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SL3S1203FUF датащи(PDF) 9 Page - NXP Semiconductors |
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SL3S1203FUF датащи(HTML) 9 Page - NXP Semiconductors |
9 / 22 page SL3S1203_1213_SDS All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product short data sheet PUBLIC Rev. 3.2 — 9 November 2010 198732 9 of 22 NXP Semiconductors SL3S1203_1213 UCODE G2iL and G2iL+ 11. Functional description 11.1 Air interface standards The UCODE G2iL fully supports all parts of the "Specification for RFID Air Interface EPCglobal, EPCTM Radio-Frequency Identity Protocols, Class-1 Generation-2 UHF RFID, Protocol for Communications at 860 MHz to 960 MHz, Version 1.2.0". 11.2 Power transfer The interrogator provides an RF field that powers the tag, equipped with a UCODE G2iL. The antenna transforms the impedance of free space to the chip input impedance in order to get the maximum possible power for the G2iL on the tag. The G2iL+ can also be supplied externally. The RF field, which is oscillating on the operating frequency provided by the interrogator, is rectified to provide a smoothed DC voltage to the analog and digital modules of the IC. The antenna that is attached to the chip may use a DC connection between the two antenna pads. Therefore the G2iL also enables loop antenna design. Possible examples of supported antenna structures can be found in the reference antenna design guide. 11.3 Data transfer 11.3.1 Reader to tag Link An interrogator transmits information to the UCODE G2iL by modulating an UHF RF signal. The G2iL receives both information and operating energy from this RF signal. Tags are passive, meaning that they receive all of their operating energy from the interrogator's RF waveform. In order to further improve the read range the UCODE G2iL can be externally supplied as well so the energy to operate the chip does not need to be transmitted by the reader. An interrogator is using a fixed modulation and data rate for the duration of at least one inventory round. It communicates to the G2iL by modulating an RF carrier using DSB-ASK with PIE encoding. For further details refer to Section 16, Ref. 1. Interrogator-to-tag (R=>T) communications. 11.3.2 Tag to reader Link An interrogator receives information from a G2iL by transmitting an unmodulated RF carrier and listening for a backscattered reply. The G2iL backscatters by switching the reflection coefficient of its antenna between two states in accordance with the data being sent. For further details refer to Section 16, Ref. 1, chapter 6.3.1.3. The UCODE G2iL communicates information by backscatter-modulating the amplitude and/or phase of the RF carrier. Interrogators shall be capable of demodulating either demodulation type. The encoding format, selected in response to interrogator commands, is either FM0 baseband or Miller-modulated subcarrier. |
Аналогичный номер детали - SL3S1203FUF |
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Аналогичное описание - SL3S1203FUF |
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