Also known as USB standard A connector, the USB A connector is primarily be used on host controllers in computers and hubs. USB-A socket is designed to provide a 'downstream' connection intended for host controllers and hubs, rarely implemented as an 'upstream' connector on a peripheral device. This is because USB host will supply a 5V DC power on the VBUS pin. As such, it is important to remember while purchasing USB cables it is safest to make sure at least one of the plugs is a USB A.
The USB specification states that a maximum of 400 mV may be measured on the VBUS, USBDP, or USBDM when the device is not plugged into a USB port. In a self-powered application, if the 1.5 kΩ resistor was connected directly between the 3.3 V supply and the USBDP line, then the voltage on USBDP would exceed the 400 mV. USB On-The-Go specific information. Policies: Rules, regulations and policies governing the USB-IF Compliance Program: USB 3.x SuperSpeed: Information related to the USB 3.x Specifications and Compliance Program: USBCV: Information related to the USB Command Verifier, Device Framework, Hub Class, HID, Mass Storage Class, and Video Class tests. If you know your product’s Machine Type, but not its product type or product name, try looking it up using the “Quick Path” on the Lenovo Support site or on a Personal System Reference Sheet (PSREF). A Desktop is an “All-in-One Desktop” if the monitor is in the same case as the CPU.
Though not that common, USB A male to A male cables are used by some implementers to make connections between two USB A style female port. Be aware that typical A-A cables are not intended for connection between two host computers or computer to hub.
Usb Compliance Network & Wireless Cards Drivers
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