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CLRC663 Datasheet(PDF) 43 Page - NXP Semiconductors |
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CLRC663 Datasheet(HTML) 43 Page - NXP Semiconductors |
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43 / 177 page  NXP Semiconductors CLRC663 High performance multi-protocol NFC frontend CLRC663 and CLRC663 plus 001aam307 SIGIN SIGIN SIGOUT SIGOUT READER IC (DIGITAL) READER IC (ANTENNA) Figure 29. Block diagram of the active Antenna concept The Table 33 and Table 34 describe the necessary register configuration for the use case active antenna concept. Register Value (binary) Description SigOut.SigOutSel 0100 TxEnvelope Rcv.SigInSel 10 11 Receive over SigIn (ISO/IEC14443A) Receive over SigIn (Generic Code) DrvCon.TxSel 00 Low (idle) Table 33. Register configuration of CLRC663 active antenna concept (DIGITAL) Register Value (binary) Description SigOut.SigOutSel 0110 0111 Generic Code (Manchester) Manchester with Subcarrier (ISO/IEC14443A) Rcv.SigInSel 01 Internal DrvCon.TxSel 10 External (SigIn) RxCtrl.RxMultiple 1 RxMultiple on Table 34. Register configuration of CLRC663 active antenna concept (Antenna) The interface between these two blocks can be configured in the way, that the interfacing signals may be routed to the pins SIGIN and SIGOUT (see Figure 30). This topology supports, that some parts of the analog part of the CLRC663 may be connected to the digital part of another device. The switch SigOutSel in registerSigOut can be used to measure signals. This is especially important during the design-in phase or for test purposes to check the transmitted and received data. However, the most important use of SIGIN/SIGOUT pins is the active antenna concept. An external active antenna circuit can be connected to the digital circuit of the CLRC663. SigOutSel has to be configured in that way that the signal of the internal Miller Coder is sent to SIGOUT pin (SigOutSel = 4). SigInSel has to be configured to receive Manchester signal with subcarrier from SIGIN pin (SigInSel = 1). It is possible, to connect a passive antenna to pins TX1, TX2 and RX (via the appropriate filter and matching circuit) and at the same time an active antenna to the pins SIGOUT and SIGIN. In this configuration, two RF- parts may be driven (one after another) by a single host processor. CLRC663 All information provided in this document is subject to legal disclaimers. © 2024 NXP B.V. All rights reserved. Product data sheet Rev. 5.3 — 3 January 2024 43 / 177 |
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