circuit and configured and arranged to
operate in a sleep mode in which the host circuit does not wirelessly communicate via the second protocol,transition from the sleep mode to a wake mode in response to receiving the trigger signal from the NFC tag circuit, andwhile operating in the wake mode, communicate with the reader circuit via radio frequency communications of the second communication protocol. |
