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The circuit diagram of the independent button module of the development board is as follows: Purpose: To turn on/off the first LED by controlling the independent button K1 Port P3 is a bidirectio...[Details]
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On August 9, according to the first half performance report released by China Unicom, 3G business service revenue was 40.91 billion yuan, exceeding 2G business revenue for the first time, which show...[Details]
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As more and more mobile phones support Bluetooth function, Bluetooth headsets have become a must-have option for mobile phones. At the same time, with the launch of stereo Bluetooth headsets ...[Details]
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Samsung Electronics recently said that the home trend has led to strong demand for chips and displays, and its net profit in the fourth quarter of last year increased by 26.4% year-on-year, according...[Details]
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Recently, the Passenger Car Market Information Joint Branch of the China Automobile Dealers Association (hereinafter referred to as the Passenger Car Association) released a report showing that the...[Details]
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Good insulation performance is the guarantee for the normal operation of power equipment, and its quality will directly affect the operation of the power grid. By testing the insulation resistance of...[Details]
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Mobile phones have entered the era of full-screen phones for several years. Whether it is a lifting screen or a punch-hole screen, the current full-screen design has many drawbacks. The ideal...[Details]
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The US ban on ZTE has not only affected Qualcomm, but also hit Apple hard in recent days. In just three days, its market value evaporated by US$63.9 billion. iPhone Retail Stores First strike: Weak...[Details]
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During World War II, Hollywood actress Hedy Lamarr, who should have relied on her beauty to make a living, chose to rely on her strength to join hands with pianist George Antheil to study frequency h...[Details]
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This is the most accurate and easy-to-understand document describing the 24 series I2C read and write timing, especially the description of the master and slave device responses and page writes. I und...[Details]
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Mitsubishi PLC (Programmable Logic Controller) is a control device widely used in the field of industrial automation. In the Mitsubishi PLC system, input signals are very important components. They...[Details]
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On the morning of May 19, Apple announced that the first Apple retail store in Wuhan will officially open to customers on May 21 (this Saturday). This is also the first Apple retail store in Ch...[Details]
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1. Model: 2611B 2. Fault: Error message when starting up, code 5001, 5003, 5051, no output. 3. Analysis, testing and judgment: Error 5001 is a fatal error, and the error content is that the SMU ...[Details]
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1. Introduction Cardiovascular disease is currently the most harmful disease to humans, and the electrocardiogram is the main means and basis for the examination, diagnosis and prevention of t...[Details]
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Here is a summary of the three major functions of MMU:
1. Conversion from virtual address to physical address
2.Cache control
3. Memory access rights protection
The Linux kernel...[Details]