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Portable devices having a USB On-The-Go port may want to charge and access a USB peripheral simultaneously, yet having only a single port (both due to On-The-Go and space requirement) prevents this. Accessory charging adapters (ACA) are devices that provide portable charging power to an On-The-Go connection between host and peripheral. Part 2 - Electrical". MQP Electronics. Archived from the original on December 24, 2014 . Retrieved December 29, 2014. The Universal Serial Bus was developed to simplify and improve the interface between personal computers and peripheral devices, such as cell phones, computer accessories, and monitors, when compared with previously existing standard or ad hoc proprietary interfaces. [12]
Commission welcomes new EU standards for common mobile phone charger". Press Releases. Europa. December 29, 2010. Archived from the original on March 19, 2011 . Retrieved May 22, 2011. The Chinese technical standard: "YD/T 1591-2006, Technical Requirements and Test Method of Charger and Interface for Mobile Telecommunication Terminal Equipment" (PDF). Dian yuan (in Chinese). Archived from the original (PDF) on 15 May 2011.
chargers". EU: EC. 29 June 2009. Archived from the original on 23 October 2009 . Retrieved 22 June 2010. The Type-A plug. This plug has an elongated rectangular cross-section, inserts into a Type-A receptacle on a downstream port on a USB host or hub, and carries both power and data. Captive cables on USB devices, such as keyboards or mice, terminate with a Type-A plug. Technical Introduction of the New USB Type-C Connector". Archived from the original on December 29, 2014 . Retrieved December 29, 2014.
As of 2023, [update] USB consists of four generations of specifications: USB 1. x, USB 2.0, USB 3. x, and USB4. USB4 enhances the data transfer and power delivery functionality with Unfortunately, you usually cannot tell if a laptop’s USB-C port can deliver video just from looking at it. You’ll need to read the computer’s instruction manual or spec sheet or you could just experiment. USB currently has four major versions and three types. The version increments, from USB 1.0 through USB4, primarily mark speed increases. For example, the original USB 1.0 had a data rate of 1.5 megabits per second at a slow rate, increasing to 12 megabits per second at full speed. The data rate has improved significantly over the years, with USB 3.2 offering 20 gigabits per second. The most recent USB4 specification, released in 2019, will provide an impressive 40 gigabits per second when fully implemented through USB-C cables.a b "USB 2.0 Specification Engineering Change Notice (ECN) #1: Mini-B connector" (PDF). October 20, 2000. Archived from the original (PDF) on April 12, 2015 . Retrieved April 28, 2019– via www.usb.org. In May 2021, the USB PD promoter group launched revision 3.1 of the specification. [58] Revision 3.1 adds Extended Power Range (EPR) mode which allows higher voltages of 28, 36, and 48 V, providing up to 240 W of power (48 V at 5 A), and the "Adjustable Voltage Supply" (AVS) protocol which allows specifying the voltage from a range of 15 to 48 V in 100 mV steps. [71] [72] Higher voltages require electronically marked EPR cables that support 5 A operation and incorporate mechanical improvements required by the USB Type-C standard rev. 2.1; existing power modes are retroactively renamed Standard Power Range (SPR). In October 2021 Apple introduced a 140 W (28 V 5 A) GaN USB PD charger with new Macbooks. [73] Universal Charging Solution ~ GSM World". GSM world. Archived from the original on June 26, 2010 . Retrieved June 22, 2010.
The speed and wattage designation is a good step forward. They should make a standard cable that can handle all of the cases and make that the standard. VESA-Certified DisplayPort 1.4 has been pretty good, even though I had to replace DisplayPort cables fairly often. Often referred to as “male”, as they plug into a “female” port, it is important to understand that there are two elements of USB standard to consider; the physical connector shape and the underlying protocol (speed). USB Type A USB, or universal serial bus, is a protocol and hardware standard for digital communications. That means that the USB standard specifies both the actual form of cabling and connectors and the structure of the data that passes through them. The original standard was released in 1996. Furthermore, there are mini and micro versions of both USB-A and USB-B, which causes confusion because users need various different cables for basic use cases and may find it difficult to plug devices in for the first time. Or the second. USB-CThe first Power Delivery specification defined six fixed power profiles for the power sources. PD-aware devices implement a flexible power management scheme by interfacing with the power source through a bidirectional data channel and requesting a certain level of electrical power, variable up to 5A and 20V depending on supported profile. The power configuration protocol can use BMC coding over the CC wire if one is present, or a 24MHz BFSK-coded transmission channel on the V BUS line.
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