(1) Embedded Micro Processor Unit (EMPU) EMPU generally refers to a CPU in a general-purpose computer.It is basically the same as a standard microprocessor, but it has been enhanced in terms of operating temperature, electromagnetic interference resistance, and reliability.It is generally based on a microprocessor core. The chip integrates ROM/EPROM, RAM, Flash, bus, bus logic, timer/counter, WatchDog, I/O, serial port, pulse width modulation output, A/.D, D / A and other necessary functional modules and peripherals.

4) Embedded System On Chip (ESOC) The highest form of embedded system implementation is a single chip system, while the core technology of SOC is an IP core (Intellec-tual Property Kernels) component.