Now I have such a problem. When I used AD before, I could directly copy and paste the pcb package to another pcb package interface to compare the package size. But in Mentor Graphics, why can't I move...
Normally, you can jump to the function definition by right-clicking the function name-go to definition of '*****'. If the jump fails, it can be roughly divided into the following two situations.1. Som...
Download details: TE White Paper: The Importance of Pressure Sensors in HVACR SystemsIntroductionSensors are an integral part of most Heating, Ventilation, Air Conditioning and Refrigeration (HVACR) s...
[align=left][color=rgb(51, 51, 51)]We often see some design principles about high-frequency and high-speed signals in textbooks or original PCB Design Guides, including not running high-speed signal l...
Recently, I used the stm32f407 and lan8720a chips to make an mqtt client board. mqtt uses the client version of lwIP, which is integrated with the freeRTOS and iwIP solutions of stm32cube. At the begi...
Summary: We are actually exposed to many operating systems, such as windows, Android, IOS, and Linux, all of which are operating systems. The microcontroller also has its own operating system, called...[Details]
CMMB (STiMi) is a mobile multimedia broadcasting system standard developed completely independently by China.
[Standard number:
CMMB GY/T 220.1/2006, GY/T 220.2/2006].
...[Details]
IntroductionTD
-SCDMA uses time division duplex (TDD). For TDD communication systems, high-quality transceiver switches are key modules of the RF front-end circuit. In order to improve...[Details]
//The following program experience can be used, MCU: M16, crystal: 8M, directly use the male connector (needle) on the USB to serial port cable,
//The second pin (RXD) is connected to the PD1 port (1...[Details]
Keysight Technologies is the First to Receive OmniAir Qualified Test Equipment Qualification to Accelerate C-V2X Device Certification Verify C-V2X capabilities of onboard and roadside equipment to ...[Details]
Intel has been named one of Forbes' 2020 "World's Most Valuable Brands" and ranked 12th among 100 companies in all industries around the world, up one place from 2019. According to Forbes' calculatio...[Details]
OZ9RR is a backlight high-voltage inverter PWM control chip produced by OZMicro, with the following features: constant operating frequency, which can be synchronized by external signals; built-in sync...[Details]
On November 10, security company Trend Micro recently discovered that the CMU (Connect Connectivity Master Unit) system of many models of Japanese automaker Mazda has multiple high-risk vulnerabili...[Details]
1 clock cycle = 1/crystal frequency M
1 machine cycle = 12 (12T for 51 series, 1T is 1) X clock cycle = 12 (1) X (1/crystal frequency M) = 1 us (1/12 us)
Number of pulses in 1us machine cycle = cry...[Details]
On June 18, according to the latest industrial and commercial data, Huawei's Haobo Investment has newly invested in Changzhou Fuxin Technology Co., Ltd., with a shareholding ratio of 10%. It is worth...[Details]
The CPU of the 8051 microcontroller is composed of an arithmetic unit and a controller. 1. Arithmetic Unit The arithmetic unit is centered on the ALU, which is used to perform binary ari...[Details]
0 Introduction
Digital filter is a digital system used to filter discrete time signals. It achieves the purpose of frequency domain filtering by mathematically processing the sampled data....[Details]
In today's GHz-rate serial data testing, eye diagram and jitter testing are the two most important test items. In eye diagram and jitter measurement, the test instrument must recover the reference cl...[Details]
Since the beginning of this year, Neijiang City has emphasized the priority of industry and manufacturing, adhered to the guidance of new industrialization, implemented the industrial doubling plan in...[Details]
PCB Design
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