082733

© NXP B.V. 2007. All rights reserved.

Product short data sheet

Rev. 3.3 — 13 June 2007

12 of 22

NXP Semiconductors

PN511

Transmission Module

8.1.2 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 PN511 and a dedicated external host controller are required to

handle the complete FeliCa protocol.

8.1.2.1

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 PN511's FIFO buffer. The preamble and the sync bytes are generated by the

PN511 automatically and must not be written to the FIFO by the host controller. The

PN511 performs internally the CRC calculation and adds the result to the data frame.

Example for FeliCa CRC Calculation:

Fig 7.

FeliCa reader/writer Communication Diagram

Table 6.

Communication overview for FeliCa reader/writer

Communication

direction

FeliCa

FeliCa Higher

transfer speeds

Transfer speed

212 kbit/s

424 kbit/s

PN511

→ card

Modulation on reader side

8-30% ASK

8-30% ASK

bit coding

Manchester Coding

Manchester Coding

Bitlength

(64/13.56)

μs

(32/13.56)

μs

card

→ PN511

Loadmodulation on card side

>12% ASK

>12% ASK

bit coding

Manchester coding

Manchester coding

FeliCa Reader

(PCD)

PN511

FeliCa Card

(PICC)

1. PCD to PICC 8-30 % ASK

,Manchester Coded,

baudrate 212 to 424 kbaud

2. PICC to PCD, >12 % ASK Loadmodulation

,

Manchester Coded,

baudrate 212 to 424 kbaud

Table 7.

FeliCa framing and coding

Preamble

Sync

Len

n-Data

CRC

00h

00h

00h

00h

00h

00h

B2h

4Dh

Table 8.

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