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OM25180FDKM Datasheet(PDF) 10 Page - NXP Semiconductors

Part # OM25180FDKM
Description  High-performance multi-protocol full NFC Forum-compliant frontend
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

OM25180FDKM Datasheet(HTML) 10 Page - NXP Semiconductors

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PN5180
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. 3.0 — 7 October 2016
240930
10 of 149
NXP Semiconductors
PN5180
High-performance multi-protocol full NFC Forum-compliant frontend
11. Functional description
11.1 Introduction
The PN5180 is a High-Power NFC frontend. It implements the RF functionality like an
antenna driving and receiver circuitry and all the low-level functionality to realize an NFC
Forum-compliant reader. The PN5180 connects to a host microcontroller with a SPI
interface for configuration, NFC data exchange and high-level NFC protocol
implementation.
The PN5180 allows different supply voltages for NFC drivers, internal supply and host
interface providing a maximum of flexibility.
The chip supply voltage and the NFC driver voltage can be chosen independently from
each other.
The PN5180 uses an external 27.12 MHz crystal as clock source for generating the RF
field and its internal digital logic. In addition, an internal PLL allows using an accurate
external clock source of either 8, 12, 16, 24 MHz. This saves the 27.12 MHz crystal in
systems which implement one of the mentioned clock frequencies (e.g. for USB or system
clock).
Two types of memory are implemented in the PN5180: RAM and EEPROM.
Internal registers of the PN5180 state machine store configuration data. The internal
registers are reset to initial values in case of PowerON, and Hardware-reset and standby.
The RF configuration for dedicated RF protocols is defined by EEPROM data which is
copied by a command issued from the host microcontroller - LOAD_RF_CONFIG- into the
registers of the PN5180. The PN5180 is initialized with EEPROM data for the
LOAD_RF_CONFIG command which has been tested to work well for one typical
antenna. For customer-specific antenna sizes and dedicated antenna environment
conditions like metal or ferrite, the pre-defined EEPROM settings can be modified by the
user. This allows users to achieve the maximum RF performance from a given antenna
design. It is mandatory to use the command LOAD_RF_CONFIG for the selection of a
specific RF protocol.
The command LOAD_RF_CONFIG initializes the registers faster compared to individual
register writes.
11.2 Power-up and Clock
11.2.1 Power Management Unit
11.2.1.1
Supply Connections and Power-up
The Power Management Unit of the PN5180 generates internal supplies required for
operation.
The following pins are used to supply the IC:
PVDD - supply voltage for the SPI interface and control connections
VBAT - Supply Voltage input


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