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4. Row address setup and hold timeThe row address setup time to the TMS4500A is guaranteed by the MC68000L6 address valid toAS low timing (tAVSU.tAV-AEL = tAVSL = 35 ns (MIN, MC68000L6 Spec.)The row address setup time to the DRAMs is given by:tASR == tAVSL - tRAV-MAV + tAEL-REL *where tRAV-MAV = Time delay, row address valid to memory address valid (MAX 4500A-15Spec.)thus,tASR = (35 ..:. 40 + 27) ns= 22 nsThe row address hold time to the DRAMs is guaranteed by the TMS4500A to meet - 20 or fasterspeed devices.5. Data valid to write enableIn both circuit configurations, data valid to write low is guaranteed by the MC68000L6. For the circuitin Figure 1 A this is accomplished by gating CAS with UDS and LDS to give an early write condition.For the circuit in Figure 2A R/W is gated with UDS and LDS to give a late write condition. Datavalid to write enable for both circuits is given by:tDS = tDOSL + tp32where tDS = Data setup timetDOSL = Data out valid to DS low (MIN, MC68000L6 Spec.)tP32 = Propagation delay (MIN, 74LS32 Spec.)ThustDS = (35 + 8) ns= 43 ns6. Read access time from CASThe required access time for both access and access grant memory cycles must be calculated.The read access time from CAS on normal access cycles for the gated R/W configuration (Figure 2A)is given by:wherethus,tCAC = 2.5(T) - tCHSLx - tAEL-CEL - tt(CEL) - tDICLtCAC = Access time from CAStAEL-CEL = Time delay, ALE low to CAS st~rting low (MAX 4500A-15 Spec.)tt(CEL) = CAS fall time (MAX 4500A-15 SpeG')tDICL = Data, in to clock low (MIN, MC68000~6 Spec.)tCAC = [2.5(166) - 65 - 150 - 15 - 25] n~= 1.60 nsThe read access time on access grant cycles for the gated R/W configuration (Figure 2A) is given by:tCAC = 2.5(T) - tCH-CEL - tt(CEL) - tDICLwhere tCH-CEL = Time delay, CLK high to access CAS starting low (MAX 4500A-15 Spec.)9-76
thus tCAC = [2.5(166) - 140 - 15 - 25] ns= 235 nsFor the gated CAS configuration one SSI gate (74lS32) delay must be subtracted from the above values.MC68000l10 Design CalculationsThe MC68000l8/l1 0 design requires extra hardware to meet the TMS4500A ALE to ClK lowtimings (tCl-AEl, tAEl-cLl and DRAM CAS access time (tcAC). This is accomplished by providingtwo clocks (ClK,
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SMYOOO2.,MOS MemoryData Book1984II
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ALPHANUMERIC INDEX TO DATA SHEETSSM
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TABLE OF CONTENTSALPHANUMERIC INDEX
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MOSLSIRAMs, ROMs, EPROMsSELECTION G
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If you want to give it a try for yo
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INTERCHANGEABILITY GUIDEPART 1 -ALT
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INTERCHANGEABILITY GUIDEFUJITSUMB 8
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INTERCHANGEABILITY GUIDEMOTOROLAMCM
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INTERCHANGEABILITY GUIDETOSHIBATMM
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INTERCHANGEABILITY GUIDESTATIC RAMS
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Alphanumeric Index, Table of Conten
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GLOSSARY fTIMING CONVENTIONS/DATA S
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GLOSSARY/TIMING CONVENTIONS/DATA SH
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GLOSSARY!TIMING CONVENTIONS/DATA SH
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MOSLSITMS411616,384-811 DYNAMIC RAN
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TMS411616,384·811 DYNAMIC RANDOM·
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1MS411616,384-811 DYNAMIC RANDOM-AC
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TMS411616.384·81T DYNAMIC RANDOM·
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zIiADDRESSES~!.....RASCASwDO"*. i,*
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TMS411616,384-81T DYNAMIC RANDOM-AC
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MOSLSITMS416165,536-81T MULTIPORT M
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TMS416165,536-811 MULTIPORT MEMORYf
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TMS416165,536-BIT MULTIPORT MEMORYs
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TMS416165,536-0IT MULTIPORT MEMORYc
