Secure Cortex-M3 flash microcontroller with XiP QuadSPI interface
The microcontroller is intended to provide an interoperable, secure, and cost-effective solution to build new generations of trusted devices such as mobile chip and pin pads. The MCU is based on a Cortex-M3 processor with 1 MB of embedded flash, 384 kB of system RAM, and 8 kB of battery-backed AES self-encrypted NVSRAM. In addition to a high-performance QSPI interface for secure code execution (XiP: execture in place) and data storage, it includes most of the essential functions of mobile POS terminal including a cryptographic engine, a true random number generator, battery-backed RTC, environmental and tamper detection circuitry, a magnetic stripe reader, a smart card controller with embedded transceiver to directly support 1.8V, 3.3V, and 5V cards, and an integrated secure keypad controller. It also provides a seamless interface to monochrome graphic displays and includes an array of peripherals, SPIs, UARTs, DMA, ADC, and DAC, that add flexibility to control and differentiate the system design.
The feature list for the device includes;
108 MHz core operating frequency through PLL
1MB dual-bank flash memory with cache
384kB system SRAM
8KB AES self-encrypted NVSRAM
Security features facilitate system-level protection
Secure boot loader with public key authentication
AES, DES and SHA hardware accelerators
Modulo arithmetic hardware accelerator (MAA) supporting RSA, DSA, and ECDSA
8-line secure keypad controller
Hardware true random-number generator
Die shield with dynamic fault detection
6 external tamper sensors with independent random dynamic patterns
256-bit flip-flop-based battery-backup AES key storage
Temperature and voltage tamper monitor
Real-time clock
Integrated peripherals reduce external component count
Triple-track magnetic stripe head interface
Two ISO 7816 smart card UART with one that integrates a ISO7816 transceiver (1.8V, 3V, and 5V)
USB 2.0 device with internal transceiver and dedicated PLL
3 SPI ports, 2 UART ports, and 2 I²C controller
6 timers, 4 with PWM capability
Up to 64 general-purpose I/O pins
2-channel, 10-bit ADC and 1-channel, 8-bit DAC
Monochrome LCD controller
4-channel DMA controller
1 SPI execute in place (XiP) master
Power management optimizes battery life and reduces active power consumption
Single 3.3V supply operation*
Integrated battery-backup switch
Clock gating function,
Low-current battery-backup operation
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