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OM25180FDKM Datasheet(PDF) 59 Page - NXP Semiconductors |
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OM25180FDKM Datasheet(HTML) 59 Page - NXP Semiconductors |
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59 / 149 page  PN5180 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. Product data sheet COMPANY PUBLIC Rev. 3.0 — 7 October 2016 240930 59 of 149 NXP Semiconductors PN5180 High-performance multi-protocol full NFC Forum-compliant frontend Passive communication mode: Passive communication mode means that the target answers to an initiator command in a load modulation scheme. The initiator is active (powered) to generate the RF field. A dedicated host controller firmware is required to handle the NFCIP-1 protocol. Note: Transfer Speeds above 424 kbit/s are not defined in the NFCIP-1 standard. NFCIP-1 protocol support: The NFCIP-1 protocol is not described in this document. The PN5180 does not implement any of the high-level protocol functions. These higher-level protocol functions need to be provided by the host. For detailed explanation of the protocol, refer to the NFCIP-1 standard. However the datalink layer is according to the following policy: • Speed shall not be changed while continuous data exchange in a transaction. • Transaction includes initialization, anticollision methods and data exchange (in continuous way, meaning no interruption by another transaction). In order not to disturb current infrastructure based on 13.56 MHz, the following general rules to start an NFCIP-1 communication are defined: 1. Per default, an NFCIP-1 device is in Target mode - meaning its RF field is switched off. 2. The RF level detector is active. 3. Only if it is required by the application the NFCIP-1 device shall switch to Initiator mode. Fig 27. Passive communication mode Table 58. Communication overview for passive communication mode Communication direction 106 kbit/s 212 kbit/s 424 kbit/s Initiator Target According to ISO/IEC 14443 A 100 % ASK, Modified Miller Coded According to FeliCa, 8 % to 30 % ASK Manchester Coded Target Initiator According to ISO/IEC 14443 A @106 kbit modified Miller Coded According to FeliCa, > 14 % ASK Manchester Coded host NFC INITIATOR powered to generate RF field 1. initiator starts communication at selected transfer speed 2. targets answers using load modulated data at the same transfer speed host NFC TARGET powered for digital processing 001aan217 |
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