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 15 of 137
NXP Semiconductors
PN512
Full NFC Forum-compliant frontend
The PN512’s contactless UART and dedicated external host must manage the complete
ISO/IEC 14443 A/MIFARE protocol. Figure 8
shows the data coding and framing
according to ISO/IEC 14443 A/MIFARE.
The internal CRC coprocessor calculates the CRC value based on ISO/IEC 14443 A
part 3 and handles parity generation internally according to the transfer speed. Automatic
parity generation can be switched off using the ManualRCVReg register’s ParityDisable
bit.
7.2 ISO/IEC 14443 B functionality
The PN512 reader IC fully supports international standard ISO 14443 which includes
communication schemes ISO 14443 A and ISO 14443 B.
Refer to the ISO 14443 reference documents Identification cards - Contactless integrated
circuit cards - Proximity cards (parts 1 to 4).
Card to reader
(PN512 receives data
from a card)
card side
modulation
subcarrier load
modulation
subcarrier load
modulation
subcarrier load
modulation
subcarrier
frequency
13.56 MHz/16 13.56 MHz/16 13.56 MHz/16
bit encoding Manchester
encoding
BPSK BPSK
Table 6. Communication overview for ISO/IEC 14443 A/MIFARE reader/writer
…continued
Communication
direction
Signal type Transfer speed
106 kBd 212 kBd 424 kBd
Fig 8. Data coding and framing according to ISO/IEC 14443 A
001aak585
ISO/IEC 14443 A framing at 106 kBd
8-bit data 8-bit data 8-bit data
odd
parity
odd
parity
start
odd
parity
start bit is 1
ISO/IEC 14443 A framing at 212 kBd, 424 kBd and 848 kBd
8-bit data 8-bit data 8-bit data
odd
parity
odd
parity
start
even
parity
start bit is 0
burst of 32
subcarrier clocks
even parity at the
end of the frame