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TMS416165,536·BIT MUL TIPORT MEMOR
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TMS416165,536 o BIT MUL TIPORT MEMO
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TMS416165,536·811 MULTIPORT MEMORY
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zI[~~~co,.. twiRL) _,RAS:::~ SI l L
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TMS416165,536·BIT MULTIPORT MEMORY
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~ ___TMS416165.536-BIT MUL TIPORT M
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0>~a~~i'i_';:;Z~~~d~c:::• s:~lTl~
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TMS416165,536-8IT MULTIPORT MEMORY1
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MOSLSITMS4164, SMJ416465,536-8IT DY
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TMS4164, SMJ416465,536-811. DYNAMIC
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TMS416465,536-811 DYNAMIC RANDOM-AC
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TMS416465,536-811 DYNAMIC RANDOM-AC
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SMJ416465,536-011 DYNAMIC RANDOM-AC
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SMJ416465,536-81T DYNAMIC RANDOM-AC
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SMJ416465,536-011 DYNAMIC RANDOM-AC
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TMS4164, SMJ416465,536·81T DYNAMIC
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TMS4164, SMJ416465,536·8IT DYNAMIC
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z~~gz~.J:>.c1J
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Z~d~~~~0,'...."CIIICCCD:3of. twIRL)
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MOSLSITMS4256. TMS4257262.144·8IT
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TMS4256, TMS4257262,144·8IT DYNAMI
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TMS4256, TMS4257262,144-8IT DYNAMIC
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TMS4257262.144·8IT DYNAMIC RANDOM
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TMS4256, TMS4257262,144·BIT DYNAMI
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TMS4257262,144·81T DYNAMIC RANDOM
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Z~d~~~~.!..JcoNOTE:'CIIICO(1),- twI
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i:Z~d~~z~+:>0Co ......"CCICCCD:3og.
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MOSLSITMS4416. SMJ441616.384·WORD
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TMS4416, SMJ441616,384·WORD BY 4·
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TMS441616,384-WORD BY 4-BI1 DYNAMIC
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TMS441616,384-WORD BY 4-BIT DYNAMIC
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SMJ441616,384·WORD BY 4·BIT DYNAM
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SMJ441616,384-WORD BY 4-B11 DYNAMIC
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1MS4416, SMJ441616,384·WORD BY 4·
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TMS4416, SMJ441616,384·WORD BY 4·
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z~~~z@towRAs-{rCASAO·A7wDQG:::'.!A
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1:'QltC(()3oc..(()C3~~n_:::Z~~~;;;
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MOSLSITMS446465,536-WORD BY 4-BIT D
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TMS446465,536-WORD 8Y 4-81T DYNAMIC
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TMS446465,536·WORD BY 4·BIT DYNAM
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1MS446465,536·WORD BY 4·B11 DYNAM
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TMS446465,536·WORD BY 4·BIT DYNAM
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RASCAS----{! '.,ReIVIH i~VIL I tRLC
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~~~n_;;;z~~. ~~tTlg ;O~d ;;;t::=z~@
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~Z~~iZ~tw '"[:;-~~~~~:TCDCO ".;:r0~
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MEMORY SUPPORTLSITMS4500ADYNAMIC RA
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TMS4500ADYNAMIC RAM CONTROLLERpin d
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TMS4500ADYNAMIC RAM CONTROLLERarbit
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TMS4500ADYNAMIC RAM CONTROLLERswitc
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TMS4500ADYNAMIC RAM CONTROLLERacces
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TMS4500ADYNAMIC RAM CONTROLLERoutpu
