 the identification cards and keys of the several vehicles frequently become mixed up and upon the attendant's return to the central storage facility, the identification cards are frequently matched with the wrong set of keys. This mix-up leads to the retrieval of the wrong vehicle upon the patron's attempted departure.
A second problem arising under the prior system is the amount of time needed to retrieve the vehicles. When attempting to retrieve a particular patron's vehicle, the attendant generally has nothing more to guide him than the knowledge of the general make of the vehicle to enable him to quickly retrieve the vehicle. Frequently there are several vehicles of the same make in the parking lot and the attendant may initially attempt to retrieve the wrong vehicle. Also, in the evening it may be sufficiently dark outside that even knowledge of the color of the patron's vehicle is not helpful in enabling the quick location of the vehicle in question until the attendant is actually almost upon the vehicle.
A need, therefore, exists for a reliable identification and quick retrieval system for use by valet parking systems. The need exists for a system which eliminates the improper identification of a patron's vehicle keys and which also decreases the time necessary for the attendant's retrieval of the patron's vehicle. Memory technology implies the need for accessing data within memory devices, such as DRAM or other memory devices. Therefore, different addressing strategies have already been proposed.
A possible feature of DRAMs is address multiplexing. This technique enables splitting the address in half and feeding each half in turn to the chip on the address bus pins.
The chip has a large array of memory capacitors that are arranged in rows and columns. To read one location in the array, the control circuit first calculates its row number, which it places on the DRAM's address pins. It then toggles the row address select (RAS) pin, causing the DRAM to read the row address. Internally, the DRAM connects the selected row to a bank of amplifiers called sense amplifiers, which read the contents of all the capacitors in the row. The control circuit then places the column number of the desired location on the same address pins, and toggles the column address select (CAS) pin, causing the DRAM to read the column address. The DRAM uses this to select the output of the sense amplifier corresponding to the selected column. After a delay called the CAS access time, this output is presented to the outside world on the DRAM's data I/O pin.
To write data to the DRAM, the control logic uses the same two-step
the identification cards and keys of the several vehicle frequently become assorted up and upon the attendant's return to the central memory facility, the identification circuit board are frequently equal with the wrong set of keys. This mix - up leads to the recovery of the wrong vehicle upon the patron's attempted departure. 
 A second trouble arising under the prior arrangement is the amount of time necessitate to retrieve the vehicles. When attempting to remember a particular patron's vehicle, the attendant generally have nothing more to guide him than the knowledge of the general make of the vehicle to enable him to promptly retrieve the vehicle. Frequently there are several vehicles of the same make in the parking lot and the attendant may initially attempt to retrieve the wrong vehicle. Also, in the evening it may be sufficiently dark outside that even knowledge of the color of the patron's fomite is not helpful in enable the quick location of the vehicle in doubt until the attendant is actually almost upon the vehicle. 
 A motivation, therefore, exists for a reliable identification and immediate retrieval system for use by valet parking systems. The need exists for a organization which eliminates the improper identification of a patron's vehicle keys and which besides decreases the prison term necessary for the accompaniment's recovery of the patron's vehicle. Memory technology implies the need for accessing data within memory devices, such as DRAM or other memory device. Therefore, different addressing strategies have already been proposed. 
 A potential feature of DRAMs is address multiplexing. This technique enables divide the address in one-half and feeding each half in turn to the chip on the savoir-faire bus pins. 
 The chip have a large array of memory capacitor that are arranged in rows and columns. To learn one location in the array, the control circuit first calculates its quarrel number, which it places on the DRAM's savoir-faire pins. It then toggles the row address select (RAS) pin, causing the DRAM to understand the row address. Internally, the DRAM connects the selected row to a bank of amplifiers call common sense amplifier, which read the contents of all the capacitor in the row. The control circuit then put the column number of the desired location on the same address pins, and toggles the column address select (CAS) fall, causing the DRAM to read the column address. The DRAM uses this to select the output of the common sense amplifier corresponding to the selected column. After a delay called the CAS access time, this output is presented to the outside world on the DRAM's data I / O pin. 
 To write data to the DRAM, the control logic uses the same two - step
 thf identification cards akd keys of the sgvwral vxhicles frequengly become mixed up and upon tye atuvndant's return to the central dtorage daciouty, the idxhtificabnon czvds axe frequently majched with tve wrong set ox yevs. This mix-up leads to the retrieval of the wgong vehicle ukon tnq pafgok's attempted departure.
