!!!!!!!!!!!! ! ! ! ! 7-Port USB Hub for Raspberry Pi User Manual ! ! ! Copyright!©!2016!UUGear!s.r.o.! ! All!rights!reserved.
!!!!!!!!!!!! Table!of!Content! Product!Overview!.................................................................................................!1! Package!Content!..................................................................................................!4! Specifications!.......................................................................................................!5! About!BackHPower!(Back!Feeding!Power)!...........................................................!6! About!Powering!Mode!.
!!!!!!!!!!!! Product!Overview! This! is! a! 7HPort! USB! hub! designed! for! Raspberry! Pi.! It! extends! one! USB! port! on! Raspberry! Pi! to! 7! usable! USB! ports,! which! allows! you! to! connect! much! more! USB! devices!to!your!Raspberry!Pi.! This! USB! hub! is! compatible! with! all! versions! of! Raspberry! Pi,!including! the! old!A/B! model,!A+/B+!model,!compute!module!(with!development!kit),!Raspberry!Pi!2!(B!model)! and!Raspberry!Pi!Zero.
!!!!!!!!!!!! want!to!connect!to!your!Raspberry!Pi:! ! ! Keyboard! Mouse! ! ! Wi5Fi!Dongle! 3G!Dongle! ! ! Flash!Drive! ! Portable!Hard! Disk! USB!Audio!Card! ! Bluetooth! Adapter! ! SD!Card!Reader! ! ! USB!Logic! Analyzer! Arduino!Board! ! USB!Camera! Of! course! you! may! not! want! to! connect! all! of! them! at! a! time.! The! point! is! that! sometimes!you!may!need!more!than!4!USB!ports.
!!!!!!!!!!!! ! 1~7)! Downstream!USB!port!with!green!LED!as!activity!indicator! 8)! Upstream!USB!port! 9)! Power!link!jumper! 10)! MicroHUSB!DC!5V!power!in! 11)! Red!LED!as!power!indicator! 12)! Alternative!DC!5V!power!in! 13)! Pogo!pin!holder!(+5V)! 14)! Pogo!pin!holder!(GND)! 15)! 4x2!header!for!digital!output!pins!(port!state)! ! ! 3! !
!!!!!!!!!!!! Package!Content! Each!package!of!this!USB!hub!contains:! !! 7Hport!USB!hub!board!x!1! !! USB!to!mini!USB!cable!x!1! !! Crown!head!pogo!pin!x!2! !! M2.5!x!10+6mm!Copper!Standoff!x!4! !! M2.5!screws!x!4! !! M2.
!!!!!!!!!!!! Specifications! Dimension:! ! 85mm!x!56mm!x!10mm! Weight! 29g!(net!weight!without!any!accessory)! Standards! Data!Speed! USB!Ports! LED!Indicators! Multiple!Transaction!Translator!(MTT)! USB!v1.1:!12!Mbps! USB!v2.0:!480!Mbps! Upstream:!1!(miniHUSB)! Downstream:!7! Power:!1!(red)! Port!Activity:!7!(green)! Power!Mode! BusHPower!/!SelfHPower! Output!Voltage! DC!5V! Output!Current! ! USB!Specification!Revision!2.0!and!1.
!!!!!!!!!!!! About!Back5Power!(Back!Feeding!Power)! BackHpower! (or! back! feeding! power)! here! means! the! USB! hub! provides! electronic! power! to! Raspberry! Pi.! This! can! only! (optionally)! happen! when! the! USB! hub! gets! power!supply!connected!(works!in!selfHpower!mode).!The!advantage!of!backHpower!is! that!you!only!need!one!power!supply!to!power!both!the!USB!hub!and!Raspberry!Pi.
!!!!!!!!!!!! Self5Power!Mode! If!you!connect!the!power!supply!to!the!micro!USB!port!(power!in)!on!the!USB!hub,! the!USB!hub!will!work!in!selfHpower!mode,!or!say!it!becomes!a!powered!USB!hub.!In! this!case!the!maximum!output!current!for!all!USB!ports!are!2,000mA.! If!the!USB!hub!is!also!backHpowering!your!Raspberry!Pi,!the!current!consumed!by! Raspberry!Pi!is!also!taken!into!account.!For!example,!if!Raspberry!Pi!consumes! 260mA,!then!the!maximum!output!current!for!all!USB!ports!will!become!1,740mA.
!!!!!!!!!!!! Usage!Guide! This!USB!hub!can!work!with!all!models!of!Raspberry!Pi.!However,!the!mounting!and! wiring!may!be!different!for!various!models.!Please!read!the!sections!below!for!details.! Raspberry!Pi!Model!A!and!B! The!old!models!of!Raspberry!Pi!(A!and!B!model)!only!have!two!mounting!holes,!so!we! only!need!two!sets!of!copper!standoff,!screw!and!nut!to!mount!the!USB!hub!under!it.! The!pogo!pins!should!not!be!used!in!this!case.
!!!!!!!!!!!! power!both!the!USB!hub!and!your!Raspberry!Pi.! ! ! If!you!don’t!want!the!backHpowering,!you!can!disable!it!by!putting!the!jumper!on!another! side.!By!doing!so,!you!will!need!two!power!supplies,!one!for!the!USB!hub!and!the!other! one!for!your!Raspberry!Pi.
