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 6 of 137
NXP Semiconductors
PN512
Full NFC Forum-compliant frontend
5. Block diagram
The analog interface handles the modulation and demodulation of the analog signals
according to the Card Receiving mode, Reader/Writer mode and NFCIP-1 mode
communication scheme.
The RF level detector detects the presence of an external RF-field delivered by the
antenna to the RX pin.
The Data mode detector detects a MIFARE, FeliCa or NFCIP-1 mode in order to prepare
the internal receiver to demodulate signals, which are sent to the PN512.
The communication (S
2
C) interface provides digital signals to support communication for
transfer speeds above 424 kbit/s and digital signals to communicate to a secure IC.
The contactless UART manages the protocol requirements for the communication
protocols in cooperation with the host. The FIFO buffer ensures fast and convenient data
transfer to and from the host and the contactless UART and vice versa.
Various host interfaces are implemented to meet different customer requirements.
Fig 1. Simplified block diagram of the PN512
001aaj627
HOST
ANTENNA
FIFO
BUFFER
ANALOG
INTERFACE
CONTACTLESS
UART
SERIAL UART
SPI
I
2
C-BUS
REGISTER BANK