1. General introduction;
A single-chip microcomputer is a large-scale integrated circuit chip. Nowadays, when introducing single-chip microcomputers, the MCS-51 single-chip microcomputer is generally used as the basis. When learning single-chip microcomputers, we learn from both hardware and software aspects. Hardware aspects: external pins, internal programming structure, memory structure, clock circuit, reset circuit and minimum system composition.
2. Pin introduction:
1. Main power pins (2): connected to power and ground
2. External crystal pins (2 pins);
3. Input and output pins (32)
P0——General purpose port; bidirectional channel; usually connected to a pull-up resistor externally P1——Quasi-bidirectional port, with internal pull-up resistor P2/3——Quasi-bidirectional port
4. Control pins (4): RST - reset signal input terminal ALE - address latch enable signal EA - on-chip program memory selection control terminal
3. MCU mind map
4. Introduction to the basics of MCU hardware
5. Summarize new experiences
The programmer does not need to understand the complex circuit structure, electrical connections or switching characteristics inside the microcontroller, but must master the programming structure of the microcontroller.
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Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
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