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a u9226 usb kvm controller t e c hnical r e f e r ence manual
AU9226 usb kvm controller
c c o o p p y y r r i i g g h h t t copyright ? 1997 - 2007. alcor micro, corp. all rights reserved. no part of this data sheet may be reproduced, transmitted, transcribed, stored in a retrieval system or translated into any language or computer l anguage, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without prior written permission from alcor micro, corp. t t r r a a d d e e m m a a r r k k a a c c k k n n o o w w l l e e d d g g e e m m e e n n t t s s the company and product names mentioned in this document may be the trademarks or registered trademarks of their manufacturers. d d i i s s c c l l a a i i m m e e r r a lcor micro, corp. reserves the right to change this product without prior notice. alcor micro, corp. makes no warranty for the use of its products and bears no responsibility for any error that appear in this document. specifications are subject to change without prior notice. r r e e v v i i s s i i o o n n h h i i s s t t o o r r y y date revision description july 2007 1.00w official release oct 2007 1.01w modify ?3.0 pin assignment? c c o o n n t t a a c c t t i i n n f f o o r r m m a a t t i i o o n n : : web site: http://www.alcormicro.com/ taiwan china shenzhen office alcor micro, corp. rm.2407-08, industrial bank building 4f, no 200 kang chien rd., nei hu, no.4013, shennan road, taipei, taiwan, r.o.c. shenzhen,china. 518026 phone: 886-2-8751-1984 phone: (0755) 8366-9039 fax: 886-2-2659-7723 fax: (0755) 8366-9101 santa clara office los angeles office 2901 tasman drive, suite 206 9070 rancho park court santa clara, ca 95054 rancho cucamonga, ca 91730 usa usa phone: (408) 845-9300 phone: (909) 483-8821 fax: (408) 845-9086 fax: (909) 944-0464

i table of contents 1. introduction ............................................................ 1 1.1 description ...................................................................................1 1.2 features ........................................................................................1 2. application block diagram ................................... 2 3. pin assignment ...................................................... 3 4. system architecture and reference design ....... 7 4.1 AU9226 block diagram ...............................................................7 5. hot key definition .................................................. 8 5.1 [scroll]++[scroll] mode ...............................................................8 5.2 [caps]++[caps] mode ..................................................................8 5.3 [num]++[num] mode ...................................................................9 5.4 [ctrl]+[shift] mode (left-hand side) ............................................9 6. electrical characteristics ...................................... 11 6.1 recommended operating conditions .......................................11 6.2 general dc characteristics ........................................................11 6.3 dc electrical characteris tics of 3.3v i/o cells ..........................11 6.4 crystal oscillator circui t setup for characterization ...............12 6.5 esd test results .........................................................................12 6.6 latch-up test results .................................................................13 7. mechanical information ......................................... 15 7. abbreviations ......................................................... 16
