mfrc522芯片资料资源-CSDN文库

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### MFRC522芯片详解：非接触式智能卡读写技术的核心 #### 一、引言在当今数字化时代，非接触式智能卡技术在众多领域如支付、门禁控制、公共交通等得到了广泛应用，而这一切的背后，离不开关键组件——读写芯片的支持。MFRC522作为一款高性能的非接触式读写芯片，其功能与电气规格在智能卡读写领域扮演着至关重要的角色。本文将深入探讨MFRC522芯片的功能、特点及其在支持各种MIFARE协议中的应用。 #### 二、MFRC522芯片概述 ##### 功能与集成度 MFRC522是一款高度集成的读写集成电路，专门用于13.56MHz的非接触通信。它不仅支持ISO/IEC14443A标准下的MIFARE模式，还兼容多种MIFARE产品和协议，包括MIFARE Mini、MIFARE 1K、MIFARE 4K、MIFARE Ultralight、MIFARE DESFire EV1以及MIFARE Plus等。这种广泛的兼容性确保了MFRC522能够在不同场景下灵活应用。 ##### 内部结构与性能该芯片内部集成了强大的发射器，能够驱动设计用于与ISO/IEC14443A/MIFARE卡片和转接器进行通信的天线，无需额外的有源电路。接收模块则提供了一种稳健且高效的解调和解码方案，适用于来自ISO/IEC14443A/MIFARE兼容卡片和转接器的信号。数字模块负责管理完整的ISO/IEC14443A帧处理和错误检测（包括奇偶校验和CRC），从而确保数据传输的准确性和完整性。 ##### 版本差异 MFRC522有版本1.0（MFRC52201HN1）和版本2.0（MFRC52202HN1）之分，其中版本2.0在保持与版本1.0完全兼容的基础上，提供了更高的稳定性，尤其是在恶劣环境下的表现更加出色。此外，版本2.0还引入了一个额外的定时器预分频器，这为用户提供了更精细的时间控制能力，从而提升了整体的性能和可靠性。 #### 三、通信速度与接口 MFRC522支持MIF1xxS20、MIF1xxS70和MIF1xxS50产品，能够在非接触通信中实现高达848kb/s的数据传输速率，双向通讯能力使得数据交换更为高效。同时，MFRC522提供了多种主机接口选择： - **串行外设接口（SPI）**：这是一种高速同步串行数据传输接口，适合于与微控制器或其它主设备之间的数据交换。 - **串行UART接口**：类似于RS232接口，但电压电平依赖于引脚电源供应，适用于长距离通信场景。 - **I2C总线接口**：一种两线式串行总线标准，主要用于短距离低速数据通信，适用于小型系统或嵌入式设备。 #### 四、总结 MFRC522芯片以其高度集成的设计、广泛的协议兼容性、出色的通信速度以及多样的主机接口，成为非接触式智能卡读写领域的佼佼者。无论是对于专业开发人员还是终端用户，了解并掌握MFRC522的工作原理及特性，都将对提升智能卡系统的性能和用户体验起到关键作用。随着非接触技术的不断发展，MFRC522及其后续版本将持续在推动科技进步中扮演重要角色。

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1. Introduction

This document describes the functionality and electrical specifications of the contactless

reader/writer MFRC522.

Remark: The MFRC522 supports all variants of the MIFARE Mini, MIFARE 1K,

MIFARE 4K, MIFARE Ultralight, MIFARE DESFire EV1 and MIFARE Plus RF

identification protocols. To aid readability throughout this data sheet, the MIFARE Mini,

MIFARE 1K, MIFARE 4K, MIFARE Ultralight, MIFARE DESFire EV1 and MIFARE Plus

products and protocols have the generic name MIFARE.

2. General description

The MFRC522 is a highly integrated reader/writer IC for contactless communication

at 13.56 MHz. The MFRC522 reader supports ISO/IEC 14443 A/MIFARE mode.

The MFRC522’s internal transmitter is able to drive a reader/writer antenna designed to

communicate with ISO/IEC 14443 A/MIFARE cards and transponders without additional

active circuitry. The receiver module provides a robust and efficient implementation for

demodulating and decoding signals from ISO/IEC 14443 A/MIFARE compatible cards and

transponders. The digital module manages the complete ISO/IEC 14443 A framing and

error detection (parity and CRC) functionality.

The MFRC522 supports MF1xxS20, MF1xxS70 and MF1xxS50 products. The MFRC522

supports contactless communication and uses MIFARE higher transfer speeds up to

848 kBd in both directions.

The following host interfaces are provided:

• Serial Peripheral Interface (SPI)

• Serial UART (similar to RS232 with voltage levels dependant on pin voltage supply)

• I

C-bus interface

2.1 Differences between version 1.0 and 2.0

The MFRC522 is available in two versions:

• MFRC52201HN1, hereafter referred to version 1.0 and

• MFRC52202HN1, hereafter referred to version 2.0.

