CAT24C21. 1 kb Dual Mode Serial EEPROM for VESA Plug-and-Play

Transcription

1 k ual Mod rial ROM for V lug-and-lay sription h 2421 is a 1 k rial MO ROM intrnally organizd as 128 words of 8 its ah. h dvi omplis with th Vido ltronis tandard ssoiation s (V ), isplay ata hannl ( ) standards for lug and lay monitors. h transmit only mod (1 ) is ontrolld y th VL lok input and th i dirtional mod (2 ) is ontrolld y th L lok input, with oth mods sharing a ommon input/output (I/O). h transmit only mod is a rad only mod, whil th i dirtional mod is a rad and writ mod following th I 2 protool. In writ mod th 2421 faturs a 16 yt pag writ uffr. h dvi is availal in 8 lad I, OI, O, MO and FN pakags. Faturs 1 /2 Intrfa ompliant for Monitor Idntifiation 400 khz I 2 Bus ompatil 2.5 to 5.5 Volt Opration 16 yt ag Writ Buffr Hardwar Writ rott Low owr MO hnology 1,000,000 rogram/ras yls 100 Yar ata Rtntion Industrial mpratur Rang 8 lad I, OI, O, MO or FN akags his vi is Fr, Halogn Fr/BFR Fr, and RoH ompliant OI 8 W UFFIX 751B I 8 L UFFIX 646 IN ONFIGURION N 1 N N V FN 8 Z4 UFFIX 511L O 8 Y UFFIX 948L MO 8 Z UFFIX 846 V VL L I (L), OI (W), O (Y), FN (Z4), MO (Z) IN FUNION V in Nam N No onnt Funtion L L rial ata / ddrss rial lok (i dirtional mod) 2421 VL V rial lok (transmit only mod) owr upply VL V Ground V Figur 1. Funtional ymol ORRING INFORMION dtaild ordring and shipping information in th pakag dimnsions stion on pag 14 of this data sht. miondutor omponnts Industris, LL, 2009 ptmr, 2009 Rv uliation Ordr Numr: 2421/

2 2421 al 1. BOLU MXIMUM RING aramtrs Ratings Units mpratur Undr Bias 55 to +125 torag mpratur 65 to +150 Voltag on ny in with Rspt to Ground (Not 1) 2.0 to +V +2.0 V V with Rspt to Ground 2.0 to +7.0 V akag owr issipation apaility ( = 25 ) 1.0 W Lad oldring mpratur (10 ss) 300 Output hort iruit urrnt (Not 2) 100 m trsss xding Maximum Ratings may damag th dvi. Maximum Ratings ar strss ratings only. Funtional opration aov th Rommndd Oprating onditions is not implid. xtndd xposur to strsss aov th Rommndd Oprating onditions may afft dvi rliaility. 1. h minimum input voltag is 0.5 V. uring transitions, inputs may undrshoot to 2.0 V for priods of lss than 20 ns. Maximum voltag on output pins is V V, whih may ovrshoot to V V for priods of lss than 20 ns. 2. Output shortd for no mor than on sond. al 2. RLIBILIY HRRII ymol aramtr Rfrn st Mthod Min Units N N (Nots 3 and 4) nduran MIL 883, st Mthod ,000,000 rogram/ras yls R (Not 3) ata Rtntion MIL 883, st Mthod Yars V Z (Not 3) usptiility MIL 883, st Mthod Volts I LH (Nots 3 and 5) Lath up J tandard m 3. his paramtr is tstd initially and aftr a dsign or pross hang that affts th paramtr. 4. ag Mod, V = 5 V, Lath up prottion is providd for strsss up to 100 m on addrss and data pins from 1 V to V +1 V. al 3... ORING HRRII (V = 2.5 V to 5.5 V, unlss othrwis spifid. Industrial tmpratur rang.) ymol aramtr st onditions Min Max Units I owr upply urrnt f L = 400 khz 2 m I B (Not 6) tandy urrnt V IN = GN or V 1 I LI Input Lakag urrnt V IN = GN to V 10 I LO Output Lakag urrnt V OU = GN to V 10 V IL Input Low Voltag 1 V x 0.3 V V IH Input High Voltag V x 0.7 V V V OL1 Output Low Voltag V = 3.0 V, I OL = 3 m 0.4 V V IL Input Low Voltag (VL) V 2.7 V 0.8 V V IH Input High Voltag (VL) 2.0 V 6. Maximum standy urrnt (I B ) = 10 for th xtndd utomotiv tmpratur rang. al 4. IN ( = 25, f = 1.0 MHz, V = 5 V) ymol aramtr onditions Min Max Units I/O (Not 7) Input/Output apaitan () V I/O = 0 V 8 pf IN (Not 7) Input apaitan (VL, L) V IN = 0 V 6 pf 7. his paramtr is tstd initially and aftr a dsign or pross hang that affts th paramtr. 2

