Redpine Signals isn’t a newcomer to the secure IoT market, but its RS12000 SmartMCU series brings a new level of security to a range of IoT applications. The low-end RS12100, which sports a 250-MHz Cortex-M4F plus a 125-MHz DSP coprocessor to act as a sensor hub, can operate independently of the application processor for very-low-power, “always-on” operation.
The DSP has access to hardware accelerators for voice-activity detection (VAD), capacitive touch, and sensor data collection. The DSP, which can also be used to accelerate neural-network applications that are compatible with CMSIS-NN, is available with up to 400 kB of SRAM and 4 MB of flash storage.
Redpine Signals’ RS12300 SmartMCU, can implement two Cortex-M4 cores. It includes a DSP and security network processor.
The RS12200, which targets higher-performance solutions and includes a dual-core, Cortex-M4F version along with the DSP coprocessor, can also have twice the amount of SRAM and flash as its smaller sibling.
But, the RS12300 is where all components come into play for very secure systems. It adds the 160-MHz ThreadArch network security processor built around a trusted execution environment (TEE) architecture. The system incorporates a true random-number generator; an SRAM Physically Unclonable Function (PUF) based root of trust; high-performance Suite-B Accelerators for AES, SHA, ECC, and RSA; plus support for eXecute-in-Place (XIP) from flash with inline AES support. There are over 30 security features including secure real-time-clock (RTC) support and physical tamper pins, along with a pair of dc-dc regulators integrated on-chip.
The ThreadArch, which runs an integrated security stack from its 1-MB ROM, includes a full-featured TCP/IP stack, providing secure boot support for the entire SoC.
The chip family is designed to work with Redpine’s RS9116 wireless connectivity solutions. The RS9116 provides dual-mode Bluetooth 5, Wi-Fi, and 802.15.4 connectivity.
The RS12000 series comes with a variety of peripheral interfaces such as GPIO, timers, and serial interfaces. They can also support VAD, CAN, eMMC/SD Card, 10/100 Ethernet, 20-channel 12-bit ADCs, op-amps, DACs, and USB HS-OTG with PHY. The chips are available in BGA, QFN, and WLCSP packages.