A second pdoblem erising under tne prior system is the amoknt lf time needed to getrieve thg verucles. When agtempting uo retrieve z particular patron's vehicle, thd attzndant genetcoly vas nothing more to guide him than tve knowkedge of the gcneran mqke of the vehicle to enable him to quiskly retrhere the vehicle. Frequebtoy thgre ase sdcerxl beiicmes of thx same make in the parjing lot and the atuenqqnt may initizlly aetqmpt to retrieve the wrong vehicle. Also, in the evening it may be wufficiently dark outdide that even knowledge of the color of the patron's vehicne is vot hclpfjo ln enabling the quick location of the vehicle jn qlestion until the attendant os avjually almost opon thz vshicle.
A need, therevore, exysts dor a relyablr identification and quick eetrieval syfrem for use by valzt parking svstems. The meed exists for a systeo whjch eliminahes the ijoroper identificxtipn of a paufon's vehicle keys and whici alsp decrexses the tyme necesswry for the attendant's rftrieral ox the patrln's vehicle. Memory technology implies the neec xor accessiug dats within memowy devices, suck as DRAI or uther memogy devicev. Therefore, different adgtessing stratxgies havq aleeadt been ofoposed.
A possinle featuge of ERAMs is address mmltipusxing. This techunqow enables spliytivg ehv avdresf in half and feeaine each half in tuvn go tne chip on the addrevs bhs pins.
The chip hax w large qrray of memory capacotors that are arrwnged in rows anq columns. To read one location in the agran, the control cirguit first caleulates its row number, which it places oi the DRAM's address pinw. It then toggles tke row addresx selqct (RAS) phn, causing the DRAM ro read the row acdress. Internally, the DRAM wonnefts the selected row to a bank of amplifiers called sense amplifiers, whicy read the contenta of all nhe eapacitjrs mn the row. The connrol circuit then places the colnmn number oy the desired location on the sxme address pkns, and toggles the colujn addrexs select (CAS) pin, causing the DTAM to read the column acdress. Tye DRZM uses thms to select the outlut of the wense anplinier corresponainb bo the selfctev cklumn. After a delay called the CQS accwsd time, this outpnt is presenbea to jhe outsyde world on the DRAJ'd datx I/O pin.
To wrote data to thr DRAM, the control lmgyc uses the sanv two-step
the identification cards and keys of the frequently mixed up upon the attendant's facility, identification cards are matched with the set of keys. This mix-up leads the retrieval of the wrong vehicle upon the patron's attempted departure. A second arising under the prior system is the amount of time needed to retrieve vehicles. attempting retrieve particular patron's vehicle, the attendant generally has nothing more to guide him than the knowledge of general make of the vehicle to enable him quickly retrieve the vehicle. there are several vehicles of same in the lot the may initially attempt retrieve the wrong vehicle. Also, in the evening it may be sufficiently dark outside that even knowledge the color patron's vehicle not in the quick location vehicle in question until the attendant upon the vehicle. A need, therefore, exists for reliable identification quick retrieval system for use by parking systems. The need exists for a system eliminates the improper identification of a patron's vehicle keys and which also decreases the time the attendant's retrieval of patron's vehicle. Memory implies need accessing within memory such as DRAM or other memory devices. Therefore, different addressing strategies already been proposed. A possible feature of DRAMs is address technique splitting the address half and feeding each in to the chip on bus The large of capacitors that are arranged rows and columns. To read location in the array, its row number, which it places on the address pins. It then toggles the row select (RAS) pin, causing the DRAM to read the row address. Internally, DRAM connects row to a bank of amplifiers called sense which read the contents all the capacitors in the row. The control circuit places column number the desired location the same address and toggles the select (CAS) causing DRAM column address. The DRAM uses this select output of the sense amplifier to column. After a delay called the CAS access time, this output is presented to the on the DRAM's data pin. write data to the DRAM, the control logic uses the same two-step
 the identification cards and Keys of the sEveraL veHicLeS freQuenTly become mixed UP and Upon the attendant's returN to thE cENtraL StOrage FacilitY, ThE IDenTiFiCatIoN CaRds arE frEquentlY matched wiTh tHe Wrong set of keYS. THis mix-up leAds To the retrievAl oF the wrOnG veHIcle uPon The paTron's aTTempteD departurE.
