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A microcontroller is a miniaturized processor, equivalent to a computer's CPU, capable of processing and controlling various electronic devices found in household appliances and electronics.

A co-packaged MCU (Microcontroller Unit) refers to a type of electronic component package where a microcontroller and other related components, such as power management and communication circuitry, are integrated and physically packaged together in a single module.

Once a new project of electronics and embedded system got kicked off, there inevitably comes the job to select a proper microcontroller chip. Here are a few of the foremost factors that need to put into consideration at the very beginning.

Microcontroller is essentially a chip, there are many types of packaging, For example, DIP(Dual In-line Package), SOP(Small out-of-line Package), PLCC(Plastic Leaded Chip Carrier plastic chip package with lead), QFP(Quad) Flat Package plastic square flat package), PGA(Pin Grid Array package Pin Grid Array package), BGA(Ball Grid Array Package), etc. The following is a brief introduction to common chip packaging forms.