3 2421 al 5... HRRII (V = 2.5 V to 5.5 V, unlss othrwis spifid. Industrial tmpratur rang.) ymol aramtr Min Max Units RNMI ONLY MO V Output valid from VL 0.5 s VHIGH VL high 0.6 s VLOW VL low 1.3 s VHZ Mod transition 0.5 s VU ransmit only powr up 0 ns R & WRI YL LIMI F L lok Frquny 400 khz I (Not 8) Nois upprssion im onstant at L, Inputs 100 ns t L Low to ata Out and Out 1 s t BUF (Not 8) im th Bus Must Fr Bfor a Nw ransmission an tart 1.2 s t H: tart ondition Hold im 0.6 s t LOW lok Low riod 1.2 s t HIGH lok High riod 0.6 s t U: tart ondition tup im 0.6 s t H: ata In Hold im 0 ns t U: ata In tup im 50 ns t R (Not 8) and L Ris im 0.3 s t F (Not 8) and L Fall im 300 ns t U:O top ondition tup im 0.6 s t H ata Out Hold im 100 ns OWR U IMING (Not 8 and 9) t UR owr up to Rad Opration 1 ms t UW owr up to Writ Opration 1 ms WRI YL LIMI t WR Writ yl im 5 ms 8. his paramtr is tstd initially and aftr a dsign or pross hang that affts th paramtr. 9. t UR and t UW ar th dlays rquird from th tim V is stal until th spifid opration an initiatd. h writ yl tim is th tim from a valid stop ondition of a writ squn to th nd of th intrnal program/ras yl. uring th writ yl, th us intrfa iruits ar disald, is allowd to rmain high, and th dvi dos not rspond to its slav addrss. in sription h L srial lok input pin is usd to lok all data transfrs into or out of th dvi whn in th i dirtional mod. h i dirtional srial data/addrss pin is usd to transfr data into and out of th dvi. h pin is an opn drain output and an wir ORd with othr opn drain or opn olltor outputs. Funtional sription h 2421 has two mods of opration: th transmit only mod and th i dirtional mod. hr is a sparat 2 wir protool to support ah mod, ah having a sparat lok input (VL and L rsptivly) and oth mods sharing a ommon i dirtional data lin (). h 2421 ntrs th transmit only mod upon powr up and gins outputting data on th pin with ah lok signal on th VL pin. h dvi will rmain in th transmit only mod until thr is a valid HIGH to LOW transition on th L pin, whn it will swith to th i dirtional mod (Figur 2). On in th i dirtional mod, th only way to rturn to th transmit only mod is y powring down th dvi. h VL srial lok input pin is usd to lok data out of th dvi whn in transmit only mod. Whn hld low, in i dirtional mod, it will inhiit writ oprations. 3

4 2421 ransmit Only Mod: (1) Upon powr up, th 2421 will output valid data only aftr it has n initializd. uring initialization, data will not availal until aftr th first nin loks ar snt to th dvi (Figur 3). h starting addrss for th transmit only mod an dtrmind during initialization. If th pin is high during th first ight loks, th starting addrss will 7FH. If th pin is low during th first ight loks, th starting addrss will 00H. uring th ninth lok, will in th high impdan stat. ata is transmittd in 8 it words with th most signifiant it first, followd y a 9th don t ar it whih will in th high impdan stat (Figur 4). h 2421 will ontinuously squn through th ntir mmory array as long as VL is prsnt and no falling dgs on L ar dttd. Whn th maximum addrss (7FH) is rahd, addrssing will wrap around to th zro loation (00H) and transmitting will ontinu. h i dirtional mod lok (L) pin must hld high for th dvi to rmain in th transmit only mod. ransmit Only Mod Bi irtional Mod L VHZ VL Figur 2. Mod ransition L at high impdan for 9 lok yls Bit8 Bit7 Bit6 Bit5 Bit4 VL VU V Figur 3. vi Initialization for ransmit only Mod L must rmain high for transmit only mod L Bit8 (MB) Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 on t Bit8 Bit7 (LB) ar VL VHIGH VLOW Figur 4. ransmit Only Mod 4