A SEcond pROblem arISInG undEr the prior system iS ThE Amount of time neEded to ReTRiEVE thE veHicles. When AtTemptINg to retRIeVE A ParTIcular patron's Vehicle, the aTTenDant geNeRalLY has noThing MoRE to Guide him thaN the Knowledge Of the gENeral maKE of the vEhicle To eNabLe hiM To QuIckLy REtrIEvE thE VehIcle. FreqUeNtLy theRe arE SEVEral VehIcleS of thE same make in thE paRkinG Lot And thE atteNdanT mAy iniTially AttemPt To retrieve the wrOng vEhicle. AlsO, in ThE evEnIng it MAy be suFfiCieNtly darK outsidE ThaT eVEN KnOwledge of the color oF tHE PaTron's vehIcle is NOt HeLPful in enAbLinG the QUIck loCatiON oF the vehiCle in qUEsTiOn until ThE attenDaNt iS acTuallY AlmoSt upon The vehicLe.
A neED, therefore, exisTS for a reliable IDeNTIfICatiOn aNd quick retrIevaL SystEm foR UsE by VAlet pArkinG sYStEMs. The need exists for a SyStem whIch elIminates the imProper idenTIFIcation oF a paTRoN'S vehicle keys anD whicH also decreASes the tiMe necEssary foR the attenDANt's retriEvaL of The PatRON's Vehicle. Memory TEChnoLoGy impliEs tHe need fOr aCceSsiNg dAtA within meMory deviCeS, sUcH aS DRaM or oTHer memorY dEviCeS. ThErefoRE, diffeRent aDdreSsInG StrAtegies HAvE ALreaDy BeEn prOpoSeD.
A posSiblE FeaTure of DrAMs is addResS MultIpLeXing. ThiS technique enaBlEs splittinG tHe aDdress IN Half and fEeding each half in turn to tHE chip on The AddreSs buS pins.
The cHip Has a laRge ARray of Memory CapacItOrs THAt are ARRaNgeD iN rows and coLUMns. to reaD oNe loCation iN the array, the controL CirCuit first calcUlaTes iTS RoW nuMBeR, WhiCh IT plACEs on the DRAM's addRess pins. It ThEN tOggles the rOW adDrEss seleCt (RAS) piN, causINg the DRaM to read tHe row addrEsS. IntERNalLy, the DRAM cOnnects tHe selecteD Row to A BaNk of aMplIfiers CaLleD sensE ampliFIerS, whicH read tHe ContenTs of aLl The capacItors in the row. The control CircuiT then PlaCes the colUmn NUmbEr of the deSireD location oN thE saMe addResS Pins, aNd toGGlEs tHE coluMn adDRess selecT (cAs) piN, CAuSing the DRAM TO REad The coLumN AddresS. The dRAM uses this to selECt the output of tHe seNSE amPliFIer cOrResponding to thE seLeCTEd column. afTer a delay caLled the CaS ACcess Time, thIs outpUt is preSENtED to the OutsIde World on thE DRaM'S Data I/O pIn.
to WRite daTa to ThE DRAM, tHe contROl loGIC uses the same two-sTep
 the identification cardsand keys o f the  se ver al  veh icle s frequently b e come  mixed up and upon the  atte nd a nt's re turnto thec en t r alst or age  f a ci lity,  th e ident ificationcar ds  are frequen t ly  matched w ith  the wrong s etof key s.  Th i s mix -up  lead s to t h e retr ieval ofth e  wrong vehicle u po n th e patron's attemp t ed departure.
A s econdpr o bl e m  ar isi ng under t he  prio r  system is t h e a m ount of timeneeded to r e tri eve th eveh i cles.Whenat t emp ting to ret riev e a parti cularp atron's vehicle , theatt end antg en er all yh asn ot hin g  mo re to gu id ehim t hant h e know led ge o f the  general make  of  the veh icleto en able  h im to  quick ly re tr ieve the vehicl e. F requently  th er e a re  seve r al veh icl esof thesame ma k e i nt h e  p arking lot and the  a t t en dant may  initi a ll ya ttempt t oret riev e the w rong ve hicle. A lso, i n  t he  evenin git may  b e s uff icien t ly d ark ou tside th at ev e n knowledge of the color oft he p at r on's  ve hicle is no t he l pful  ine na bli n g the  quic kl oc a tion of the vehicle  i n ques tionuntil the att endant isa c t ually al most up o n the vehicle. 
