Google, of course, is very big, angry and bad, but there is no need to search for what is on the manufacturer’s website:
> it breaks with the widespread concept of having one application microprocessor talking over serial line using AT commands with a separate cellular modem. Beside this it uses the latest ARM Cortex-M33 CPU core with new security features targeting especially secure IoT applications. The LTE modem is directly integrated into the SiP and communicating with the application processor using interprocessor communication based on shared memory.