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OM25180FDKM Datasheet(PDF) 54 Page - NXP Semiconductors |
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OM25180FDKM Datasheet(HTML) 54 Page - NXP Semiconductors |
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54 / 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 54 of 149 NXP Semiconductors PN5180 High-performance multi-protocol full NFC Forum-compliant frontend The PN5180 needs to be connected to a host which implements the FeliCa protocol. Multiple reception cycles (RxMultiple): For FeliCa timeslot handling in PCD mode, PN5180 implements multiple reception cycles. The feature is enabled by setting the control bit RX_MULTIPLE_ENABLE in the register TRANSCEIVE_CONTROL_REG in combination with the transceive state machine. Unlike for normal operation, the receiver is enabled again after a reception is finished. As there is only one receive buffer available, but several responses are expected, the buffer is split into sub buffers of 32 byte length. Hence, the maximum number of responses which can be handled is limited to 8. As the maximum length defined for a FeliCa response is 20 bytes, the buffer size defined does fulfill the requirements for that use-case. The first data frame received is copied onto buffer address 0. The subsequent frames are copied to the buffer address 32 * NumberOfReceivedFrames. The maximum number of data bytes allowed per frame is limited to 28. All bytes in the buffer between the payload and the status byte are uninitialized and therefore invalid. The firmware on the host shall not use these bytes. The last word of the sub buffer (position 28 to 31) contains a status word. The status word contains the number of received bytes (may vary from the FeliCa length in case of an error), the CLError flag indicating any error in the reception (which is a combination of 3 individual error flags DATA_INTEGRITY_ERROR || PROTOCOL_ERROR || COLLISION_DETECTED) the individual error flags and the LenError flag indicating an incorrect length byte (either length byte is greater than 28 or the number of received bytes is shorter than indicated by the length byte). All unused bits (RFU) are masked to 0. Table 54. Communication for FeliCa reader/writer Communication direction Signal type Transfer speed FeliCa FeliCa higher transfer speeds 212 kbit/s 424 kbit/s Reader to card (send data from the PN5180 to a card) fc = 13.56 MHz reader side modulation 8 % to 30 % ASK 8 % to 30 % ASK bit encoding Manchester encoding Manchester encoding bit rate fc/64 fc/32 Card to reader (PN5180 receives data from a card) card side modulation Load modulation, Load modulation, bit encoding Manchester encoding Manchester encoding Fig 23. RxMultiple data format aaa-009166 PayLoad Status 32 byte XXX RFU [31:24] RFU [23:16] Len [4:0] RFU [15:13] RFU [7:5] 4 byte |
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