Microsoft Azure Sphere Secure IoT Platform with vast I/O peripheral subsystem for diverse IoT applications

The MT3620 is a highly integrated, high performance IoT application platform with a security design focus necessary for modern, robust internet-connected devices. The platform targets any IoT application that requires a hardened security platform. These could be wide-ranging to include smart home, industrial or many more novel IoT applications thanks to MT3620’s vast I/O peripheral subsystem that allows device developers extensive freedom.

The MT3620 was designed in close cooperation with Microsoft for its Azure Sphere Secure IoT Platform.

High Performance AP and Real-time I/O Sub-Processors

MT3620 features an Arm Cortex-A7 application processor operates up to 500MHz and includes large L1$ and L2$ and integrated SRAM for highly efficient operation over a wider range of potential applications. Two general purpose Arm Cortex-M4F I/O subsystems support the requirements of the many on-chip peripherals including 5x UART/I2C/SPI, 2x I2S, 8x ADC, up to 12 PWM counters and up to 72x GPIO, allowing an extensively diverse potential number of applications. These two Cortex-M4F I/O subsystems are primarily intended to support real-time I/O processing but can also be used for general purpose computation and control. The Cortex-M4F cores may run any end-user-provided operating system or run a ‘bare metal app’ with no operating system.

Pluton Security System

Outside of these three end-user accessible cores, MT3620 contains an isolated security subsystem with its own Arm Cortex-M4F core that handles secure boot and secure system operation. In addition, a 1x1 dual-band 802.11a/b/g/n Wi-Fi radio subsystem is controlled by a dedicated Andes N9 32-bit RISC core. This subsystem contains radio, baseband and MAC that is designed to allow high throughput applications with great power efficiency.

Operation of the MT3620 security features and Wi-Fi networking are isolated from, and run independently of, end user applications. Only hardware features supported by the Azure Sphere Secure IoT Platform are available to MT3620 end-users. As such, security features and Wi-Fi are only accessible via defined APIs and are robust to programming errors in end-user applications regardless of whether these applications run on the Cortex-A7 or the user-accessible Cortex-M4F cores.

Microsoft provides a powerful development environment based on the gcc compiler which includes a Visual Studio extension, allowing this application to be developed in C. Please refer to documentation from Microsoft for information about which hardware features are available to end-user applications.

Microsoft Azure Sphere Secure IoT Platform

MT3620 leverages the Microsoft Azure Sphere Secure IoT Platform provide an unprecedented level of security to connected device manufacturers. For the lifetime of the device, the secure platform provides device authentication and attestation, supports remote over-the-air software updates to maintain security in the face of evolving attacks, and also automates error logging and reporting. Please refer to the overview document from Microsoft for more information.

Download Documents

MediaTek MT3620 Product Brief

Application Processor

AP Type:
ARM Cortex-A7
AP Core Quantity:
Single (1)
AP Frequency:


CPU Type:
ARM Cortex-M4 with FPU
CPU Cores:
Dual (2)

peripheral Interfaces



2.4GHz,  5GHz