5 2421 Bi irtional Mod (2) h following dfins th faturs of th I 2 us protool in i dirtional mod (Figur 5): 1. ata transfr may initiatd only whn th us is not usy. 2. uring a data transfr, th data lin must rmain stal whnvr th lok lin is high. ny hangs in th data lin whil th lok lin is high will intrprtd as a R or O ondition. Whn in th i dirtional mod, all inputs to th VL pin ar ignord, xpt whn a logi high is rquird to nal writ apaility. R ondition h R ondition (Figur 7) prds all ommands to th dvi, and is dfind as a HIGH to LOW transition of whn L is HIGH. h 2421 monitors th and L lins and will not rspond until this ondition is mt. O ondition LOW to HIGH transition of whn L is HIGH dtrmins th O ondition. ll oprations must nd with a O ondition. vi ddrssing h us Mastr gins a transmission y snding a R ondition. h Mastr thn snds th addrss of th partiular slav dvi it is rqusting. h four most signifiant its of th 8 it slav addrss ar fixd as 1010 for th 2421 (s Figur 9). h nxt thr signifiant its ar don t ar. h last it of th slav addrss spifis whthr a Rad or Writ opration is to prformd. Whn this it is st to 1, a Rad opration is sltd, and whn st to 0, a Writ opration is sltd. ftr th Mastr snds a R ondition and th slav addrss yt, th 2421 monitors th us and rsponds with an aknowldg (on th lin) whn its addrss maths th transmittd slav addrss. h 2421 thn prforms a Rad or Writ opration dpnding on th stat of th R/W it. knowldg ftr a sussful data transfr, ah riving dvi is rquird to gnrat an aknowldg (). h aknowldging dvi pulls down th lin during th ninth lok yl, signaling that it has rivd th 8 its of data (Figur 8). h 2421 rsponds with an aftr riving a R ondition and its slav addrss. If th dvi has n sltd along with a writ opration, it rsponds with an aftr riving ah 8 it yt. Whn th 2421 is in a R mod it transmits 8 its of data, rlass th lin, and monitors th lin for an. On it rivs this, th 2421 will ontinu to transmit data. If no is snt y th Mastr, th dvi trminats data transmission and waits for a O ondition. Writ Oprations VL must hld high in ordr to program th dvi. his applis to yt writ and pag writ opration. On th dvi is in its slf timd program yl, VL an go low and not afft programming. Byt Writ In th Byt Writ mod (Figur 10), th Mastr dvi snds th R ondition and th slav addrss information (with th R/W it st to zro) to th lav dvi. ftr th lav gnrats an, th Mastr snds th yt addrss that is to writtn into th addrss pointr of th ftr riving anothr from th lav, th Mastr dvi transmits th data yt to writtn into th addrssd mmory loation. h 2421 aknowldgs on mor and th Mastr gnrats th O ondition, at whih tim th dvi gins its intrnal programming yl to nonvolatil mmory (Figur 6). Whil this intrnal yl is in progrss, th dvi will not rspond to any rqust from th Mastr dvi. t F t HIGH t R t LOW t LOW L t U: t H: t H: t U: t U:O IN t t H t BUF OU Figur 5. Bus iming 5

