MFRC523 查看數據表（PDF） - NXP Semiconductors.

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MFRC523

Contactless Reader IC

NXP Semiconductors. 

NXP Semiconductors

MFRC523

Contactless reader IC

8. Functional description

The MFRC523 transmission module supports the Read/Write mode for

ISO/IEC 14443 A/MIFARE and ISO/IEC 14443 B using various transfer speeds and

modulation protocols.

BATTERY

MICROCONTROLLER

MFRC523

reader/writer

Fig 4. MFRC523 Read/Write mode

ISO/IEC 14443 A CARD

contactless card

001aal156

8.1 ISO/IEC 14443 A/MIFARE functionality

The physical level communication is shown in Figure 5.

ISO/IEC 14443 A

READER

MFRC523

(1)

ISO/IEC 14443 A CARD

(2)

001aal157

Fig 5. ISO/IEC 14443 A/MIFARE Read/Write mode communication diagram

The physical parameters are described in Table 4.

Table 4. Communication overview for ISO/IEC 14443 A/MIFARE reader/writer

Communication

direction

Signal type

Transfer speed

106 kBd

212 kBd

424 kBd

Reader to card (send

data from the

MFRC523 to a card)

reader side

modulation

bit encoding

100 % ASK

modified Miller

encoding

100 % ASK

modified Miller

encoding

100 % ASK

modified Miller

encoding

bit length

128 (13.56 μs) 64 (13.56 μs)

32 (13.56 μs)

Card to reader

(MFRC523 receives

data from a card)

card side

modulation

subcarrier

frequency

subcarrier load

modulation

13.56 MHz / 16

subcarrier load

modulation

13.56 MHz / 16

subcarrier load

modulation

13.56 MHz / 16

bit encoding

Manchester

encoding

BPSK

BPSK

848 kBd

100 % ASK

modified Miller

encoding

16 (13.56 μs)

subcarrier load

modulation

13.56 MHz / 16

BPSK

The MFRC523’s contactless UART and dedicated external host must manage the

complete ISO/IEC 14443 A/MIFARE protocol. Figure 6 shows the data coding and

framing according to ISO/IEC 14443 A/MIFARE.

MFRC523_33

Product data sheet

PUBLIC

All information provided in this document is subject to legal disclaimers.

Rev. 3.3 — 5 March 2010

115233

© NXP B.V. 2010. All rights reserved.

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