Lead: MCU is really difficult for beginners to understand, many students who have studied SCM or electronic enthusiasts, even when they graduated, they still have nothing. Based on this, the electronic enthusiast network will integrate the "single-chip knowledge of the key points of the single-chip", divided into four series, to readers, so stay tuned! This series also has collection and reference value for electronic engineers in the industry. A list of key knowledge points of the microcontroller: Series one Series two Series three Series four 1: Microcontroller brief What is a single-chip computer? A computer that can work has several parts: CPU (for operation, control), RAM (data storage), ROM (program storage), input/output devices (for example: serial port, parallel Output port, etc.). These parts are divided into a number of chips on a personal computer and a printed circuit board called a motherboard is mounted. In the MCU, these parts are all implemented in an integrated circuit chip, so it is called a single-chip (single-chip) machine, and some MCUs integrate other parts like the above. A/D, D/A, etc. The MCU is a control chip, a tiny computer, plus crystal oscillator, memory, address latch, logic gate, seven-segment decoder (display), buttons (similar to the keyboard), expansion chip, interface, etc. system. 2: Microcontroller pin introduction The 40 pins of a microcontroller can be roughly divided into four categories: power, clock, control, and I/O pins. 1. Power supply: (1) VCC - chip power supply, connected to +5V; (2) VSS - ground terminal; 2. Clock: XTAL1, XTAL2 - Inverting input and output of crystal oscillator circuit. 3. Control line: There are 4 control lines. (1) ALE/PROG: Address Latch Enable / On-chip EPROM Programming Pulse 1 ALE function: used to latch the low 8-bit address sent by P0 port 2 PROG function: Chip with EPROM on chip. During EPROM programming, this pin inputs programming pulse. (2) PSEN: External ROM read strobe signal. (3) RST/VPD: Reset/standby power. 1 RST (Reset) function: reset signal input. 2 VPD function: Connect the backup power supply when Vcc is powered off. (4) EA/Vpp: internal and external ROM selection / on-chip EPROM programming power supply. 1 EA function: internal and external ROM selection. 2 Vpp function: Chip with EPROM on chip, during programming of EPROM, apply programming power supply Vpp. Portable Dry Herb Vaporizers,Handheld Liquid Vaporiser,Gold Evaporator With Titanium Enclosure,Portable Dry Herb Vaporizer END GAME LABS , https://www.eglvape.com
1: Microcontroller brief 2: Microcontroller pin introduction 3: MCU memory structure 4: The first microcontroller small program 5: Analysis of single-chip delay program 6: Single-chip parallel port structure 7: Special function register of the microcontroller 8: Single-chip addressing mode and command system 9: MCU data transfer instructions 10: MCU data transfer instructions 11: MCU arithmetic operation instruction 12: Single-chip logic operation instruction 13: Single-chip logic and or XOR instruction 14: MCU conditional transfer instruction 15: MCU bit operation instruction 16: MCU timer and counter 17: The way of the microcontroller timer / counter 18: Interrupt system of single chip microcomputer 19: MCU timer, interrupt test 20: Microcontroller timer/counter experiment 21: Introduction to the serial port of the MCU 22: Design of serial port communication program of single chip microcomputer 23: LED digital tube static display interface and editing 24: Dynamic scan display interface circuit and program 25: Microcontroller keyboard interface programming 26: Single-chip matrix keyboard interface technology and 27: Some basic concepts about microcontroller 28: Actual case practice - MCU music program design 