The MFRC522 version 2.0 is fully compatible to version 1.0 and offers in addition the

following features and improvements:

MFRC522

Contactless reader IC

Rev. 3.6 — 14 December 2011

112136

Product data sheet

COMPANY PUBLIC

Product data sheet

COMPANY PUBLIC

Rev. 3.6 — 14 December 2011

112136 2 of 94

NXP Semiconductors

MFRC522

Contactless reader IC

• Increased stability of the reader IC in rough conditions

• An additional timer prescaler, see Section 8.5.

• A corrected CRC handling when RX Multiple is set to 1

This data sheet version covers both versions of the MFRC522 and describes the

differences between the versions if applicable.

3. Features and benefits

 Highly integrated analog circuitry to demodulate and decode responses

 Buffered output drivers for connecting an antenna with the minimum number of

external components

 Supports ISO/IEC 14443 A/MIFARE

 Typical operating distance in Read/Write mode up to 50 mm depending on the

antenna size and tuning

 Supports MF1xxS20, MF1xxS70 and MF1xxS50 encryption in Read/Write mode

 Supports ISO/IEC 14443 A higher transfer speed communication up to 848 kBd

 Supports MFIN/MFOUT

 Additional internal power supply to the smart card IC connected via MFIN/MFOUT

 Supported host interfaces

 SPI up to 10 Mbit/s

 I

C-bus interface up to 400 kBd in Fast mode, up to 3400 kBd in High-speed mode

 RS232 Serial UART up to 1228.8 kBd, with voltage levels dependant on pin

voltage supply

 FIFO buffer handles 64 byte send and receive

 Flexible interrupt modes

 Hard reset with low power function

 Power-down by software mode

 Programmable timer

 Internal oscillator for connection to 27.12 MHz quartz crystal

 2.5 V to 3.3 V power supply

 CRC coprocessor

 Programmable I/O pins

 Internal self-test

4. Quick reference data

Table 1. Quick reference data

Symbol Parameter Conditions Min Typ Max Unit

DDA

analog supply voltage V

DD(PVDD)

 V

DDA

= V

DDD

= V

DD(TVDD)

;

SSA

SSD

SS(PVSS)

SS(TVSS)

=0V

[1][2]

2.5 3.3 3.6 V

DDD

digital supply voltage 2.5 3.3 3.6 V

DD(TVDD)

TVDD supply voltage 2.5 3.3 3.6 V

DD(PVDD)

PVDD supply voltage

[3]

1.6 1.8 3.6 V

DD(SVDD)

SVDD supply voltage V

SSA

SSD

SS(PVSS)

SS(TVSS)

= 0 V 1.6 - 3.6 V

Product data sheet

COMPANY PUBLIC

Rev. 3.6 — 14 December 2011

112136 3 of 94

NXP Semiconductors

MFRC522

Contactless reader IC

[1] Supply voltages below 3 V reduce the performance in, for example, the achievable operating distance.

[2] V

DDA

, V

DDD

and V

DD(TVDD)

must always be the same voltage.

[3] V

DD(PVDD)

must always be the same or lower voltage than V

DDD

[4] I

is the total current for all supplies.

[5] I

DD(PVDD)

depends on the overall load at the digital pins.

[6] I

DD(TVDD)

depends on V

DD(TVDD)

and the external circuit connected to pins TX1 and TX2.

[7] During typical circuit operation, the overall current is below 100 mA.

[8] Typical value using a complementary driver configuration and an antenna matched to 40  between pins TX1 and TX2 at 13.56 MHz.

5. Ordering information

[1] Delivered in one tray.

[2] Delivered in five trays.

power-down current V

DDA

DDD

= V

DD(TVDD)

DD(PVDD)

=3V

hard power-down; pin NRSTPD set LOW

[4]

--5A

soft power-down; RF level detector on

[4]

--10A

DDD

digital supply current pin DVDD; V

DDD

=3V - 6.5 9 mA

DDA

analog supply current pin AVDD; V

DDA

= 3 V, CommandReg register’s

RcvOff bit = 0

-710mA

pin AVDD; receiver switched off; V

DDA

=3V,

CommandReg register’s RcvOff bit = 1

-35mA

DD(PVDD)

PVDD supply current pin PVDD

[5]

--40mA

DD(TVDD)

TVDD supply current pin TVDD; continuous wave

[6][7][8]

-60100mA

amb

ambient temperature HVQFN32 25 - +85 C

Table 1. Quick reference data

…continued

Symbol Parameter Conditions Min Typ Max Unit

Table 2. Ordering information

Type number Package

Name Description Version

MFRC52201HN1/TRAYB

[1]

HVQFN32 plastic thermal enhanced very thin quad flat package; no leads;

32 terminal; body 5  5  0.85 mm

SOT617-1

MFRC52201HN1/TRAYBM

[2]

HVQFN32 plastic thermal enhanced very thin quad flat package; no leads;

32 terminal; body 5  5  0.85 mm

SOT617-1

MFRC52202HN1/TRAYB

[1]

HVQFN32 plastic thermal enhanced very thin quad flat package; no leads;

32 terminal; body 5  5  0.85 mm

SOT617-1

MFRC52202HN1/TRAYBM

[2]

HVQFN32 plastic thermal enhanced very thin quad flat package; no leads;

32 terminal; body 5  5  0.85 mm

SOT617-1

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