ii list of figures figure 2.1 block diagram ..................................................................2 figure 3.1 pin assignment diagram ................................................3 figure 4.1 AU9226 block diagram ...................................................7 figure 6.1 crystal oscillator circ uit setup for characterization ...12 figure 6.2 latch-up test circuits ....................................................14 figure 7.1 mechanical information diagram ...................................15 list of tables table 3.1 pin descriptions ................................................................4 table 6.1 recommended operating conditions .............................11 table 6.2 general dc characteristics ..............................................11 table 6.3 dc electrical characteristics of 3.3v i/o cells ...............11 table 6.4 esd data ............................................................................12 table 6.5 latch?up data ...................................................................14
AU9226 usb kvm controller v1.01w 1 1. introduction 1 1 . . 1 1 d d e e s s c c r r i i p p t t i i o o n n AU9226 is a highly integrated single chip usb kvm controller offering users the possibility of sharing keyboard, mouse and monitor among up to two pcs. not like traditional ps2 kvm devices, AU9226 uses usb as its upstream and downstream interface to support its driver-free and plug-n-play features, which allow users to easily install and use the kvm. typical application of AU9226 is under an environment, in which only one set of monitor, keyboard and mouse is availabl e. applying such kind of devices in a computing environment will not only result in a centralized control, but also reduce the power and space consumption. 1 1 . . 2 2 f f e e a a t t u u r r e e s s fully usb v1.1 specification compliant support usb bus power and device self power support up to 2 pcs via 2 usb upstream ports support usb downstream port 1 for usb keyboard support usb downstream port 2 for usb mouse support ps2 keyboard support both ?panel button? and ?hot key? to switch among pcs support ?auto-scan? mode for users to monitor pcs easily support audio beep when system switches support upstream port selected led indicators for each pc respectively support phantom keyboard to let user does not need to configure bios to turn on ?no halt on error? support 2 different sets of key sequence to switch among pcs (please see the key definition in the following) recalls ?caps lock?, ?num lock? and ?scroll lock? keys? status for each pc automatically output the monitor selection signals to the external video-switching circuits support 8-bit mcu interface to provide control from external mcu support serial mcu interface to pr ovide control from external mcu no need to install device driver under windows, macintosh, linux, freebsd and sun system support eeprom to memorize hotkey mode
2. application block diagram t y pical application is in a computing environment where it demands a centralized control and sp ace & energy saving is critica l . figure 2.1 block diagram a u 9 226 k v m p o r t 1 po r t 2 mo nit or a nd a udi o swt ich ing bo x ( rel ay d evi ce ) mo n i to r pc 2 pc 1 mo u s e k e yb oa r d m o n i to r c a b le u s b cab l e u s b cab l e m o n ito r c a b l e s e l e c t i o n ( 3x) d e f a u l t b u tto n x 1 a u to - s w t ich m o d e p s 2 k e yb oa r d au d i o de v i c e s AU9226 us b kvm controller v1.01w 2
3. pin assignment the AU9226 is delivere d in 48pin l q fp form fa ctor . docu mented below is a figure shows signa l names of e a ch pin and a t able in th e following p age describes each p i n in more det ails. figure 3.1 pin assignment diagram av cc avs s xta l 1 xta l 2 vcc 5 v bv cc b vss sw i t chn audi osw i t c hn bus _ pw r d bee p int n vc c swi t chmode 0 swi t chmode 1 ps2_clk ps 2 _ dat gpo1 gpo0 gpo2 vs s dow n usb 1_dp downu s b2 _dm wrn downu s b 1_d m rd n csn gnd al e dow n usb 2_dp gn d moni tore n0 d7 up usb 1 _d p up us b1 _ d m up usb 2 _d p u p usb 2_dm up 1 l e d n 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 5 1 6 17 18 19 20 2 1 2 2 23 24 25 26 27 28 29 30 31 32 33 35 36 34 37 38 39 40 41 42 43 44 45 46 47 48 AU9226 swi t chmode 2 ex t c pu mod d0 d1 d2 d5 d4 d3 d6 up2l e d n au922 6 usb kvm control l er v1.01 w 3
