h ypertransport tunne l -to-dual pci-x bridge . features 16 - b i t hy pe rtr a ns po rt i n t e r f a ce (si d e a) of fers a m a xim u m band wi dt h of 6 . 4 g b / s 8 - b it hy p e rtran s port in terface (si d e b) of fers a m a xim u m band wi dt h of 3 . 2 g b / s connects to the host a n d a downst ream hy pe rtra ns po r t t echn o l o gy -c om pl i a nt devi ce su pp ort s d o ubl e h o st ed chai ns (c p u on each port) each sid e supp or ts h y p e r t r a n s por t t echn o l o gy - d ef i n ed re duce d b i t wi dt hs ? 8- bi t , 4- bi t , a n d 2- bi t each si de s u pports t r ans f er rat e s of 1600, 1 200 , 80 0, an d 40 0 m e g a - t r a nsf e r s p e r second offers ind e p e nd en t t r an sfer rate an d b it wid t h selectio n li nk di sc on nec t pr ot oc ol s u p p o rt e d tw o pc i - x bri dge s (b ri d g e a an d b r i dge b) each s u pport the following: o a 6 4 -b it d a ta bu s o pci-x m odes and legacy pc i revi si o n 2. 2 m ode s o 1 33- , 10 0- an d 6 6 m h z tr an sf er r a tes i n pc i - x m ode o 66 - a n d 33 -m hz pc i 2. 2 m odes o ind e p e nd en t tran sfer rates and ope rat i o nal m odes o up to five pci m a sters o a n i / o adv a nce prog r a mm a b le i n terru p t co n t ro ller (io api c ) w ith fo ur re di rect i o n regi st ers ? l e gacy in terru p t con t ro ller an d ioapic m odes su pp o r t e d o h o t plug co n t ro ller an d suppo r t 829-ball obga packa g e the most scalable, highest performance hy p e rtransport interconnect bridge ever inc r easing cpu bus clock spee ds, c o uple d with faster peripheral devi ces , have e nge n d ere d i/ o b o ttlen e ck s i n h i gh -sp e ed , n e t w orked appl i cat i o ns s u ch as swi t c he s, r out er s and storage servers . t h e hy pe rtra ns po r t t echn o l o gy i s a fast , n on- pr opr ietar y , po in t- t o -p o i n t lin k that o ffe rs the spee d necessar y fo r these a dva nce d syste m s. plx tech n o l o gy ha s devel o p e d t h e p o we r d ri ve ? ht7 5 2 0 , a hy pe rtra ns po rt tunnel-t o -dua l pci-x bri dge that interf aces hype rtra ns port-base d devices to pc i- base d peri phe ral s . the h t 7 5 2 0 of fer s fl exi b l e c o n n ect i v i t y and hi gh per f o r m a nce, e n abl i n g t o d a y ? s hi gh -sp eed e m bedded sy st em s. scalability powerdri v e d e v i ces p r o v i d e max i m u m scal ab ility th rou gh an on bo ard b i - d i rection a l hy p e rtran s port tu nn el in terface . t h e tunnel enables daisy cha i ning of up t o 3 1 ot he r hy pe rtra ns po r t devi ces o n a s i ngl e bu s. t h e po wer d ri ve de vi ce cou p l e s a hy p e rtra ns po rt t u nnel wi t h t w o pc i- x bri dge s. the pc i - x b r i dge pr o v i d es a co n n ect i o n bet w ee n hy pe rtra ns p o rt base d pr oce ssor s a n d pc i base d p e ri p h e rals. tog e th er, t h e two pci-x bridg e s en ab le su ppo rt fo r con n ectiv it y o f up to 1 0 pci m a sters. as a res u lt , p o we rd ri ve e n abl e s hi ghe r c a paci t y sy st em s vi a con n ect i o ns t o m u lt i p l e pc i- x devi ces an d hy pe rtra ns po r t peri phe ral s . high performance po wer d ri ve de vi ces si g n i f i c a n t l y i n crease p e rf orm a nce o v e r pc i- onl y ba sed sy st em s. the hy pe rtra ns po r t tu nnel has a 16 - b i t i n t e rface (si d e a) a n d a n 8- bi t interface (si d e b). p o wer d ri v e also of fe r s a ful l , 8 00m hz ddr cl oc k rat e . as a resul t , si de a of t h e t u n n el pr ovi des a m a xim u m bandwi d t h of 6 . 4 gb / s , a 4 8 x spee d up o v er st anda rd pc i . si de b pr o v i d e s a m a xim u m of 3. 