51 MCU is a general term for all MCUs compatible with Intel 8031 ​​instruction system. The first ancestor of this series of MCUs is Intel's 8004 MCU. Later, with the development of Flash rom technology, the 8004 MCU has made great progress and become one of the most widely used 8-bit MCUs. Its representative model is ATMEL's AT89 series. Widely used in industrial measurement and control systems. Many companies have launched 51 series compatible models, which will occupy a large number of markets for a long time to come. 51 single-chip microcomputer is a single-chip computer that is the basic introduction, or the most widely used one. It should be noted that the 51 series of single-chip microcomputers generally do not have self-programming capabilities. The main chip products introduced by 51 MCU *Intel (Intel): 80C31, 80C51, 87C51, 80C32, 80C52, 87C52, etc.; *ATMEL (Ademel): 89C51, 89C52, 89C2051, 89S51 (RC), 89S52 (RC), etc.; *Many products from companies such as Philips, Winbond, Dallas, and Siemens; *STC (domestic macro crystal) single-chip: 89c51, 89c52, 89c516, 90c516 and many other brands. The 51 single-chip integrated board adopts AT89S51 chip as the main control chip, and supports LCD1602 liquid crystal display, DS1302 real-time clock control, I2C analog communication based on AT24C02 and keyboard control circuit. At the same time, the circuit uses the commonly used ADC8302 chip as a digital-to-analog conversion circuit. External DS18B20 temperature sensor, HS0038 infrared receiving probe and USB interface. Pcb diagram: The entire circuit design layout is neat and can be directly developed for proofing. 51 single chip integrated development board circuit schematic screenshot:
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What is 51 single-chip microcomputer, 51 single-chip integrated development board circuit (schematic diagram + PCB)
What is a 51 MCU?