table 3.1 pin descriptions pin # pin name i/o descriptio n 1 av c c pwr 3.3v analog input power 2 av s s pwr analog ground 3 xt al1 i 12 mhz crys t a l input 4 xt al2 o 12 mhz crys t a l output 5 vcc5v pwr 5.0v input p o wer from usb port 6 bvcc pwr 3.3v output power from i n ternal regulator 7 bvss pwr ground pin of internal re gulator 8 switchn i button with internal pull-up for switching to next system (0: enable; 1: normal) 9 audi oswi tchn i audio on/ o ff switch with inter nal pull-up (1: off; 0: on) 10 bus_pw rd i bus power selection (1: device self power; 0: bus power) 11 beep o audio output (4 khz frequency) when system switches 12 intn o interrupt signal output to external mcu wh en switchmode2='1' and ex t c pumod='1' (falling-edge triggered) 13 gnd ground 14 gnd ground 15 ale i when not using external p a rallel mcu, it should be pulled do wn. address latch enable when switchmode2='1' and ex t c pumod='1' (1: a d bus is addre ss; 0: ad bu s is dat a) 16 csn i chip enable for the mcu interface wh en switchmode2='1' an d ex tcpumod='1' (0: enable) 17 rdn i read strobe for the mcu i n terface when switchmode2='1' an d ex tcpumod='1' (0: enable) 18 down usb 2_dp i/o downport2 dp 19 down usb 2_dm i/o downport2 dm 20 down usb 1_dp i/o downport1 dp 21 down usb 1_dm i/o downport1 dm 22 wrn i read strobe for the mcu i n terface when switchmode2='1' and ex tcpumod ='1' (0: enable; 1: normal) 23 ex tc pu mo d i external mcu mode selection (1 : parallel; 0: serial). serial is the def ault mode. 24 vss pwr digit a l ground AU9226 us b kvm controller v1.01w 4
pin # pin name i/o descriptio n 25 vcc pwr 3.3v digit a l input power 26 switch mode0 i 27 switch mode1 i switch mod e selection (sw0, sw1) for intern al hotkey mo de when switchmode2='0' an d d2='0', it? s d e fined as: (0, 0): [scroll][scroll] mode (default) (0, 1): [cap s lock][cap s lock] mode (1, 0): [num lock][num lock] mode (1, 1): [c trl ][s hift ] mo de (lef t-hand side) 28 switch mode2 i enable external mcu mode (1: enable; 0: disable). disable is the default setting. 29 ps2_clk i/o ps2 clock signal (external pull-up re quired) 30 ps2_da t i/o ps2 dat a signal (external pull-up re quired) 31 d0 i/o bit 0 with internal pull-up in addre ss/dat a bus of mcu interf ace when switchmode2='1' an d ex tcpumod='1'. it also provides alternative functions: i2c bus sda signal (slave mode) wh en switchmode2='1' and ex t c pumod='0' i2c bus sda signal (master mode) wh en switchmode2='0' and d2='1' 32 d1 i/o bit 1 with internal pull-up in addre ss/dat a bus of mcu interf ace when switchmode2='1' an d ex tcpumod='1'. it also provides alternative functions: i2c bus scl signal (slave mode) wh en switchmode2='1' and ex t c pumod='0' i2c bus scl signal (master mode) wh en switchmode2='0' and d2='1' 33 d2 i/o bit 2 with internal pull-do wn in address/dat a bus of mcu interf ace when switchmode2='1' an d ex tcpumod='1'. it also provides alternative functions: i2c bus address 0 (slave mode) wh en switchmode2='1' and ex t c pumod='0' i2c bus master mode enable bit wh en switch mode2='0' 34 gpo2 o general purpose output pin 2 35 gpo1 o general purpose output pin 1 36 gpo0 o general purpose output pin 0 37 monit o r e n0 o monitor select : ('0' : monitor1 select ; ?1? : monitor2 select) 38 d3 i/o dat a3 or ad dress3 whe n switchmode2='1' and ex tcpumod='1'; i2 c slave address1 w hen switchmode2='1' and ex t c pumod='0'; 39 d4 i/o dat a4 or ad dress4 whe n switchmode2='1' and ex tcpumod='1'; i2 c slave address2 w hen switchmode2='1' and ex t c pumod='0'; au922 6 usb kvm control l er v1.01 w 5
