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MFRC522 数据表(PDF) 83 Page - NXP Semiconductors |
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MFRC522 数据表(HTML) 83 Page - NXP Semiconductors |
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83 / 96 page  MFRC522_33 © NXP B.V. 2009. All rights reserved. Product data sheet PUBLIC Rev. 3 — 26 October 2009 112133 83 of 96 NXP Semiconductors MFRC522 Contactless reader IC 16.1.3.4 Example: Output test signals RxActive and TxActive Figure 31 shows the RxActive and TxActive test signals relating to RF communication. The AnalogTestReg register is set to CDh. • At 106 kBd, RxActive is HIGH during data bits, parity and CRC reception. Start bits are not included • At 106 kBd, TxActive is HIGH during start bits, data bits, parity and CRC transmission • At 212 kBd, 424 kBd and 848 kBd, RxActive is HIGH during data bits and CRC reception. Start bits are not included • At 212 kBd, 424 kBd and 848 kBd, TxActive is HIGH during data bits and CRC transmission (1) RxActive (2 V/div) on pin AUX1. (2) TxActive (2 V/div) on pin AUX2. (3) RF field. Fig 31. Output RxActive on pin AUX1 and TxActive on pin AUX2 10 µs/div 001aak600 (1) (2) (3) |
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