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 89 of 137
NXP Semiconductors
PN512
Full NFC Forum-compliant frontend
Configured in the Secure Access Mode the host controller can directly communicate to
the Secure IC via SIGIN/SIGOUT. In this mode the PN512 generates the RF clock and
performs the communication on the SIGOUT line. To enable the Secure Access module
mode the clock has to be derived by the internal oscillator of the PN512, see bits
SAMClockSel in register TestSel1Reg.
Configured in Contactless Card mode the secure IC can act as contactless smart card IC
via the PN512. In this mode the signal on the SIGOUT line is provided by the external RF
field of the external reader/writer. To enable the Contactless Card mode the clock derived
by the external RF field has to be used.
The configuration of the S
2
C interface differs for the FeliCa and MIFARE scheme as
outlined in the following chapters.
Fig 30. Communication flows using the S
2
C interface
001aan226
CONTACTLESS UART
SERIAL SIGNAL SWITCH
FIFO AND STATE MACHINE
SPI, I
2
C, SERIAL UART
HOST CONTROLLER
PN512
SECURE CORE IC
SIGOUT
SIGIN
2. contactless
card mode
1. secure access
module (SAM) mode