Introduction of 80C51 single-chip microcomputer

80c51 MCU belongs to MCS-51 series MCU, developed by Intel Corporation, its structure is 8048 extension, improved 8048 disadvantage.

Instructions such as multiply (MUL), Divide (DIV), subtract (Subb), compare (CMP), 16-bit data pointers, Boolean algebra operations, and serial communication capabilities and 5 interrupt sources are added.

In a 40-pin, dual-in-line dip (Dual), it features 128Byte RAM units and 4K ROM.

The 80C51 has two 16-bit timing counters, two external interrupts, two timing count interrupts, and a serial interrupt with 4 8-bit parallel inputs.

80C51 internal clock circuit, but the need for quartz crystal and trimmer capacitor external, the system uses 12MHz crystal oscillator frequency.

As the 80C51 system can meet the requirements of data acquisition and time precision, and the production is rich in source and application is very mature, it is used as the core of control.

Learn the single-chip confidential knowledge of product manuals, register function;

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Reference Links:

51 Single Chip microcomputer register function list (most complete): https://wenku.baidu.com/view/6d26d27fdd88d0d232d46abc.html

Introduction of 80C51 single-chip microcomputer