pin # pin name i/o descriptio n 40 d5 i/o dat a5 or ad dress5 whe n switchmode2='1' and ex tc pu mo d = '1' 41 d6 i/o dat a6 or ad dress6 whe n switchmode2='1' and ex tc pu mo d = '1' 42 d7 i/o dat a7 or ad dress7 whe n switchmode2='1' and ex tc pu mo d = '1' 43 upus b1_d p i/o up stream port 1 dp 44 upus b1_d m i/o up stream port 1 dm 45 upus b2_d p i/o up stream port 2 dp 46 upus b2_d m i/o up stream port 2 dm 47 up1ledn o system 1 l e d indicator 48 up2ledn o system 2 l e d indicator AU9226 us b kvm controller v1.01w 6
4. system architecture and reference design 4 4 . . 1 1 a a u u 9 9 2 2 2 2 6 6 b b l l o o c c k k d d i i a a g g r r a a m m figure 4.1 AU9226 block dia g ram usb p r ot oc ol en g i n e do w n s t r e a m po r t ho s t 1 us b pr ot oc ol en g i ne do w n str e a m po r t ho s t 2 do w n str e a m por t d a t a m u lt ip l e xo r do w n str e a m por t d a t a ch e c k e r sw i t c h de te c t io n p o rt 1 : u s b k e y b o a rd ; p o rt 2 : usb m o u s e ; p s 2 p o rt : p s 2 k e y b o a rd au922 6 usb kvm control l er v1.01 w 7
5. hot key definition AU9226 support s 2 set s of ?hot key? to help user s to switch pc, rapidly and easily , via hot key sequence defin ed using ke yp ads on the lef t hand side of a keyboard. 5 5 . . 1 1 [ [ s s c c r r o o l l l l ] ] + + + + [ [ s s c c r r o o l l l l ] ] m m o o d d e e hot key definiti on [scroll] ++ [ s croll] + 1 ( note1) switch to pc1 [scroll] ++ [ s croll] + 2 switch to pc2 [scroll] ++ [ s croll] + or switch to next pc [scroll] ++ [ s croll] + or switch to previous pc [scroll] ++ [ s croll] + b beeper on/ o ff (note2) [scroll] ++ [ s croll] + s auto-scan mode every 10 second. ([esc] switch to regular key code) [scroll] ++ [ s croll] + s + n set auto-scan rate (note3) . ([esc) switch to regular key code) [scroll]++[scroll]+f1~f 8 customer d e fine key (note4) . [scroll]++[scroll]+[cap s ] switch to [cap s]++[cap s ] hot key mode [scroll]++[scroll]+[num] switch to [num]++[nu m] hot key mo de [scroll]++[scroll]+[ctrl] switch to [ctrl]+[shif t] hot key mode 5 5 . . 2 2 [ [ c c a a p p s s ] ] + + + + [ [ c c a a p p s s ] ] m m o o d d e e hot key definiti on [cap s]++[cap s ]+1 switch to pc1 [cap s]++[cap s ]+2 switch to pc2 [cap s]++[cap s ]+ or switch to next pc [cap s]++[cap s ]+ or switch to previous pc [cap s]++[cap s ] + b b e e p e r on/ o f f (note2) [cap s]++[cap s ]+s auto-scan mode every 10 seco nd. ([esc] switch to regular key code) [cap s]++[cap s ]+s + n set auto-scan rate (not e3) . ([esc] switch to re gular key code) [cap s]++[cap s ]+f1~f8 customer d e fine key (note4) [cap s]++[cap s ]+[scroll] switch to [scroll]++[scr o ll] hot key mode [cap s]++[cap s ]+[num] switch to [num]++[nu m] hot key mo de [cap s]++[cap s ]+[ctrl] switch to [ctrl]+[shif t] hot key mode AU9226 us b kvm controller v1.01w 8
5 5 . . 3 3 [ [ n n u u m m ] ] + + + + [ [ n n u u m m ] ] m m o o d d e e hot key definiti on [num]++[nu m]+1 switch to pc1 [num]++[nu m]+2 switch to pc2 [num]++[nu m]+ or switch to next pc [num]++[nu m]+ or switch to previous pc [num]++[nu m ] + b b e e p e r on/ o f f (note2) [num]++[nu m]+s auto-scan mode every 10 seco nd. ([esc] switch to regular key code) [num]++[nu m]+s + n set auto-scan rate (not e3) . ([esc] switch to re gular key code) [num]++[nu m]+f1~f8 customer d e fine key (note4) [num]++[nu m]+[scroll] switch to [scroll]++[scr o ll] hot key mode [num]++[nu m]+[cap s ] switch to [cap s]++[cap s ] hot key mode [num]++[nu m]+[ctrl] switch to [ctrl]+[shif t] hot key mode 5 5 . . 4 4 [ [ c c t t r r l l ] ] + + [ [ s s h h i i f f t t ] ] m m o o d d e e ( ( l l e e f f t t - - h h a a n n d d s s i i d d e e ) ) hot key definiti on [ctrl]++[ctrl] switch to next live pc [ctrl + shif t + 1] switch to pc1 [ctrl + shif t + 2] switch to pc2 [ctrl + shif t + or ] switch to next pc [ctrl + shif t + or ] switch to previous pc [ctrl + shif t + b] beeper on/ o ff (note2) [ctrl + shif t + s] auto-scan mode every 10 seco nd. ([esc] switch to regular key code) [ctrl + shif t + s + n] set auto-scan rate (not e3) . ([esc] switch to re gular key code) [ctrl + shif t + f1~f8] customer d e fine key (note4) [ctrl + shif t + scroll] switch to [scroll]++[scr o ll] hot key mode [ctrl + shif t + cap s ] switch to [cap s]++[cap s ] hot key mode [ctrl + shif t + num] switch to [num]++[nu m] hot key mo de note 1: ?