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The difference between RS232 ports and RS485 ports Physical structure of the ports 1. RS232 ports One of the computer communication interfaces, usually the RS-232 interface appears in the form of 9 pins (DB-9) or 25 pins (DB-25). Generally, there are two sets of RS-232 interfaces on a personal co...Read more »
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Analysis of DB9 serial line definition The cable of the DB9 port is commonly used in serial communication. This article will focus on the definition, testing, products and connection methods of the DB9 port, and introduce the DB9 port in detail. 1>DB9 port definition Serial communication main...Read more »
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The difference between a card reader and a USB flash drive Card Reader is a card reading device that needs to be used with a matching memory card (storage medium), including our common SD card, TF card, CF card, etc. It can be simply understood that the card reader is the bridge between the memor...Read more »
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What brand of card reader should I buy? How to choose a card reader? When it comes to mobile phone card readers, everyone must think that it is an outdated product. Nowadays, mobile phones do not need memory cards, but photography enthusiasts still need a card reader. The photos of the ca...Read more »
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The hard disk is a medium used by the computer to store data. The hard disk is divided into ordinary PC and server. With the popularity of high-speed solid-state drives, the hard disk interface is also different, so how many desktop hard disk interfaces are there? How to check the desktop hard di...Read more »
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This article mainly describes the solution to the problem of disk stalls that may be encountered when using the new SAS hard disks in SAS hard disk enclosures or hot-swap server hard disk racks. The principle is very simple, it only needs to shield the signal of the pin3 part of the power supply ...Read more »
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SAS (Serial Attached SCSI) is Serial Attached SCSI. It is a new generation of SCSI technology. It is the same as the popular Serial ATA (SATA) hard disk. Both use serial technology to obtain higher transmission speed, and shorten the connection line. Improve interior space, etc. SAS is a new inte...Read more »
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What are the advantages and characteristics of the SAS interface? SAS (Serial Attached SCSI) is Serial Attached SCSI. It is a new generation of SCSI technology. It is the same as the popular SerialATA (SATA) hard disk. It adopts serial technology to obtain higher transmission speed and improves b...Read more »
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What is the difference between the PCIE interface and the U2 interface except for the connection form of the SSD of the same specification? 1.There is no difference. 2.Simply because the U.2 solid state requirement is small. 3.The performance is exactly the same. 1>Physical form factor: AIC (P...Read more »
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The main parameters of the hard disk Buying a hard drive mainly depends on three parameters: hard drive type, interface type, storage capacity. The type of hard disk depends on the use. For large-scale throughput calculations, solid-state is naturally required, because it has a very high transmis...Read more »
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The relationship between sas and sata interfaces and HBA and Raid All disks behind the HBA are directly connected, and the performance only depends on the HBA itself. HBA+SAS expander will go through the middle of the expander, of course, there will be a delay, and the total bandwidth will be af...Read more »
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USB-C works great, but the iPhone wants a future without ports Following the 3.5mm headphone jack, Apple is preparing to replace another port for the iPhone this year. The difference from the previous one is that this time the replacement is not on the iPhone body, but on the interface of the sup...Read more »
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Will the iPhone use the USB-C port? The iPhone first sale day was the same as in previous years, and there were still a large number of consumers queuing up at different Apple Stores everywhere, and the stores were full of people, and the store staff were busy setting up their new iPhone 12 for t...Read more »
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What protocol does the video output from the USB-C interface use? In the USB-C port, there are only two types that can run a large amount of data, 1 pair of low-speed lines compatible with usb2.0, and 4 pairs of high-speed lines. The USB-C interface supports DP Alt output, and now supports up to...Read more »
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The difference between USB-C and Thunderbolt3 Connector Translated into Chinese, USB-C is probably "Universal Serial Bus Type-C Interface", which, as the name suggests, is an interface. This interface supports the USB protocol, but compared with the Type A interface (A port), the C port exceeds t...Read more »
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USB Type-C is a specification for a USB connector system that is gaining popularity on smartphones and mobile devices and is capable of power transfer and data transfer. Unlike USB's earlier offerings, it's also reversible - so you don't have to try plugging it in multiple times. 1.What is USB-T...Read more »
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How to connect the cable between the monitor and the host？ Your host supports three interfaces, which are DVI-D, VGA, and HDMI interface data cables for connection. The monitor also supports three interfaces, namely DVI-D, VGA, and HDMI interfaces, so you can connect through VGA cables. , you ca...Read more »
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PCIe 3.0 and PCIe 4.0 are different versions of the data bus transmission protocol. Which version a system uses to transmit signals is determined by the joint “discussion” of the CPU/motherboard chipset/graphics card, and it is downward compatible if you choose the low or the high. You only need ...Read more »
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Yes, you can use USB HUB to connect the mouse and keyboard at the same time! What does it mean to have fewer USB ports on a laptop? Common USB peripherals such as keyboard and mouse, U disk, mobile hard disk, etc. have to be pulled and pulled out frequently. This operation is not only very troubl...Read more »
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It seems that few consumer electronics features generate as much grudge as a phone charger socket. For those of us with Android phones, the world has been slowly transitioning from micro-USB to USB-C over the past few years, and iPhone users look to their Lightning connector as the ultimate in c...Read more »
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Why are all USB hubs 4 ports? First introduce a concept: "Transaction Translators", there are in each Hub, it is responsible for transmitting data in the hub, we call it "TT". In the Hub, there are two ways to set TT, one is called Single TT, and the other is called Multi TT. 1>Single TT means...Read more »
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Dose the multi-port USB-HUB affect the data transfer speed? Theoretically speaking, it will definitely decrease, but the actual situation is not necessarily. Each downstream interface of the USB Hub will equally divide the bandwidth of the upstream interface, and the USB Hub itself also needs to ...Read more »
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Types of data cable connectors/USB types chart There are many types of data interfaces. From the early USB 1.0 to the current USB 3.0 protocol, it has undergone a long historical evolution and witnessed the progress of science and technology. The following is a detailed introduction to the types ...Read more »
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Summary of advantages and disadvantages of MINI USB 10pin male header I believe that many friends are still relatively unfamiliar with mini usb10PIN products, but they are no strangers to mini USB. MINIUSB, also known as mini USB, is a USB interface standard, which is a technology developed for t...Read more »
