Designed for secure ID and banking applications, the MR31ZD40 is a serial access microcontroller that incorporates the most recent generation of ARM® processors for embedded secure systems. Its SecurCore® SC000™ 32-bit RISC core is built on the Cortex®-M0 core with additional security features to help to protect against advanced forms of attacks.
Cadenced at 28 MHz, the SecurCore® SC000™ core brings great performance and excellent code density thanks to the ARM® Thumb®-2 instruction set.
MR31Z devices implement MIFARE® DESFire® EV1 or MIFARE Plus® (including MIFARE® Classic) technology. MIFARE, MIFARE Plus, MIFARE DESFire and MIFARE Classic are registered trademarks of NXP B.V. and are used under license.
An RF interface including an RF universal asynchronous receiver (RFUART) enables contactless communication up to 848 Kbps compatible with the ISO/IEC 14443 Type A and Type B standards.
Very High Bit Rates (VHBR, Tx = 6.8 Mbps and Rx = 1.7 Mbps) are possible in Type B frames.
A Simultaneous mode where contactless communication can be enabled while the device is in Contact mode is also available.
The MR31ZD40 also offers a serial communication interface fully compatible with the ISO/IEC 7816-3 standard (T=0, T=1).
Two 16-bit general-purpose timers are available; one is configurable as a watchdog.
The MR31ZD40 features hardware accelerators for advanced cryptographic functions. The AES accelerator provides a high-performance implementation of AES-128, AES-192, AES-256 algorithms. The 3-key Triple DES accelerator (EDES+) peripheral enables Cipher Block Chaining (CBC) mode, fast DES and triple DES computation based on three key registers and one data register, while the NESCRYPT crypto-processor efficiently supports the public key algorithm with native operations up to 4096 bits long.
The MR31Z family operates in the –25 to +85 °C temperature range, at 3 V and 5 V supply voltage ranges in Contact mode and complies with ISO/IEC 14443 specification limits. A comprehensive range of power-saving modes enables the design of efficient low-power and contactless applications.
ARM® SecurCore® SC000™ 32-bit RISC core
245 Kbytes of User ROM
8 Kbytes of User RAM
40 Kbytes of User EEPROM
CPU clock frequency up to 28 MHz
Power-saving Standby state
Contact assignment compatible with ISO/IEC 7816-3 standards
Asynchronous receiver transmitter (IART) for high speed serial data support (ISO/IEC 7816-3 T=0/T=1 and EMV compliant)
ESD protection greater than 5 kV (HBM)
Complies with ISO/IEC 14443 Type A, B and B’, and PayPass® standards
13.56 MHz carrier frequency
RFUART (RF universal asynchronous receiver transmitter) up to 848 Kbps
Very High Bit Rate (VHBR): Tx = 6.8 Mbps and Rx = 1.7 Mbps
Simultaneous mode (Contact and Contactless)
4-Kbyte RF frame buffer in dedicated RFUART RAM
MIFARE Plus® and MIFARE® DESFire® EV1 HW and SW implementation
MIFARE® Classic available as part of MIFARE Plus®
Three-key Triple DES accelerator
NESCRYPT coprocessor for public key cryptography algorithm