the development direction of chips is from CPU to SoC, and now there is no pure CPU, all SoC. The core that ARM sells is actually the CPU (of course, it also needs a bus), and the various peripherals are added by the semiconductor manufacturers themselves.
CPU https://plcmicro.com/sensors/
MPU https://plcmicro.com/sensors/
MCU https://plcmicro.com/sensors/
