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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MFRC63002R датащи(PDF) 36 Page - NXP Semiconductors |
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MFRC63002R датащи(HTML) 36 Page - NXP Semiconductors |
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36 / 118 page  MFRC630 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet COMPANY PUBLIC Rev. 3.1 — 6 September 2012 227531 36 of 118 NXP Semiconductors MFRC630 Contactless reader IC During low power card detection the DC levels at the I- and Q-channel mixer outputs are evaluated. This requires that mixers are directly connected to the ADC. This can be configured by setting the bit Rx_ADCmode in register Rcv (38h). 8.6.4 Active antenna concept Two main blocks are implemented in the MFRC630. A digital circuitry, comprising state machines, coder and decoder logic and an analog circuitry with the modulator and antenna drivers, receiver and amplification circuitry. For example, 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. The most important use of this topology is the active antenna concept where the digital and the analog blocks are separated. This opens the possibility to connect e.g. an additional digital block of another MFRC630 device with a single analog antenna front-end. The Table 22 and Table 23 describe the necessary register configuration for the use case active antenna concept. 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 25 “Overview SIGIN/SIGOUT Signal Routing”). This topology supports, that some parts of the analog part of the MFRC630 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. Fig 24. Block diagram of the active Antenna concept Table 22. Register configuration of MFRC630 active antenna concept (DIGITAL) 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 23. Register configuration of MFRC630 active antenna concept (Antenna) 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 001aam307 SIGIN SIGIN SIGOUT SIGOUT READER IC (DIGITAL) READER IC (ANTENNA) |
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