Data Sheet

Product short data sheet

COMPANY PUBLIC

Rev. 3.2 — 20 September 2012

120132 16 of 27

NXP Semiconductors

PN532/C1

Near Field Communication (NFC) controller

7.1.4.3 NFCIP-1 framing and coding

The NFCIP-1 framing and coding in Active and Passive communication modes are

defined in the NFCIP-1 standard: ISO/IEC 18092 or ECMA 340.

7.1.4.4 NFCIP-1 protocol support

The NFCIP-1 protocol is not completely described in this document. For detailed

explanation of the protocol refer to the ISO/IEC 18092 / ECMA340 NFCIP-1 standard.

However the datalink layer is according to the following policy:

• Transaction includes initialization, anticollision methods and data transfer. This

sequence must not be interrupted by another transaction.

• Speed should not be changed during a data transfer

In order not to disturb current infrastructure based on 13.56 MHz general rules to start

NFC communication are defined in the following way:

• Per default NFCIP-1 device is in target mode, meaning its RF field is switched off.

• The RF level detector is active.

• Only if application requires the NFCIP-1 device shall switch to Initiator mode.

• Initiator shall only switch on its RF field if no external RF field is detected by RF Level

detector during a time of TIDT.

• The initiator performs initialization according to the selected mode.