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OM25180FDKM Datasheet(PDF) 72 Page - NXP Semiconductors |
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OM25180FDKM Datasheet(HTML) 72 Page - NXP Semiconductors |
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72 / 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 72 of 149 NXP Semiconductors PN5180 High-performance multi-protocol full NFC Forum-compliant frontend 11.8.9 Receiver RX 11.8.9.1 Reader Mode Receiver In Reader Mode, the response of the PICC device is coupled from the PCB antenna to the differential input RXP/RXN. The Reader Mode Receiver extracts this signal by first removing the carrier in passive mixers (direct conversion for I and Q), then filtering and amplifying the baseband signal, and finally converting to digital values with 2 separate ADCs for I and Q channel. Both the I and Q channels have a differential structure which improves the signal quality. Fig 37. Autocall state machine aaa-020625 ReqA/WupA no no no Passive Target A enabled? IDLE READY READY* Send SensF response Frame received entry HALT Yes and Autocoll_state_a** == HALT Yes and Autocoll_state_a** == IDLE ISO14443-3A PICC state machine ACTIVE Passive Target A106 IRQ line is asserted Load Protocol PICC-A106 done RX_IRQ and CARD_ACTIVATED_IRQ are set Passive Target F212/424* IRQ line is asserted Load Protocol PICC-F212 or PICC-F424 done RX_IRQ and CARD_ACTIVATED_IRQ are set *the determined baudrate can be found in the SIGPRO_CONFIG register ** Autocoll_state_a is defined in the register SYSTEM_CONFIG Active Target A106/F212/F424* IRQ line is asserted Load Protocol AT106/AT212/ AT424 done RX_IRQ is set ACTIVE* yes SensF received and Passive Target F enabled SC = 0xFFFF or EE-Value yes yes SensFReq received any other frame received Any CL Error Frame received and no error Active Mode enabled yes no no |
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