Datasheet
PN512 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. 5.2 — 16 June 2016
111352 16 of 137
NXP Semiconductors
PN512
Full NFC Forum-compliant frontend
7.3 FeliCa reader/writer functionality
The FeliCa mode is the general reader/writer to card communication scheme according to
the FeliCa specification. The following diagram describes the communication on a
physical level, the communication overview describes the physical parameters.
The contactless UART of PN512 and a dedicated external host controller are required to
handle the complete FeliCa protocol.
7.3.1 FeliCa framing and coding
To enable the FeliCa communication a 6 byte preamble (00h, 00h, 00h, 00h, 00h, 00h)
and 2 bytes Sync bytes (B2h, 4Dh) are sent to synchronize the receiver.
The following Len byte indicates the length of the sent data bytes plus the LEN byte itself.
The CRC calculation is done according to the FeliCa definitions with the MSB first.
To transmit data on the RF interface, the host controller has to send the Len- and data-
bytes to the PN512's FIFO-buffer. The preamble and the sync bytes are generated by the
PN512 automatically and must not be written to the FIFO by the host controller. The
PN512 performs internally the CRC calculation and adds the result to the data frame.
Example for FeliCa CRC Calculation:
Fig 9. FeliCa reader/writer communication diagram
Table 7. Communication overview for FeliCa reader/writer
Communication
direction
FeliCa FeliCa Higher
transfer speeds
Transfer speed 212 kbit/s 424 kbit/s
PN512 card Modulation on reader side 8-30 % ASK 8-30 % ASK
bit coding Manchester Coding Manchester Coding
Bitlength (64/13.56) s (32/13.56) s
card PN512 Loadmodulation on card side > 12 % ASK > 12 % ASK
bit coding Manchester coding Manchester coding
2. PICC to PCD, > 12 % ASK loadmodulation
Manchester coded, baudrate 212 to 424 kbaud
1. PCD to PICC, 8-30 % ASK
Manchester coded, baudrate 212 to 424 kbaud
001aan214
PN512
FeliCa CARD
(PICC)
Felica READER
(PCD)
Table 8. FeliCa framing and coding
Preamble Sync Len n-Data CRC
00h 00h 00h 00h 00h 00h B2h 4Dh
Table 9. Start value for the CRC Polynomial: (00h), (00h)
Preamble Sync Len 2 Data Bytes CRC
00h 00h 00h 00h 00h 00h B2h 4Dh 03h ABh CDh 90h 35h