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TMS4500ADYNAMIC RAM CONTROLLERtypic
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TMS4500ADYNAMIC RAM CONTROLLERtypic
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•••••MOSLSI65,536 X 4 Org
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TM4164EC465,536 BY 4·BIT DYNAMIC R
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MOSLSITM4164EL965,536 BY 9·BIT DYN
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TM4164EL965,536 BY 9-BIT DYNAMIC RA
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••••••••0MOSLSI65,5
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TM4164FL865,536 BY 8·BIT DYNAMIC R
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MOSLSITMS2516. SMJ251616.384-BIT ER
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TMS2516, SMJ251616,384-BIT ERASABLE
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TMS251616,384·BIT ERASABLE PROGRAM
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SMJ251616,384-BIT ERASABLE PROGRAMM
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o 441MS2516, SMJ251616,384·B11 ERA
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MOSLSITMS2532, SMJ253232,768·BIT E
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TMS253232,768-BI1 ERASABLE PROGRAMM
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MOSLSITMS2564, SMJ256465,536-BIT ER
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TMS256465,536-BIT ERASABLE PROGRAMM
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TMS2564 r SMJ256465 r536-BIT ERASAB
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MOSLSITMS2708, TMS27L08, SMJ2708, S
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TMS270B, TMS27LOBSMJ270B, SMJ27LOB1
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TMS2708. TMS27L081024·WORD BY 8·B
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SMJ2708, SMJ27L081024·WORD BY 8·B
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TMS2708, TMS27L08SMJ2708, SMJ27L081
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MOSLSITMS27162048·WORD BY 8·BIT E
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TMS27162048·WORD BY 8·BIT ERASABL
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TMS27162048-WORD BY 8-BIT ERASABLEP
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TMS2732A32,76B-BIT ERASABLE PROGRAM
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TMS2732A32,768-BIT ERASABLE PROGRAM
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TMS2732A32,768·BIT ERASABLE PROGRA
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MOSLSITMS276465,536-BI1 ERASABLE PR
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TMS276465,536·BIT ERASABLE PROGRAM
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MOSLSITMS27128131,072·BIT ERASABLE
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TMS27128131,072·BI1 ERASABLE PROGR
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TMS27128131,072·BIT ERASABLE PROGR
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TMS27128131,072·BIT ERASABLE PROGR
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MOSLSITMS46648192·WORD BY 8·BIT R
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TMS46648192·WORD BY 8·BIT READ·O
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MOSLSITMS47324096~WORD BY B·BIT RE
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MOSLSITMS47648192·WORD BY 8·BIT R
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MOSLSI, TMS49648192·WORD BY 8·BIT
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MOSLSITMS4712816,384·WORD BY 8·BI
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TMS4712816,384·WORD BY 8·BIT READ
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TMS4712816,384-WORD BY 8-BIT READ-O
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MOSLSITMS4725632.768·WORD BY 8·BI
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TMS4725632.768·WORD BY 8·BIT READ
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MOSLSITMS2114, TMS2114L1024·WORD B
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TMS2114, TMS2114L1024·WDRD BY 4·B
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TMS2114. TMS2114L1024·WORD BV 4·B
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ADVANCED MEMORYDEVELOPMENT•Fast A
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TMS2150CACHE ADDRESS COMPARATORabso
