Designed for secure ID and banking applications, the ST31P320 and ST31P450 devices are serial access microcontrollers that incorporate the most recent generation of Arm® processors for embedded secure systems. Their 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 55 MHz, the SC000™ core brings great performance and excellent code density thanks to the Thumb®-2 instruction set.
Certain devices implement the MIFARE Classic® , MIFARE® DESFire® EV2 or MIFARE Plus® technology.
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 standard.
The devices also offer a serial communication interface fully compatible with the ISO/IEC 7816-3 standard (T=0, T=1).
Three 16-bit general-purpose timers are available as well as a watchdog timer.
The devices feature hardware accelerators for advanced cryptographic functions. The AES accelerator provides a high-performance implementation of the AES-128, AES-192 and AES256 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 cryptoprocessor efficiently supports the public key algorithm with native operations up to 4096 bits long.
The devices operate in the –25 to +85 °C temperature range, in the 2.7 V and 5.5 V supply voltage ranges in Contact mode, and comply 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 cadenced at up to 55 MHz
10 Kbytes of User RAM
Up to 450 Kbytes of secure User high-density Flash memory including 512 bytes of User OTP area:
25-year data retention
500 000 Erase/Write cycle endurance
Page Erase time: 0.8 ms
Programming performance up to 2 µs/byte in chained mode
Flash Erase/Write protection programmable on 32-Kbyte sectors
Operating temperature: –25 °C to +85 °C
Three 16-bit timers with interrupt
2.7 V to 5.5 V supply voltages
External clock frequency up to 10 MHz
Power-saving Standby state
Contact assignment compatible with ISO/IEC 7816-3 standards
ESD protection (HBM): 6 kV HBM for ISO pads and 4 kV for AC0/AC1 contactless pads
Asynchronous receiver transmitter (IART) with RAM buffer for high speed serial data support (ISO/IEC 78163 T=0/T=1 and EMV compliant)
Complies with ISO/IEC 14443 Type A and EMVCo™
68 pF tuning capacitor
Automatic CPU frequency adaptation for optimum power consumption
13.56 MHz carrier frequency
RFUART (RF universal asynchronous receiver transmitter) up to 848 kbps
1-Kbyte RF frame buffer in dedicated RFUART RAM
MIFARE Classic®, MIFARE Plus® and MIFARE® DESFire® EV2 hardware and software implementation
Monitoring of environmental parameters
Three-key Triple DES accelerator
AIS-31 Class PTG.2 compliant true random number generator (TRNG)
NESCRYPT coprocessor for public key cryptography algorithm