6 2421 L 8th Bit Byt n t WR O ONIION R ONIION R Figur 6. Writ yl iming ag Writ h 2421 writs up to 16 yts of data in a singl writ yl, using th ag Writ opration. h ag Writ opration (Figur 11) is initiatd in th sam mannr as th Byt Writ opration, howvr instad of trminating aftr th initial word is transmittd, th Mastr is allowd to snd up to fiftn additional yts. ftr ah yt has n transmittd th 2421 will rspond with an, and intrnally inrmnt th low ordr addrss its y on. h high ordr its rmain unhangd. If th Mastr transmits mor than sixtn yts prior to snding th O ondition, th addrss ountr wraps around, and prviously transmittd data will ovrwrittn. On all sixtn yts ar rivd and th O ondition has n snt y th Mastr, th intrnal programming yl gins. t this point all rivd data is writtn to th 2421 in a singl writ yl. knowldg olling h disaling of th inputs an usd to tak advantag of th typial writ yl tim. On th stop ondition is issud to indiat th nd of th host s writ opration, th 2421 initiats th intrnal writ yl. polling an initiatd immdiatly. his involvs issuing th start ondition followd y th slav addrss for a writ opration. If th 2421 is still usy with th writ opration, no will rturnd. If th 2421 has ompltd th writ opration, an will rturnd and th host an thn prod with th nxt rad or writ opration. L R Bit Figur 7. tart/top iming O Bit L FROM MR OUU FROM RNMIR OUU FROM RIVR R Figur 8. knowldg iming NOWLG X X X R/W Figur 9. lav ddrss Bits 6

7 2421 Writ rottion Whn th VL pin is onntd to GN and th 2421 is in th i dirtional mod, th ntir mmory is prottd and oms rad only. Rad Oprations h R opration for th 2421 is initiatd in th sam mannr as th writ opration with th on xption that th R/W it is st to a on. hr diffrnt R oprations ar possil: Immdiat ddrss R, ltiv R and quntial R. Immdiat ddrss Rad h 2421 s addrss ountr ontains th addrss of th last yt assd, inrmntd y on. In othr words, if th last R or WRI ass was to addrss N, th R immdiatly following would ass data from addrss N + 1 (Figur 12). If N = 127, thn th ountr will wrap around to addrss 0 and ontinu to lok out data. ltiv Rad ltiv R oprations allow th Mastr dvi to slt at random any mmory loation for a R opration (Figur 13). h Mastr dvi first prforms a dummy writ opration y snding th R ondition, slav addrss and yt addrss of th loation it wishs to rad. ftr th 2421 aknowldgs th word addrss, th Mastr dvi rsnds th R ondition and th slav addrss, this tim with th R/W it st to on. h 2421 thn rsponds with its and snds th 8 it yt rqustd. h mastr dvi dos not snd an ut will gnrat a O ondition. quntial Rad h quntial R opration (Figur 14) an initiatd y ithr th Immdiat ddrss R or th ltiv R opration. ftr th 2421 snds th first 8 it yt, th Mastr rsponds with an, whih tlls th lav that mor data is ing rqustd. h 2421 will ontinu to output an 8 it yt for ah snt y th Mastr. h ntir mmory ontnt an thus rad out squntially. If th nd of mmory is rahd in th pross, thn addrssing will wrap around to th ginning of mmory. ata output will stop whn th Mastr fails to aknowldg and snds a O ondition. BU IVIY: MR R LV R BY R O LIN n MX = 7FH = 15 for 24W21 * = on t ar * * * * Figur 10. Byt Writ iming BU IVIY: MR R LV R BY R (n) n n+1 n+ O LIN * * * * Figur 11. ag Writ iming 7

8 2421 BU IVIY: MR R LV R O LIN * * * N O L 8 9 8th Bit OU NO O Figur 12. Immdiat ddrss Rad iming BU IVIY: MR R LV R BY R (n) R LV R O LIN * * * * Figur 13. ltiv Rad iming n O N BU IVIY: MR LIN LV R n n+1 n+2 n+x Figur 14. quntial Rad iming N O O 8

9 2421 G IMNION I 8, 300 mils IU YMBOL MIN NOM MX IN # 1 INIFIION B B L O VIW 2 1 L 2 B I VIW N VIW Nots: (1) ll dimnsions ar in millimtrs. (2) omplis with J M

10 2421 G IMNION OI 8, 150 mils 751B 01 IU O YMBOL MIN NOM MX B h IN # 1 INIFIION L θ 0º 8º O VIW h 1 θ L I VIW N VIW Nots: (1) ll dimnsions ar in millimtrs. ngls in dgrs. (2) omplis with J M

11 2421 G IMNION O8, 4.4x3 948L 01 IU O YMBOL MIN NOM MX B L 1.00 RF L1 θ º 8º O VIW 2 1 I VIW 1 L1 N VIW L Nots: (1) ll dimnsions ar in millimtrs. ngls in dgrs. (2) omplis with J MO

