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 20 of 137
NXP Semiconductors
PN512
Full NFC Forum-compliant frontend
7.4.3 NFCIP-1 framing and coding
The NFCIP-1 framing and coding in Active and Passive Communication mode is defined
in the NFCIP-1 standard.
7.4.4 NFCIP-1 protocol support
The NFCIP-1 protocol is not completely described in this document. For detailed
explanation of the protocol refer to the NFCIP-1 standard. However the datalink layer is
according to the following policy:
• Speed shall not be changed while continuum data exchange in a transaction.
• Transaction includes initialization and anticollision methods and data exchange (in
continuous way, meaning no interruption by another transaction).
In order not to disturb current infrastructure based on 13.56 MHz general rules to start
NFCIP-1 communication are defined in the following way.
1. Per default NFCIP-1 device is in Target mode meaning its RF field is switched off.
2. The RF level detector is active.
3. Only if application requires the NFCIP-1 device shall switch to Initiator mode.
4. Initiator shall only switch on its RF field if no external RF field is detected by RF Level
detector during a time of TIDT.
5. The initiator performs initialization according to the selected mode.
7.4.5 MIFARE Card operation mode
Table 12. Framing and coding overview
Transfer speed Framing and Coding
106 kbit/s According to the ISO/IEC 14443A/MIFARE scheme
212 kbit/s According to the FeliCa scheme
424 kbit/s According to the FeliCa scheme
Table 13. MIFARE Card operation mode
Communication
direction
ISO/IEC 14443A/
MIFARE
MIFARE Higher transfer speeds
transfer speed 106 kbit/s 212 kbit/s 424 kbit/s
reader/writer
PN512
Modulation on
reader side
100 % ASK 100 % ASK 100 % ASK
bit coding Modified Miller Modified Miller Modified Miller
Bitlength (128/13.56) s (64/13.56) s (32/13.56) s
PN512 reader/
writer
Modulation on
PN512 side
subcarrier load
modulation
subcarrier load
modulation
subcarrier load
modulation
subcarrier
frequency
13.56 MHz/16 13.56 MHz/16 13.56 MHz/16
bit coding Manchester coding BPSK BPSK