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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. Main article: USB-C The USB-C plug USB cable with a USB-C plug and a USB-C port on a notebook computer USB Mini are further divided into two variants: USB Mini A (or Mini USB A) and USB Mini B. These are smaller counterparts of Type A and Type B USB connectors. They are designed for their compact size, which makes them handy for smaller devices. USB Mini A and USB Mini B connectors. (Photo Credit: Wikimedia Commons) ACAs have three ports: the OTG port for the portable device, which is required to have a Micro-A plug on a captive cable; the accessory port, which is required to have a Micro-AB or type-A receptacle; and the charging port, which is required to have a Micro-B receptacle, or type-A plug or charger on a captive cable. The ID pin of the OTG port is not connected within plug as usual, but to the ACA itself, where signals outside the OTG floating and ground states are used for ACA detection and state signaling. The charging port does not pass data, but does use the D± signals for charging port detection. The accessory port acts as any other port. When appropriately signaled by the ACA, the portable device can charge from the bus power as if there were a charging port present; any OTG signals over bus power are instead passed to the portable device via the ID signal. Bus power is also provided to the accessory port from the charging port transparently. [50] USB Power Delivery [ edit ] The USB Type-C Charging logo ( USB4 20Gbps port) USB PD Rev. 1.0 source profiles [55] Profile
Full-featured USB-C 3.1 cables are electronically marked cables that contain a full set of wires and a chip with an ID function based on the configuration data channel and vendor-defined messages (VDMs) from the USB Power Delivery 2.0 specification. USB-C devices also support power currents of 1.5A and 3.0A over the 5V power bus in addition to baseline 900mA; devices can either negotiate increased USB current through the configuration line or they can support the full Power Delivery specification using both BMC-coded configuration line and legacy BFSK-coded V BUS line. [ citation needed] The following 10 biggest mobile phone companies have signed the MoU: Apple, LG, Motorola, NEC, Nokia, Qualcomm, Research In Motion, Samsung, Sony Ericsson, Texas Instruments (press release), Europa, archived from the original on July 4, 2009 What is the Maximum Length of a USB Cable?". Techwalla.com. Archived from the original on December 1, 2017 . Retrieved November 18, 2017.There are two types of micro USB connectors: Micro-A and Micro-B. Both have a similar width and approximately half the height of their mini USB counterparts.
Battery Charging v1.2 Spec and Adopters Agreement" (Zip). USB Implementers Forum. March 15, 2012. Archived from the original on October 6, 2014 . Retrieved May 13, 2021.
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The initial versions of the USB standard specified connectors that were easy to use and that would have acceptable life spans; revisions of the standard added smaller connectors useful for compact portable devices. Higher-speed development of the USB standard gave rise to another family of connectors to permit additional data paths. All versions of USB specify cable properties; version 3. x cables include additional data paths. The USB standard included power supply to peripheral devices; modern versions of the standard extend the power delivery limits for battery charging and devices requiring up to 240 watts. USB has been selected as the standard charging format for many mobile phones, reducing the proliferation of proprietary chargers.
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