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TMS2150CACHE ADDRESS COMPARATORPARA
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MOSLSITMS40162048·WORD BY 8·BIT S
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TMS4016204H-WORD BY H-BIT STATIC RA
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TMS40162048-WDRD BY 8-BIT STATIC RA
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MOSLSITMS4044, TMS40L444096-WORD BY
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TMS4044, TMS40L444096·WORD BY 1·B
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TMS4044, TMS40L444096·WORD BY l·B
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MILITARYCMOSLSISMJ55172048-WORD BY
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SMJ5517204a·WORD BY a·BIT STATIC
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SMJ55172048·WORD BY 8·BIT STATIC
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SMJ55172048-WDRD BY 8-BIT STATIC RA
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SMJ5517204B·WORD BY B·BIT STATIC
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However, the TMS 4164 provides the
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EXPANSION OF 3242 FOR 256-CYCLE REF
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•9-6
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PAD OPENINGIN OVERCOATPADMETALPADME
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Figure 5 shows how the driver outpu
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cpI UO,leWJOJUI suo'le:>!ldd"f\)W(3
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The falling edge of RAS causes R 1
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~--------::~~:~:~~~:--------~~7,34(
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J-Lead AdvantageTexas Instruments P
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Surface Mount Component Availabilit
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fiSECONDARYVAPOR(VAPOR BLANKET)..Fi
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l>'C'2.ri'Q),..o·:::Jen5'....... o
Page 376 and 377: l>"C'2..(i"Dl...0":=(I)5"....o...3D
Page 378 and 379: An external refresh counter has bee
Page 380 and 381: l>'C'CC:)"Q).-+o·::::sen:ro ... ""
Page 382 and 383: uo!~ew"oJul suo!~ea!ldd"CD .,.., w7
Page 384 and 385: DOTCLOCKCLOCK ACLOCK C2 xWCLKRAS (A
Page 386 and 387: B. If dynamic RAM refresh is enable
Page 388 and 389: •9-38
Page 390 and 391: The TMS4416/TMS4500A board is arran
Page 392 and 393: RAS ~CAS \ I2AI \ I '-2BI '-iiD1Ro2
Page 394 and 395: 9-44
Page 396 and 397: ALEACXRASMAO-MA7CASFIGURE 1 -ALE LE
Page 398 and 399: The ALE high to ClK low time is giv
Page 400 and 401: ClKALEACXRASMAO-MA7CASREFREQROY•
Page 402 and 403: CDinN~1~12 MHzClKINClKOUTWE/iOclKRD
Page 404 and 405: UO!leWJOJUI SUOlle:ludd"com~'~,i'74
Page 406 and 407: coen(J)CLOCKWRITEREADROYALEA14-A5MS
Page 408 and 409: . Access Grant CyclesThe precharge
Page 410 and 411: whereta(C)tp(BFR)(-103 + tc2 - tp(B
Page 412 and 413: •9-62
Page 414 and 415: tt(REH)TCHLLtAEL-RELRAS rise time (
Page 416 and 417: . Refresh CyclesOn refresh cycles t
Page 418 and 419: wherethus,fCLKfCLKtCACfCLK[1/2 (tCA
Page 420 and 421: R/W approach does a normal read-mod
Page 422 and 423: II(0~""6 MHzI UO!leWJO,ulSUo!le:l!l
Page 424 and 425: ClKAlE.ACR\ ,----\,\ ,----R/W\ ,---
Page 428 and 429: CLKrWRITE -------I.~ ..~---REFRESH-
Page 430 and 431: The read access time on access gran
Page 432 and 433: implementations in order to relieve
Page 434 and 435: "C'2..c:rm...o·j(I)....5'o3...mo·
Page 436 and 437: RELATIVE MEMORY SIZEARCHIVAL STORAG
Page 438 and 439: increments till satisfied. This pro
Page 440 and 441: In the example shown in Figure 5, t
Page 442 and 443: »'C"E..crQ)r+0':::Jtil:;-....o...3
Page 444 and 445: •9-94
Page 447 and 448: 184LOGIC SYMBOLS1. INTRODUCTIONEXPl
Page 449 and 450: LOGIC SYMBOLS4.DIAGRAMATIC SUMMARYI
Page 451 and 452: lOGIC SYMBOLSWhen RAS goes low, it
Page 453 and 454: Alphanumeric Index, Table of Conten
Page 455 and 456: MECHANICAL DATAgeneralElectrical ch
Page 457 and 458: MECHANICAL DATAceramic packages -ce
Page 459 and 460: MECHANICAL DATAplastic packages (N
Page 461 and 462: MECHANICAL DATAceramic chip carrier
Page 463 and 464: Texas InstrumentsSemiconductor Tech
Page 465 and 466: TI Sales Offices TI DistributorsALA
Page 468: Printed in U.S.A.•TEXASINSTRUMENT
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