The Universal Serial Bus - esterline.com

1 We make the input devices that control the OEM products that operate the Universal Serial BusWHITE PAPERHALT + HASSLASER-MARKINGSEALINGBACKLIGHTINGUSBU niversal Serial BusMaking User Interface Faster and Easier#11038 AID USB White PaperDRAFT V59/2/04 Advanced Input SystemsThe Universal Serial Bus, or USB,is a PC industry standard wayof simplifying user interface ofperipheral devices to a host Universal Serial BusMaking User Interface Faster and EasierImagine adding as many peripheral devices as you wantto a PC all with one common connector withoutregard to placement. Imagine plugging-in full-motionvideo to your host. Imagine swapping peripheral devicesat will without having to reboot the are the major benefits of the Universal Serial Universal Serial Bus, or USB, is a PC industry standardof simplifying the user interface of peripheral devices toa host PC.

2 Today, peripherals are connected to one ofmany ports on the back of a PC. Keyboards are connectedto keyboard ports, mice to mouse ports, monitors andprinters to Serial or parallel ports, speakers and microphonesto separate jacks, and so on. This is confusing to usersbecause of the wiring and cabling complexity. USBreplaces all of these types of connections with one, Universal port style. This means that the same type ofconnection can be used for all peripheral devices, includ-ing the mouse, monitor, keyboard, speakers, addition, a USB expands a system s capability by allowingthe host to communicate with multiple peripherals. Inthe old days, if a user wanted to have two differentserial devices or two different parallel devices hookedto his PC, he had to have an A/B switch box that allowedhim to manually change devices.

3 This was very USB supports multiple peripherals tied to a hub. Nomanual switching is and assigning an address to peripherals isaccomplished through a process called identifies each device and assigns it aunique address for communication with the enumerating, the USB ensures that the origin ofincoming information is linked to the correct peripheraldevice, and that outgoing information gets back tothe proper place. Because the enumeration processis continuous, the USB also allows the user to add orremove devices without powering down the system;the process is called hot swapping. Further, with a12 Megabit/second (Mb/s) pipe, the USB has nodifficulty supporting medium bandwidth peripheraldevices, including audio class devices like speakers ormicrophones.

4 With USB version out since April,2000, the bandwidth is upgraded to 480 Mb/s, enablingthe USB to handle high speed data informationtransfer, which provides the user with moreinformation involved with USB since 1998 Esterline,Advanced Input Systems is now working on thedevelopment of multiple design solutions that willenable even the most complex control panels touse the USB. These solutions, or common buildingblocks, will give our customers the ability to addmany types of peripherals to their user interfacewith little additional complexity in the design ofthe electrical Advanced Input Systems USB solutions includecustom hardware designs which can be scaled incomplexity. These designs integrate USB hubs andstand-alone USB devices to yield complete controlto the user innovation and flexibility from AdvancedInput Systems allows you to offer cutting-edgebenefits to the end user and that s what you dexpect from the leader in custom input Input Systems600 W.

5 Wilbur AvenueCoeur d Alene, ID 83815 more information, call 1-800-444-5923or visit look forward to working with your next projectand to help you understand the USB hardware/software solutions that are currently Input SystemsBecause the enumeration process is continuous, the USBalso allows the user to add or remove devices withoutpowering down the system, a process called hot swapping. Identifying and assigningan address to peripheralsis accomplished througha process called enumera-tion. Enumeration identifieseach device and assigns it aunique address for commu-nication with the host. 2004 Esterline Corporation. All rights reserved. Trademarksand trade names are property of their respective Input Systems reserves the right to make changes toproducts and services described herein without prior more information, call 1-800-444-5923or visit identifies deviceis attachedHost assigns uniqueaddress to deviceHost issues configurationto be used by deviceHost loads new firmwarefrom S/W fileHost begins enumeration againHost verifies newresources availableHost issues configurationto be usedDevice provides initialdevice descriptorsDevice disconnectsand reconnectsDevice provides updatedinformation to hostAdvanced Input Systems