++? means press key rapidly , ?[scroll]++[ scroll]+1? means press ? s croll? twice rapidly and then pr ess ?1?. if sy stem receives ?scroll + + scroll? co mmand onl y , system will reset the buf f e r when it does not rece ive any input comes af ter within a defined inter v al of time (say , 5 seconds). note 2: audible feedback when beeper is on and keep the device in silent mode when beeper is off . note 3: n = number from 1 to 9, each represent s 5 second s? interval late ncy to 60 seconds cor r espondingly . au922 6 usb kvm control l er v1.01 w 9
auto-scan r a te set n nu mb er second 1 5 2 1 0 3 1 5 4 2 0 5 2 5 6 3 0 7 3 5 8 4 0 9 6 0 note 4: gpo 2 gpo 1 gpo 0 function ke y +f1 0 0 0 function ke y +f2 0 0 1 function ke y +f3 0 1 0 function ke y +f4 0 1 1 function ke y +f5 1 0 0 function ke y +f6 1 0 1 function ke y +f7 1 1 0 function ke y +f8 1 1 1 AU9226 us b kvm controller v1.01w 10
6. electrical characteristics 6 6 . . 1 1 reco mmended oper at ing conditions table 6.1 recommended operating conditions symbol parameter min typ max units v cc power supp ly 4.75 5 5.25 v v in input v o lt age 0 vcc v t orp operating t e mperature 0 85 oc t stg s t orage t e mperature -40 125 oc 6 6 . . 2 2 g g e e n n e e r r a a l l d d c c c c h h a a r r a a c c t t e e r r i i s s t t i i c c s s table 6.2 general d c characteristics symbol parameter conditi o ns min typ max units i il input low cu rrent no pull-up or p ull-down -1 1 a i ih input high current no pull-up or p ull-down -1 1 a o z t r i-st ate lea k age current -10 10 a c in input cap a cit ance 5 f c out output cap a cit ance 5 f c bid bi-directiona l buf fer ca p acit ance 5 f 6 6 . . 3 3 d d c c e e l l e e c c t t r r i i c c a a l l c c h h a a r r a a c c t t e e r r i i s s t t i i c c s s o o f f 3 3 . . 3 3 v v i i / / o o c c e e l l l l s s table 6.3 dc electrical charac teristics of 3.3v i/o cells limits symbol parameter conditi o ns min typ max unit v il input low v o lt age cmos 0.9 v v ih input hight v o lt age cmos 2.3 v v ol output low volt age iol=4ma, 1 6 ma 0.4 v v oh output high volt age i o h = 4m a , 16 m a 2.4 v r i input pull-u p /down resist ance v il=0v or vi h = v c c 10k/20 0k k ? au922 6 usb kvm control l er v1.01 w 11
6 6 . . 4 4 c c r r y y s s t t a a l l o o s s c c i i l l l l a a t t o o r r c c i i r r c c u u i i t t s s e e t t u u p p f f o o r r c c h h a a r r a a c c t t e e r r i i z z a a t t i i o o n n the followin g setup was used to measure the op en loop volt age gain for cryst a l oscillator cir c uit s . the feedback re sistor serve s to bias the circuit a t it s quiescent operating po int and the a c coupling cap a citor , cs, is much lar ger than c1 and c2. figure 6.1 crystal oscillator ci rcuit setup for characterization 6 6 . . 5 5 e e s s d d t t e e s s t t r r e e s s u u l l t t s s t est descri p tion: esd t e sting was performed on a zapmaster system using the human-bod y ?model (hbm) and ma chine-model (mm), acco rding to mil_std 883 and eiaj ic_121 respectively . human-bod y -model stre ss devices b y sudden application o f a high volt age supplied by a 100 pf cap a citor throu gh 1.5 kohm resist ance. machine-mo del stresses devices by sudden application of a high volt age supplied by a 200 pf cap a citor throu gh very low (0 ohm) resist ance t est circuit & condition zap interval : 1 second number of z a p s : 3 posit ive and 3 negative at room temperat ure critera : i-v curve t r acing table 6.4 esd data model model s/s target results hbm vdd, vss, i/ c 15 2000v tbd mm vdd, vss, i/ c 15 200v tbd AU9226 us b kvm controller v1.01w 12
