Microcontroller Unit (Microcontroller Unit; MCU), also known as the Single Chip Microcomputer (Single Chip Microcomputer) or single chip computer. Speech chip definition: the speech signal is converted into a number by sampling, stored in the ROM of the IC, and then through the circuit to restore the numbers in the ROM into a speech signal. Touch MCU is based on the main control MCU integrated touch function. Pressure sense is actually a kind of touch MCU.