Product data

MFRC631 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.3 — 4 February 2014
227433 11 of 120
NXP Semiconductors
MFRC631
High performance ISO/IEC 14443 A/B reader solution
8.3 Contactless interface unit
The contactless interface unit of the MFRC631 supports the following read/write operating
modes:
• ISO/IEC14443A/MIFARE
• ISO/IEC14443B
A typical system using the MFRC631 is using a microcontroller to implement the higher
levels of the contactless communication protocol and a power supply (battery or external
supply).
8.3.1 ISO/IEC14443A/MIFARE functionality
The physical level of the communication is shown in Figure 5.
The physical parameters are described in Table 5.
Fig 4. Read/write mode
001aal996
BATTERY/POWER SUPPLY
reader/writer
MICROCONTROLLER
READER IC ISO/IEC 14443 A CARD
(1) Reader to Card 100 % ASK, Miller Coded, Transfer speed 106 kbit/s to 848 kbit/s
(2) Card to Reader, Subcarrier Load Modulation Manchester Coded or BPSK, transfer speed
106 kbit/s to 848 kbit/s
Fig 5. ISO/IEC 14443 A/MIFARE read/write mode communication diagram
(1)
(2)
001aam268
ISO/IEC 14443 A CARD
ISO/IEC 14443 A
READER