By Jan Axelson
Table of Contents
1. USB Basics
2. inside of USB Transfers
3. A move kind for each Purpose
4. Enumeration: How the Host Learns approximately Devices
5. regulate Transfers: based Requests for serious Data
6. Chip Choices
7. gadget Classes
8. How the Host Communicates
9. Matching a motive force to a Device
10. Detecting Devices
11. Human Interface units: Capabilities
12. Human Interface units: Reports
13. Human Interface units: Host Application
14. utilizing WinUSB for Vendor-Defined Functions
15. utilizing WinUSB's process INF File
16. utilizing Hubs to increase and extend the Bus
17. dealing with Power
18. checking out and Debugging
19. Packets at the Bus
20. electric and Mechanical Interface
21. Hosts for Embedded Systems
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Additional resources for USB Complete: The Developer's Guide (Complete Guides series)
USB three. zero supplementations, yet doesn’t exchange, USB 2. zero. Low, complete, and high-speed units proceed to conform with USB 2. zero and can’t reap the benefits of USB three. 0’s positive aspects corresponding to greater bus-current limits and bigger facts packets. thirteen bankruptcy 1 desk 1-2: Engineering switch notices (ECNs) right, upload to, and make clear the USB 2. zero specification. 6KVNG &CVG Mini-B Connector 10/2000 Errata 12/2000 Pull-up/Pull-Down Resistors (loosened tolerances) 05/2002 Interface organization Descriptor 05/2003 Rounded Chamfer for the Mini-B Plug (recommendation) 10/2003 Unicode UTF-16LE for String Descriptors 02/2005 Inter-Chip USB complement (chip-to-chip interconnects with no exterior cables) 03/2006 USB On-The-Go V1. three (defines units which could additionally functionality as hosts) 12/2006 Micro-USB connector 04/2007 hyperlink strength administration (optional energy saving features) 07/2007 Hi-Speed Interchip electric Specification (chip-to-chip interconnects with no 09/2007 exterior cables) droop present restrict alterations 04/2008 USB 2. zero Phase-locked SOFs 12/2008 5V brief Circuit face up to Requirement swap 12/2008 machine Capacitance 12/2008 fabric swap 12/2008 MicroUSB Micro-B identification Pin Resistance and Tolerance stack-up among D+ and D- 12/2008 seventy five$ 1P6JG)Q As USB grew to become the interface of selection for every kind of peripherals, builders started to ask for how for USB peripherals to entry different USB units. For instance, a consumer will need to connect a printer to a digital camera or a keyboard to a PDA. The On-The-Go (OTG) complement to the USB 2. zero Specification defines a limited-capability host functionality that units can enforce to let commu- nicating with USB peripherals. 9KTGNGUU seventy five$ builders who are looking to layout units with instant interfaces have a number of offerings. The instant USB Promoter Group’s instant common Serial Bus Spec- ification defines the qualified instant USB (WUSB) interface for communi- cating at as much as 480 Mbps. Cypress Semiconductor's WirelessUSB allows 14 USB fundamentals imposing instant units that functionality as low-speed USB units. one other alternative is to take advantage of an adapter that converts among USB and a instant interface equivalent to Zigbee, Bluetooth, or WiFi. $WU %QORQPGPVU USB communications require a number computing device with USB help, a number of units with USB ports, and hubs, connectors, and cables as had to attach the units to the host computing device. The host laptop is a laptop or different machine that incorporates a USB host con- troller and a root hub. The host controller codecs facts for transmitting at the bus and interprets bought info to a structure that operating-system parts comprehend. The host controller additionally is helping deal with communications at the bus. the foundation hub has a number of connectors for attaching units. the foundation hub and host controller jointly discover connected and got rid of units, perform requests from the host controller, and go info among units and the host controller. as well as the basis hub, a bus could have a number of exterior hubs.