Embedded - Microcontrollers

Main Classification

Classified by use: Universal type: Provide all the resources (ROM, RAM, I / O, EPROM) that can be developed to the user.Special type: Its hardware and instructions are designed according to a specific purpose, such as the recorder movement controller, printer controller, motor controller, etc.
Classified by the number of data bits processed by its basic operation:
According to the width of the bus or data register, the microcontroller is divided into 1-bit, 4-bit, 8-bit, 16-bit, 32-bit, and even 64-bit microcontrollers. Most 4-digit MCUs are used in calculators, car meters, car anti-theft devices, pagers, wireless phones, CD players, LCD drive controllers, LCD game consoles, children's toys, scales, chargers, tire pressure meters , Temperature and humidity meter, remote control and point-and-shoot camera; most of the 8-bit MCUs are used in electricity meters, motor controllers, electric toy machines, inverter air conditioners, pagers, fax machines, caller ID, call recorders , CRT monitor, keyboard and USB; 8-bit and 16-bit microcontrollers are mainly used in general control fields, generally do not use operating systems, most of 16-bit MCUs are used in mobile phones, digital cameras and camcorders; Most 32-bit MCUs are used in Modem, GPS, PDA, HPC, STB, Hub, Bridge, Router, Workstation, ISDN phone, laser printer and color fax machine; 32-bit is used for network processing, multimedia processing and other complex processing , Generally use an embedded operating system. Most of the 64-bit MCUs are used in high-end workstations, multimedia interactive systems, advanced TV game instruments (such as SEGA's Dreamcast and Nintendo's GameBoy) and advanced terminals.