2 gb / s , gi v i ng a 24x s p ee d up. these high-spe e d inte rf aces provide fast peri phe ral accesses t o / f r o m me mo r y . perform a n ce is also m a x i m i ze d thro ugh th e pci-x bridg e s. each 64 -b it wi d e bri dge i s capa b l e of a m a xim u m speed o f 13 3 m h z. i n pc i- x m ode, 1 3 3 - , 10 0 - an d 66 mhz tr an sf er r a tes ar e su ppo r t ed . in pci m o d e , each b r i d g e supp or t s 66 - an d 33 mhz tr an sf er r a tes. for op ti m u m p e rfo r m an ce n e t w or k s , pow e rd r i ve do es not re qui re t h e hi g h est s p eed devi ce t o be sl owe d d o w n t o t h e per f o r m a nce of t h e sl owest pe ripheral. instea d, t h e po wer d ri ve de vi ce al l o w s hi g h -s pee d l o a d s t o ope rat e on a se parat e bri d g e , enabl i n g hi gh - s pee d traffic t o run full tilt. a h i gh ban d w i d t h tunnel an d m u l tip le h i gh -sp eed bridg e s are th e en ab lers for high-performance em bedd ed a ppl i cat i o ns . version 1.3 2002 powerdrive HT7520
features interface s du al pci-x hypert ransport th e pow e rdr i v e h t 7 520 is a h i gh- spee d devi ce t h at p r ovi des t w o i nde pen d e n t , h i gh -pe r f o rm ance pci-x b r i d g e s, in tegrated with a hi g h -s pee d hy pert ra nsp o r t technology tunnel. t h e t u nnel fu nct i o n pr ovi des c o nnect i o n cap ab ility to o t h e r down s t r eam hy pe rtra ns po r t t echn o l o gy devices , allowing greater syste m con n ect i v i t y . as s h ow n i n fi gu re 1, t h e f r o n t - e n d hy pe rtra ns po r t interface (si d e a) provide s a co nfigu r ab le 16 -b it wi d e com m uni cat i on pat h t o t h e h o st , of feri ng u p t o 6. 4gb / s o f b a ndwid th. si milarly, th e b a ck -end hy pe rtra ns po r t interface (si d e b) p r ov id es a configu r ab le 8-b it wid e com m uni cat i on pat h t o a do w n st ream devi ce, of feri ng u p t o 3. 2gb / s o f ban d wi dt h. o pc i- x versi o n 1. 0a c o m p l i a nt o hy pe rtra ns po r t tu nnel i s co m p lian t to the hyp e rtran s po rt i/ o li nk s p eci fi cat i on, ve rsi o n 1. 03 o 64 - b i t wi de dat a b u s o ope r at i o nal m ode s of pc i - x and l e gacy pci l o cal bus specification, revision 2.2 pr ot oc ol o si de a of t h e hy pe rtra ns po r t tunnel is a 16-bit interface; side b is 8-b it o su pp ort f o r 1 3 3 - , 10 0- an d 6 6 m hz trans f er rates i n pc i-x m ode o sup p o r t fo r 66- an d 33 mh z tr an sf er r a tes i n pc i m ode o either si de of the tunnel ca n be connected to a host or a not her do w n st ream ht de vi ce o in de pen d e n t t r ansfe r rat e s a n d ope rat i o nal m odes fo r eac h b r i d ge o su pp ort s d o ubl e h o st ed chai ns (cpu o n eac h po rt) o sup p o r t fo r up to 5 pci master s, p e r b r i d g e , w ith cl o c k, r e qu est, an d gr an t si gnal s o each si de of the tunnel has i nde pen d e n t l y pr o g ram m abl e 8- bi t , 4- bi t an d 2 - bi t wi dt hs o i o a p i c w ith up to 12 pr og r a mmab l e i n t e rr upt s; leg acy int e r r upt c ont rol l e r an d io api c m o d e s su ppo r t ed o each si de s u pp ort s i nde pen d e n t l y pr o g ram m abl e tr an sf er r a tes of 8 0 0 , 600 , 40 0 an d 200 m h z o sh pc - c o m p lian t , v e r s i o n 1.1, ho t plug cont roller an d sup p o rt o each hyp e rtran s port lin k im pl em ent s tx a n d r x uni di rect i o nal , 1. 2v lv ds si gnal i n g electrical/me c hanical fe a t ures o 82 9 - pi n or gani c b g a ( o b g a) o 3 7 .5 x 37 .5 m m o lo w po wer 1 . 8 v c o re o li nk di sc on nec t pr ot oc ol su ppo r t ed o 3. 3v pc i - x si gnal i n g; 1. 2v l i nk si gnal i n g o co mmercial te m p eratu r e range si de a tunnel si de b pci-x br i d ge a pci-x br i d ge b host do w n st r e a m dev i ce h y per t r anspor t li nk 8-bi t ups t r eam l i n k 8-bi t dow ns t r eam l i n k hy per trans por t li nk 16- bi t ups t r eam l i n k 16- bi t dow ns t r eam l i n k plx h t 7520 h y pert ran s por t pci-x tunn el pci per i pher al (1) pc i- x per i pheral pci per i pher al (n) figure 1. plx HT7520 h y pertranspo rt? pci-x tunnel