12 2421 G IMNION MO 8, 3x IU O YMBOL MIN NOM MX B L L RF L2 θ 0.25 B 0º 6º O VIW 2 IL 1 I VIW N VIW L2 Nots: (1) ll dimnsions ar in millimtrs. ngls in dgrs. (2) omplis with J MO-187. IL L1 L 12

13 2421 G IMNION FN8, 3x3 511L 01 IU L 2 IN#1 I IN#1 INX R 1 2 O VIW I VIW BOOM VIW YMBOL MIN NOM MX RF FRON VIW 0.65 Y L Nots: (1) ll dimnsions ar in millimtrs. (2) omplis with J MO

14 2421 xampl of Ordring Information rfix vi # uffix 2421 Y I G 3 ompany I rodut Numr 2421 mpratur Rang I = Industrial ( 40 to +85 ) = xtndd ( 40 to +125 ) (Not 14) Lad Finish G: Nidu Blank: Matt in ap & Rl (Not 15) : ap & Rl 3: 3,000 / Rl akag L: I W: OI, J Y: O Z: MO (Not 12) Z4: FN (3 x 3 mm) 10. ll pakags ar RoH-ompliant (Lad-fr, Halogn-fr). 11. h dvi usd in th aov xampl is a 2421YI G3 (O, Industrial mpratur, Nidu, ap & Rl, 3,000/Rl). 12. For availaility, plas ontat your narst ON miondutor als offi. 13. For additional pakag options, plas ontat your narst ON miondutor als offi. 14. xtndd mpratur availal upon rqust. 15. For information on tap and rl spifiations, inluding part orintation and tap sizs, plas rfr to our ap and Rl akaging pifiations Brohur, BR8011/. ON miondutor is linsd y hilips orporation to arry th I 2 Bus rotool. ll rand nams and produt nams apparing in this doumnt ar rgistrd tradmarks or tradmarks of thir rsptiv holdrs. ON miondutor and ar rgistrd tradmarks of miondutor omponnts Industris, LL (ILL). ILL rsrvs th right to mak hangs without furthr noti to any produts hrin. ILL maks no warranty, rprsntation or guarant rgarding th suitaility of its produts for any partiular purpos, nor dos ILL assum any liaility arising out of th appliation or us of any produt or iruit, and spifially dislaims any and all liaility, inluding without limitation spial, onsquntial or inidntal damags. ypial paramtrs whih may providd in ILL data shts and/or spifiations an and do vary in diffrnt appliations and atual prforman may vary ovr tim. ll oprating paramtrs, inluding ypials must validatd for ah ustomr appliation y ustomr s thnial xprts. ILL dos not onvy any lins undr its patnt rights nor th rights of othrs. ILL produts ar not dsignd, intndd, or authorizd for us as omponnts in systms intndd for surgial implant into th ody, or othr appliations intndd to support or sustain lif, or for any othr appliation in whih th failur of th ILL produt ould rat a situation whr prsonal injury or dath may our. hould Buyr purhas or us ILL produts for any suh unintndd or unauthorizd appliation, Buyr shall indmnify and hold ILL and its offirs, mploys, susidiaris, affiliats, and distriutors harmlss against all laims, osts, damags, and xpnss, and rasonal attorny fs arising out of, dirtly or indirtly, any laim of prsonal injury or dath assoiatd with suh unintndd or unauthorizd us, vn if suh laim allgs that ILL was nglignt rgarding th dsign or manufatur of th part. ILL is an qual Opportunity/ffirmativ tion mployr. his litratur is sujt to all applial opyright laws and is not for rsal in any mannr. UBLIION ORRING INFORMION LIRUR FULFILLMN: Litratur istriution ntr for ON miondutor.o. Box 5163, nvr, olorado U hon: or oll Fr U/anada Fax: or oll Fr U/anada mail: ordrlit@onsmi.om N. mrian hnial upport: oll Fr U/anada urop, Middl ast and fria hnial upport: hon: Japan ustomr Fous ntr hon: ON miondutor Wsit: Ordr Litratur: For additional information, plas ontat your loal als Rprsntativ 2421/