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October 28, 2022, Shanghai News - On October 28, Shanghai Hualing Integrated Circuit Technology Co., Ltd. (hereinafter referred to as: Hualing Shares) successfully listed on the Beijing Stock Exchang...[Details]
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In judging the growth and vitality of a company, in addition to looking at the levels of revenue and net profit, factors such as business model, R&D level, accounts receivable, cash flow, gross profi...[Details]
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Most LED power supply circuits are composed of a switching power supply circuit + feedback circuit. The feedback circuit samples the load and adjusts the duty cycle or frequency of the switching c...[Details]
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According to foreign media reports, well-known Apple whistleblower Mark Gurman said that Apple is stepping up internal testing of its first Mac Pro equipped with Apple Silicon chips in preparation fo...[Details]
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describe
The LTC®6084/LTC6085 are dual/quad, low cost, low offset, rail-to-rail input/output, unity-gain stable CMOS operational amplifiers with 1pA input bias current.
A 1.5MHz gain bandwidt...[Details]
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Cloud computing, smartphones, and LTE services have led to a significant increase in network traffic. To support this increased traffic, the speed of IT equipment, such as those used in data centers,...[Details]
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Problems with AND or NOT operations
PE_ODR &= 0XFE; //Clear the 0th bit, output low level
PD_ODR &= 0XF7; //Clear the 3rd bit, output low level
I didn't know why it was written like this before!...[Details]
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Recently, some users have reported that Apple's new iPad mini 6 has a jelly screen problem in portrait mode. Specifically, when dragging the screen up and down, there is an obvious and unsynchr...[Details]
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0 Introduction
With the rapid development of social economy and science and technology, electric locomotives, subways and electric vehicles will be widely used. The power conversion and cont...[Details]
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According to Bloomberg, people familiar with the matter revealed that Apple is negotiating with several autonomous driving lidar suppliers to apply the latest generation of lidar technology to its fi...[Details]
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BOE's influence in the global smartphone OLED market is growing. According to NH Investment & Securities' forecast, the company's OLED panel shipments will grow by 50% this year. BOE's share of the g...[Details]
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1. arm-linux-gcc
Common parameters: -o -c -g -xO -w/W (warning level)
arm-linux-gcc -o dest source, directly compile the executable file elf format
arm-linux-gcc -o dest source ...[Details]
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In the previous section, the kernel framework introduction and simple modification of S3C2440 transplanted linux3.4.2 kernel. We simply configured the kernel. In this section, we will continue to mod...[Details]
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As the third generation of lighting sources, LED has the advantages of low operating voltage, low power consumption, high luminous efficiency and long life. LED is a nonlinear device. When the LED ...[Details]
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1. Hardware Solution This system consists of STC89C52 single-chip microcomputer, 44 matrix keyboard, buzzer, reset circuit and crystal oscillator circuit, relay, etc. The 44 keyboard is mainly used f...[Details]
Mobile and portable
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