applica t ions switches & r o uters the d u al pc i - x bri dge p r o v i d es m a xim u m scalab ility wh ile m a in tain in g in tero p e rab ility wi t h l e gacy pc i c o m pone nt s. the po wer d ri ve ht 7520 is a hi gh-perform ance sol u tion enabling faster, sim p ler and s calable feature s fo r next -ge n era t i on s w i t c hes a n d r o ut ers. fi gu re 2 s h ows t h e p o wer d ri v e ht7 520 im p l e m en ted in a lan-to- wa n bri d ge/ r out e r . a p o i n t - t o - poi nt , hig h -s pee d inte rco n n ect sim p lifies the system architecture a n d dram atically increases t h e ove rall per f o r m a nce. to day ? s ro ut er s an d s w i t c hes process hi gh-s peed traffic tha t are b o ttlen e ck ed acro ss th e i/o bu s. swi t c h a n d ro u t er m a nufact u r ers are see k i n g out ne w i/ o in terconn ect solu tio n s th at add r ess their e v er -inc re asing nee d fo r sp eed , robu stness and scalab i lity. me mor y cpu h t in te r f ac e hyp e rt ran s p o rt lin k p c i d e v i ce 0 pow e rdriv e p c i d e v i ce 1 du a l ge pow e rd riv e p c i d e v i ce 2 dual g e pci pl3 oc48 fra m er h y pe r t r a ns po r t li nk pc i p c i pc i pc i figure 2. blo c k diagram of a lan-to-wan bridge/router
vpn gatew a y s som e of t h e bi gge st chal l e n g e s faci n g har d wa r e desi gne rs of vp n equi pm ent i n cl ude de si g n i n g efficient e n cry p tion/ decry p tion technologies. these tec h nol o gies m u st provide i n crease d security and pri v acy, as wel l as sende r /target au th en ticatio n , id en tification an d track ing . curren t so lu tion s in crease security and privacy, but require th e trad e plx technolog y , i n c. 870 maude a v e. sunn yvale, ca 94085 usa tel: 1-800- 75 9-373 5 tel: 1-408- 77 4-906 0 fax: 1-40 8-7 74-21 69 e m ail: info@plxtech.com w e b s i t e : w w w . p l x t e c h . c o m of f of l a rge am ou nt s of dat a ove r h ead . at l o w ba n d wi dt h spee ds, t r ansm i t t i ng t h e pay l oa d pl us au th en ticatio n ad d ition s sl o w s do wn d a ta tran sm issi o n ti m e s to a sn ail's pace. as shown in figure 3, t h e powerdri ve HT7520 c o nnect s the cpu to a sec u rity proces sor over a 6. 4m b / s p o i n t - t o - poi nt i n t e rc on nect bus . vp n a ppl i cat i ons be nefi t i mmed i ately th r oug h d e cr eased transm ission times of secure, encry p ted data. p c i dev i ce 0 pow e rd riv e sec u r i t y p r o c e sso r p c i dev i ce 1 memor y memo r y g i gabit ethernet cpu h t inter f a c e h y p e r t r a ns po r t li n k pci h y p e r t r a ns po r t li nk pc i figure 3. blo c k diagram of vpn gateway b y addi ng t h e po wer d ri ve de vi ce, t h e r e i s a 48 x ba nd wi dt h i n c r ease o v er a st an dar d 3 3 mhz pci c o nnection. high-s p eed net w ork co nn ectiv ity is also en h a n c ed v i a th e av ailab ility o f t w o 133 mhz pci-x bridg e s. the po wer d ri ve ht 75 2 0 i s a hi g h - spee d, scalable hy pertransport sol u tion t h at allev i ates vpn in terco n n ect bo ttlen eck s and p r ov id es exp a nd ab ility for t o m o rro w's fun c tion a lity. product ordering information part numb er description h t 7 520 - b a 13bc plx po we rd rive ht 75 2 0 hy pert ra nsp o r t tu nnel - t o - d ua l pc i- x b r i d ge p l eas e v i sit t h e p l x w e b si te at htt p ://w ww .pl x tech. c om or c o n t ac t p l x sal e s at 40 8- 77 4-9 0 6 0 f o r sam p li ng. ? 2002 pl x t e chnology , i n c. all r i ghts r e ser v ed. plx and the plx l ogo ar e register ed tradem ar ks of pl x technology , i n c. po wer d r ive and the power d r i ve logo ar e tr adem ar ks of pl x t echnology , i n c., which m a y be r e gister ed in so m e jur i sdiction. all other pr oduct nam e s that appear in this m at erial a r e for identification purposes only and ar e acknowledged to be tr adem arks or r e gister ed tr adem ar ks of their respective co m p anies. i n form ation supplied by pl x is be lieved to be accura te and reliable, but plx technology , inc. assu m e s no re sponsi b ility for any e rrors that m a y a ppear in this m a t e rial. p l x technology , inc . res e rves t h e r i ght, without notice, to m a ke chang e s in p r oduct design or s p ecification. HT7520-sil-pb-p1-1.3 12/02 750
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