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CLRC661 Datasheet(PDF) 51 Page - NXP Semiconductors |
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CLRC661 Datasheet(HTML) 51 Page - NXP Semiconductors |
51 / 152 page NXP Semiconductors CLRC661 High performance NFC frontend CLRC661 plus 8.10.3.4 MFAuthent command Command (03h), Parameter1 (Authentication command code 60h or 61h), Parameter2 (block address), Parameter3 (card serial number byte0), Parameter4 (card serial number byte1), Parameter5 (card serial number byte2), Parameter6 (card serial number byte3); This command handles the MIFARE Classic authentication in Reader/Writer mode to ensure a secure communication to any MIFARE Classic card. When the MFAuthent command is active, any FIFO access is blocked. Anyhow if there is access to the FIFO, the bit WrErr in the Error register is set. This command terminates automatically when the MIFARE Classic card is authenticated and the bit MFCrypto1On is set to logic 1. This command does not terminate automatically, when the card does not answer, therefore the timer should be initialized to automatic mode. In this case, beside the bit IdleIRQ the bit TimerIRQ can be used as termination criteria. During authentication processing the bits RxIRQ and TxIRQ are blocked. The Crypto1On shows if the authentication was successful. The Crypto1On is always valid. In case, there is an error during authentication, the bit ProtocolErr in the Error register is set to logic 1 and the bit Crypto1On in register Status2Reg is set to logic 0. 8.10.3.5 AckReq command Command (04h); Performs a Query (Full command must be written into the FIFO); an Ack and a ReqRn command. All answers to the command will be written into the FIFO. The error flag is copied after the answer into the FIFO. This command terminates automatically and the then active state is idle. 8.10.3.6 Receive command Command (05h); The CLRC661 activates the receiver path and waits for any data stream to be received, according to its register settings. The registers must be set before starting this command according to the used protocol and antenna configuration. The correct settings have to be chosen before starting the command. This command terminates automatically when the received data stream ends. This is indicated either by the end of frame pattern or by the length byte depending on the selected framing and speed. Remark: If the bit RxMultiple in the RxModeReg register is set to logic 1, the Receive command does not terminate automatically. It has to be terminated by activating any other command in the CommandReg register (see Section 9.8.1). 8.10.3.7 Transmit command Command (06h); data to transmit The content of the FIFO is transmitted immediately after starting the command. Before transmitting the FIFO, all relevant registers have to be set to transmit data. This command terminates automatically when the FIFO gets empty. It can be terminated by any other command written to the command register. CLRC661 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2021. All rights reserved. Product data sheet Rev. 3.7 — 23 June 2021 COMPANY PUBLIC 456937 51 / 152 |
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