6 6 . . 6 6 l l a a t t c c h h - - u u p p t t e e s s t t r r e e s s u u l l t t s s t est descri p tion: latch -up testing was performed at room ambient using an imcs-4600 system which applies a stepped vo lt age to one p i n per device with all other pins o pen except vdd and vss which were biased to 5 v o lt s and ground respectively . t e sting was st arted at 5.0 v (positive) or 0 v(negative), and the dut wa s biased for 0.5 seconds. if neither the put current supply nor the device current supply reached the predefine d limit (dut=0 ma , icc=100 ma), the n the volt age was incre a sed by 0.1 v o lt s and th e pin was test ed again. this proced ure was recommended by the jedec jc-40.2 cmos logic st andardizat i on committee. notes: 1. dut : device under t e st. 2. put : pin under t e st. icc measure m ent pi n under test + vcc dut gnd m untested output ope n ci rcui t untested input tied to v supply t r igger source v supply pi n under test 1 source + t est circuit : positive input/ output overvolt a ge /overcurrent au922 6 usb kvm control l er v1.01 w 13
vc c dut gnd pi n un der te s t ma un t e s t e d ou t p u t o p e n ci r c u i t un t e s t e d in p u t t i e d to v su p p ly tr i g g e r sou r ce v s u p p l y + + i c c m eas u r em en t 1 s o ur ce t est circuit: negative input /outpu t overvolt a ge/overcurrent vcc dut gnd ma unt e st e d out put ope n cir c uit all input tied to v supply v supply + icc m e as ureme n t suppl y volt age t est figure 6.2 latch-up test circuits model model voltage (v)/ current (ma) s/s results + v o lt age - 11 . 0 11 . 0 5 t b d + current - 200 200 5 t b d v d d - v x x 9 . 0 5 t b d table 6.5 latch?up data AU9226 us b kvm controller v1.01w 14
7. mechanical information figure 7.1 mechanical information diagram b e c1 a2 a l1 l 0. 2 5 gauge pl ane sea ti ng p la ne a1 e1 e d d1 s y mb ol s min. max . a -- 1.6 a1 0.05 0 . 1 5 a2 1.35 1 . 4 5 c1 0.09 0 . 1 6 d 9. 00 b s c d 1 7. 00 b s c e 9. 00 b s c e 1 7. 00 b s c e 0. 5 bsc b 0.17 0 . 2 7 l 0.45 0 . 7 5 l1 1 re f 1. jedec out l in e: m s -02 6 bbc 2 . di mens io ns d 1 an d e 1 d o no t in c l u d e m o ld p r o t ru s i on . a l l o w a bl e pr o t ru sio n is 0 . 2 5 mm per s i de . d 1 a n d e1 a r e ma xi mu m p l a s t i c bo d y s i z e d i m e ns io ns im clud ing m o ld mism a t c h . 3 . di mens io n b d o e s n o t i n cl ud e da m b a r pro t rusi on. al l o w a ble d a mbar pro t r u s i o n sh al l no t cause t h e l e ad wid t h t o ex c e ed t h e ma x i mu m b d i m e ns i o n b y m o r e th a n 0. 0 8 mm au922 6 usb kvm control l er v1.01 w 15
7. abbreviations in this chap ter some of the terms and abbreviations used throughout the technical reference manual are listed as follow s . sie serial interf ace engine utmi usb t r ansceiv er m a crocell interfa c e about alcor micro, corp. alcor micro, corp. designs, develo p s and market s highly integrated a nd advanced peripheral semiconduct o r , and sof t ware driver solution s f o r the personal computer and consu m er electronics market s worldwide. w e spe c ia lize in usb solution s a nd focus on emerging technology such as usb and ieee 1394. the comp an y of fers a range of semiconductors including controllers fo r usb hub, integrated keyboard/usb hub and usb flash memory card reader?etc. alcor micro, corp. is ba sed in t a ipe i , t a iwan, wit h sales of fices in t a ip ei, jap an, korea and california. alcor micro is distinguishe d by it s ability to provide i nnovative solution s f o r spec-driv en product s . innovations like sing le chip solutions for traditional multiple chip p r oduct s and on-board vo lt age regulators enable the comp an y to provide cost-ef f icien c y solutions for the computer periphe ral device oem custome r s worldwide. AU9226 us b kvm controller v1.01w 16

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