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!!!!!!!!!!!! Raspberry!Pi!B+!and!Raspberry!Pi!2!(B!Model)! Raspberry!Pi!B+!and!Raspberry!Pi!2!(B!model)!have!four!mounting!holes!on!board,!so! we!can!use!four!sets!of!copper!standoff,!screw!and!nut!to!mount!the!USB!hub!under! it.!The!pogo!pins!will!be!used!if!you!want!the!USB!hub!to!backHpower!your!Raspberry! Pi.! After! putting! the! USB! hub! under! Raspberry! Pi,! you! can! place! the! copper! standoffs! between! the! USB! hub! and! Raspberry! Pi! (align! to! the! 4! mounting! holes).
!!!!!!!!!!!! ! Make!sure!the!pogo!pin!on!the!right!contacts!with!the!most!rightHtop!pin!(+5V)!and! the!pogo!pin!on!the!left!contacts!with!the!most!leftHbottom!pin!(GND).!Thus!when!you! power!the!USB!hub,!it!will!also!power!your!Raspberry!Pi.! Remarks:!don’t!let!the!pogo!pin!touches!any!other!pin!in!the!header,!or!it!might!damage! your!Raspberry!Pi!! Use!the!USB!H!mini!USB!cable!to!connect!a!USB!port!on!Raspberry!Pi!and!the!mini! USB!port!on!the!USB!hub,!then!it!will!be!ready!to!work.
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!!!!!!!!!!!! Raspberry!Pi!A+! Raspberry!Pi!A+!has!the!same!mounting!holes!with!B+!model,!so!the!process!to!mount! the!USB!hub!under!it!will!be!quite!similar.!The!board!of!Raspberry!A+!is!shorter,!but!it! wouldn’t!be!a!problem.! ! Different!than!the!B+!model,!Raspberry!Pi!A+!supports!backHpowering!via!USB!port.! So!it!is!not!necessary!to!use!those!pogo!pins!for!backHpowering.
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!!!!!!!!!!!! Raspberry!Pi!Compute!Module!(with!Development!Kit)! The! Raspberry! Pi! compute! module! is! supposed! to! be! inserted! into! another! product! and!it!doesn’t!have!any!USB!port!on!its!board.!However!if!you!are!developing!a!product! that! uses! Raspberry! Pi! compute! module,! you! should! also! have! a! development! kit,! which!allows!you!to!plug!the!compute!module!on!a!development!board!and!access!the! USB!port!on!it.
!!!!!!!!!!!! If!you!don’t!want!the!backHpowering,!just!put!the!jumper!to!the!other!side!and!connect! two!power!supplies!to!USB!hub!and!the!development!board!accordingly.
!!!!!!!!!!!! Raspberry!Pi!Zero! Raspberry!Pi!Zero!has!4!mounting!holes,!but!only!two!of!them!could!be!used!to!mount! the!USB!hub!under!it.! Raspberry!Pi!Zero!supports!backHpowering!via!the!data!USB!port,!so!you!can!just!put! the! jumper! to! “Power! Link”! position! and! connect! power! supply! to! the! USB! hub.! To! connect!the!upstream!USB!port!to!Raspberry!Pi!Zero’s!data!USB!port,!you!will!need!a! USB!H!OTG!adapter!(not!included!in!the!package).
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!!!!!!!!!!!! Monitoring!USB!Port!Usage! There!is!a!4x2!header!on!the!USB!hub!board,!which!has!label!“Port!State”.!This!header! contains!7!digital!output!pins!and!a!GND!pin.!The!output!pins!are!in!3.3V!level!and!can! directly!connect!to!Raspberry!Pi’s!GPIO!pins.!By!monitoring!the!voltage!level!of!these! output!pins,!your!program!knows!the!status!of!the!7!USB!ports,!and!can!tell!which!USB! port!has!a!USB!device!newly!plugged!to!or!unplugged!from.
!!!!!!!!!!!! Integrates!with!Witty!Pi! Witty! Pi! is! another! UUGear! product,! which! is! a! small! extension! board! that! can! add! realtime! clock! and! power! management! to! Raspberry! Pi.! It! can! be! mounted! above! Raspberry!Pi!by!connecting!to!the!40Hpin!GPIO!header.! ! ! Since!this!USB!hub!can!be!mounted!under!Raspberry!Pi,!it!has!no!conflict!with!Witty! Pi.!Instead!it!can!be!easily!integrated!into!the!Witty!Pi!+!Raspberry!Pi!combination!and! become!a!nice!sandwich!structure.
!!!!!!!!!!!! The!integration!is!quite!simple,!just!mount!Witty!Pi!over!Raspberry!Pi!and!mount!the! USB!hub!under!Raspberry!Pi,!you!can!do!either!part!first.!The!Witty!Pi!comes!with!4! femaleHfemale!standoffs,!while!the!USB!hub!comes!with!4!femaleHmale!standoffs,!thus! they!could!be!connected!together!and!has!Raspberry!Pi!board!in!the!middle.! ! ! ! Since!Witty!Pi!is!the!power!manager,!it!should!be!the!only!one!that!gets!connected!to! the!power!supply.
!!!!!!!!!!!! used!to!make!sure!the!USB!hub!can!work!in!selfHpower!mode,!otherwise!the!USB!hub! can!only!pull!power!via!the!upstream!USB!port,!which!can!only!provided!very!limited! current.! ! For!Raspberry!Pi!A,!B!and!compute!module!with!development!kit,!Witty!Pi!could! not!be!mounted!on!them!because!of!the!incompatible!GPIO!pin!header.!Also!they!could! not!use!the!pogo!pins!to!power!the!USB!hub,!so!the!USB!hub!can!only!work!in!busH power!mode.
