參數(shù)資料
型號: PN531
廠商: NXP Semiconductors N.V.
英文描述: Zener Diode; Application: General; Pd (mW): 400; Vz (V): 7.5 to 7.9; Condition Iz at Vz (mA): 5; C (pF) max: -; Condition VR at C (V):   ESD (kV) min: -; Package: MHD
中文描述: レ基于C傳輸模塊
文件頁數(shù): 6/19頁
文件大小: 246K
代理商: PN531
Philips Semiconductors Objective Short Form Specification Rev. 2.0 February 2004
PN531
μC based Transmission module
2 BLOCK DIAGRAM
2.1 Simplified PN531 Block Diagram
Analog
Circuitry
Output driver
Integrated
Demodulator
Bit Decoder
Mode-
Detector
RF-Level-
Detector
Contactless
UART
incl.
Data processing
CRC/Parity
generation &
Check
Framing
Generation &
Check
Bit Coding &
Decoding
Host
Interfaces
I2C
serial UART
SPI
USB
80C51 Core,
ROM,
RAM
Host
Interface
PN531
Figure 1: PN531 Block Diagram
The Analog circuitry handles the modulation and demodulation of the analog signals according to the card
mode, reader /writer mode and NFC mode communication scheme.
The RF level detector detects the presence of an external RF field at 13.56 MHz.
The mode detector detects a MIFARE, FeliCa
TM
or NFC coding of an incoming signal in order to prepare
the internal receiver to demodulate signals that are sent to the PN531.
The integrated contactless UART and the firmware handle the protocol requirements for the communication
schemes including the RF based protocols as well as the protocols for host communication.
The microcontroller with its embedded firmware allows autonomous management of communication both on
the RF interface and with the host.
Various host interfaces are implemented to fulfil different customer requirements.
6
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