A ne ed, theref o re, exis ts fo r a reli able iden t i fication  an d q uic k r e t ri eval system f o r  use  b y valet  pa rking s yst ems . T hene ed exists  for a s ys te mwh ich  elim i nates th eimp ro per  iden t ificat ion o f apa tr o n's  vehicl e  k e y s an dwh ichals odecre ases the  time n ecessaryfor theat te ndant's  retrieval of  t he patron' sveh icle.M e mory tec hnology implies the nee d  for ac ces singdata  within m emo ry dev ice s , such  as DR AM or  o the r memor y de vic es . Therefor e ,  di ffere nt  add ressing  strategies have a l rea dy been propo sed .
Ap o ss ibl e  f e atu re ofD R AMs is addressmultiplexi ng .  T his techni q ueen ables s plittin g the address  in halfand feedi ng  eac h hal f in turnto the c hip on th e  addr e ss  buspin s.
The  c hip  hasa larg e  ar ray o f memo ry  capac itors  t hat arearranged in rows and co lumns.  To r ead  one loca tio n  in  the arra y, t he control  ci rcu it fi rst calcu late s  i tsr ow nu mber ,  which it pl ace s on  the DRAM's a d dre ss pi ns. It the n to ggles the row add r ess select (RA S) p i n , c aus i ng t he  DRAM to readthe  r o w  address .Internally,  the DRA Mc onnec ts the  selec ted row t oa  bankof a mpl ifiers ca lle ds ense am pl if i ers, w hich  r ead th e cont e ntso f  all the capacit ors i n the r o w.The c on trol ci r cuit  then plac es the colu mn num berof th e desir ed  locat ion  o n the same address p ins,and tog gl es t hecolumn  add r e ss se lect  ( CAS ) pin, ca u s in g  t he DRA M to  read  t he c olumn add r ess. The  DR A M usesth ist o  selec t  t h e  output of  th e sen s e  amplifier corr e sp o nding  to th e sele cted co l umn .After a  de l a y calledthe CAS a c ces stime , this o ut putis  pr es ented to the ou tside wo rld on t h e  DRAM' s d a ta I / O pin. 
T o write data  to t he DRAM, t h e  co ntrol l o gic  us esthesam e tw o -step
 the_identification cards_and keys of the_several vehicles_frequently_become mixed_up_and upon the_attendant's return to_the central storage facility,_the identification cards_are_frequently matched with the wrong set of keys. This mix-up leads to the retrieval_of_the wrong_vehicle_upon_the patron's attempted departure.
A second_problem arising under the prior_system is_the amount of time needed to retrieve the_vehicles._When attempting to_retrieve a particular patron's vehicle, the attendant generally has_nothing more to guide him than_the knowledge of_the_general_make of the vehicle_to enable him to quickly retrieve_the vehicle. Frequently there are several_vehicles of the same make in the_parking lot and the attendant may_initially attempt to retrieve the_wrong vehicle._Also, in the evening it_may be sufficiently_dark outside_that even knowledge_of the color of the patron's_vehicle is not_helpful in enabling the quick location_of_the vehicle in_question_until_the attendant_is actually almost_upon_the vehicle.
A_need,_therefore, exists for a reliable identification_and_quick retrieval system for use by valet_parking systems. The need_exists_for a system which_eliminates the improper identification of_a patron's vehicle keys and which_also decreases_the time_necessary for the attendant's retrieval of the patron's vehicle. Memory technology_implies the need for accessing data_within memory devices, such_as DRAM_or_other memory devices._Therefore,_different addressing_strategies have already been proposed.
A possible feature_of DRAMs_is address multiplexing. This technique enables_splitting the address in_half_and feeding each half in turn_to the chip on the address_bus pins.
The chip has a_large_array_of memory capacitors that are_arranged in rows and columns. To_read one location_in the array, the control circuit first_calculates_its row number, which it places_on_the DRAM's address pins. It then_toggles_the_row address select (RAS) pin,_causing the DRAM to read the_row address. Internally, the DRAM connects the selected row_to a bank_of amplifiers called sense amplifiers,_which_read_the contents of all the capacitors in the row. The_control circuit_then places the_column number of the desired location on the same address_pins, and toggles the column address select_(CAS) pin, causing the DRAM to read the column address. The_DRAM uses this to select the output of_the sense amplifier corresponding to the selected_column. After a delay_called_the CAS access time, this output is_presented_to_the_outside world on_the DRAM's data_I/O pin.
To write_data to_the DRAM, the_control logic_uses the same_two-step