Changes between Version 20 and Version 21 of USB
- Timestamp:
- 02/22/2023 11:51:02 PM (20 months ago)
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USB
v20 v21 24 24 [=#speed] 25 25 == USB Speeds == 26 The following is a set of supported speeds per USB specification:26 The following is a set of supported theoretical speeds per USB specification: 27 27 * **USB !LowSpeed** (1.5mbps) (USB 1.0 UHCI/OHCI) - Only supports Control and Interrupt transfer types 28 28 * **USB !FullSpeed** (12mbps) (USB 1.0 UHCI/OHCI) 29 29 * **USB !HighSpeed** (480mbps) (USB 2.0 EHCI) 30 30 * **USB !SuperSpeed** (5000mbps) (USB 3.0 XHCI) 31 32 Note that the USB software stack and chipset vendor host controller implementation have overhead that reduce actual USB performance from theoretical bandwidth. Embedded SoC's typically do not prioritize USB performance like modern desktop computers. Additionally there may be Linux build-time and run-time tuning that can be done that affect performance. 31 33 32 34