Nuvoton M2351 is a secure microcontroller platform powered by ARM Cortex-M23 core with ARMv8-M architecture, TrustZone technology, security technologies, peripherals and tools. The ultra-low-power 32-bit microcontroller works in low voltage range from 1.62V to 3.6V and can operate at up to 48 MHz frequency, with up to 512 Kbytes embedded Flash memory in dual bank mode supporting OTA firmware update and up to 96 Kbytes embedded SRAM. It is suitable for applications such as IoT secure connections, fingerprint authentication, EMV card reader, security alarm system, smart home appliance, wireless sensor node device (WSND), auto meter reading (AMR) and portable wireless data collector.
The M2351 series is equipped with 32 Kbytes Secure Boot ROM as root of trust, multiple firmware programming tools by In-System Programming (ISP), In-Circuit Programming (ICP) and In-Application Programming (IAP). In addition to TrustZone software protection mechanism, it also supports eXecution Only Memory (XOM), LDROM (user program loader) and multiple cryptographic hardware accelerators which are used to protect the core software and data assets on a microcontroller system. The M2351 series also integrates a 8 COM x 40 SEG controller with internal charge pump for segment LCD panel and provides high performance connectivity peripheral interfaces such as UART, SPI, I²C, GPIOs, USB and ISO 7816-3 for smart card reader.
As to Power efficiency, the M2351 series supports Brown-out detector, Power-down mode with RTC turn on, RAM retention less than 2.0 uA, deep power-down mode with RAM retention less than 1 uA and fast wake-up via multiple peripheral interfaces.
ARM Cortex-M23 TrustZone Technology
8 Memory Protection Units (MPU)
8 Security Attribution Units (SAU)
Implementation Defined Attribution Unit (IDAU)
2 KB OTP ROM with additional 1KB lock bits
Hardware Crypto Accelerators
CRC calculation unit
Up to 6 tamper detection pins
96-bit Unique ID (UID), 128-bit Unique Customer ID (UCID)