The SSE-100 delivers a reference pre-integrated, validated, hardware and software subsystem that can be extended to provide an IoT endpoint system.
Figure 1.1 shows an IoT system consisting of several endpoints and a shared control node.
Figure 1.2 shows a block diagram of the hardware and software in an endpoint solution.
A complete endpoint system typically contains the following components:
- Compute subsystem
The SSE-100 consists of the Cortex-M3 processor and associated bus, debug, eFlash cache, eFlash controller, SRAM controller, and interface logic supplied by ARM.
- Reference system memory and peripherals
Additional memory, control, and peripheral components beyond the minimum SSE-100 components.
Licensees of the SSE-100 are provided with an example integration layer which includes implementations of eFlash and SRAM. The example integration layer provides a starting point for customizing an SoC.
- Communication interface
The endpoint will have some way of communicating with other nodes or masters in the system. This could be WiFi, Bluetooth, or a wired connection.
The ARM® Cordio® BT4 radio IP is available as an option for the SSE-100. The example integration layer expansion ports are however technology independent and other radio devices could be used instead of the Cordio radio IP. Radio-specific interfaces such as clock, reset, and power control must be implemented at the SoC level.
- Sensor or control component
To be useful as an endpoint, the reference design is typically extended by adding sensors or control logic such as, for example, temperature input or motor speed control output.
- Software development environment
ARM provides a complete software development environment which includes the ARM® mbed™ operating system, ARM or GCC compilers and debuggers, and firmware.
Any custom peripherals typically require corresponding third-party firmware that can be integrated into the software stack.