AM8257 AMD | Alldatasheet
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- L ) | _ Am8257/9557 - oO \\or _/ S ? 301 “y ol ct “ Programmable DMA Controller oot | Woy Advanced Micro Devices _~ 30 | Aamo KY Advanced MOS/LSI Tie a dort a. 2/5 og DISTINCTIVE CHARACTERISTICS GENERAL DESCRIPTION JO 1/667 The Am8257/9557 is a four channel Direct Memory Access con- @ Direct plug-in replacement for Intel 8257 Plugin rep troller which permits the high speed transfer of data directly @ Four DMA channels with individual word count and between peripherals and memory in microcomputer systems. address registers When a peripheral request is received, the Am8257/9557 re- 7 solves the request priority, issues a HOLD signal to the host © Single TTL clock processor, assumes control of the system busses, and generates Single +5V supply the memory address necessary for the data transfer. It maintains a byte count for each channel and issues a terminal count signal @ Standard 40 pin DIP upon completion of the programmed number of transfers. @ Military version available For improved functional and performance characteristics use the Am9517A Multimode DMA controller. @ 100% MIL-STD-883 reliability assurance testing BLOCK DIAGRAM CONNECTION DIAGRAM roo iow jz eS a a6 Ew Cj; 2 As prot mem cls 9 M ~ in MARK cs 9 Te mw K—_— neaoy —=C] 6 s ER as Era HLDA > od 22 ok READ/ E} ome " apsTe Cie 3 al Reser ware Ki YS aw =—C]o 2 Le 40 Locie 3 oq ry é onoz HRO 10 amgss7 3" vee at 3 S cu 30 fF bo n a cu —=] 2 ae 0: a3 z BAKE RESET (J 13 2 {4 2 ACK? Cu 7 03 s DACKS J is 26 pa a4 roe bras C] 16 3 DacKS s oraz a mf DaCKI a6 <—__ brat Cis 23 os WwrenFace nEaDY EREA ono | 20 ap o7 mew RESOLVER Ew AEN ‘ApsTB Top View 1c Pin 1 is marked for orientation. MARK MOS-474 MOS-475
ORDERING INFORMATION
_ Package Type Ambient Temperature Order Number . Molded DIP AM9557PC/P8257 , O°C = Ta = +70°C | amess7DC/08257 Hermetic DIP ‘AM9557CC/C8257 Hermetic DIP —55°C < Ta < +125°C | AM9557DM “Hermetic = Ceramic = DC = CC = D-40-1. Copyright © 1980 by Advanced Micro Devices, Inc. 1
MAXIMUM RATINGS above which useful life may be impaired Ambient Temperature Under Bias 0 to 70°C Storage Temperature -65 to +150°C . Voltage on Any Pin with Respect to Ground —0.5 to +7.0V Power Dissipation 1.0W a) The products described by this specification include internal circuitry designed to protect input devices from damaging accumulations of static charge. It is suggested, nevertheless, that conventional precautions be observed during storage, handling and use in order to avoid exposure to excessive voltages. DC CHARACTERISTICS (T, = 0 to 70°C, VCC = +5.0V +5%, GND = OV) Parameters Description Test Conditions Min Max Units Lc a [oss [vos | ee ee a fm rpateniae | wevecww Te [mw [ior [ower tearagoGuingFear [ vour=vecwo YY Tk CAPACITANCE (T, = 25°C; VCC = GND = OV) Parameters Description Test Conditions Min Typ Max Units ae
AC CHARACTERISTICS: PERIPHERAL (SLAVE) MODE (Ty = 0 to 70°C, VCC = 5.0V +5%, GND = OV, Note 1) Am9080A Bus Parameters Parameters Description Test Conditions Min Max Units ee ee OO Other Timing: a ee OS Notes: 1. All timing measurements are made at the following reference voltages unless otherwise specified: Input “1” at 2.0V, “0” at 0.8V, Output “1” at 2.0V, “0” at 0.8V. 2. CL = 100pF. PERIPHERAL MODE TIMING DIAGRAMS Write Timing: Read Timing: tAW- avoness Bus ee aooresseus, MTD = — ee ara aus f] | 3 wore cw | OW. -tWD- {RD 10F Reset Timing: : Input Waveform for AC Tests: 0.8v POINTS ~ o.8v ~ RESET oasy 1RSTO vec
AC CHARACTERISTICS: DMA (MASTER) MODE (T, = 0 to 70°C, VCC = 5.0V +5%, GND = OV) Timing Requirements Parameters Description Min Max Units eS [wet Ate an a TRACKING PARAMETERS Suppose the following timing equation is being evaulated, Signals labeled as Tracking Parameters (footnotes 4-7 under AC TA(MIN) + TB(MAX) <= 150ns Specifications) are signals that follow similar paths through the and only minimum specifications exist for TA and TB. If TA(MIN) silicon die. The propagation speed of these signals varies in the is used, and if TA and TB are tracking parameters, TB(MAX) can manufacturing process but the relationship between all these be taken as TB(MIN) + 50ns. parameters is constant. The variation is less than or equal " to 50ns. TA(MIN) + (TB(MIN)* + 50ns) < 150ns *If TA and TB are tracking parameters. a i oN Tha vas oA vA? TROORES aus = {fas ass moa moon Pe] a an SR GW ‘ameas/9657 vase} ——— mark i | re 4 w | | come ames x tak) io SS eee ~ Syne snc | | om a SS m ae bes ain, Ce a reser -p—[neser 3 sre id ESN arn fovIn rN Basic DMA Configuration.
AC CHARACTERISTICS: DMA (MASTER) MODE (Ty = 0 to 70°C, VCC = 5.0V +5%, GND = OV) Timing Requirements Parameters Description Min Max Units [wa [What oibeay ron oT SISO Messuesazowoed dT | [ar | Wat or aay tom 61181 $0) assured ataovy (ows) | fm s| a AENL Daley om 0 (S(t 1 ee [ tAEA _| Address (AB) (Active) Delay trom AENT (St) (Note 4) [2 | | - (| Hirane | Addins (A) ice) Deny tomer Si) Wowa SSCS [FAB | Adress (AB) Fea) Ooay tomer so ow | Te fnew | Ades (AB) Stable Oaayrom et Hy Woe TTL | [aw | Adoss 8) Sable Hoa tom (st ow2) | wes fe [une [aden a6) vaio Hoste ADT St.smaea | TL a [aoe | Addoss (08) (Acne) Oaay rom ers oeea | Oe Fro | Adress 08) Feat Dea tom or (S2)(Now2) «dH | wT Fass | Ades (08) Stn io Ads Stil i,52,@06 —S*YC wf [is | Ades (8) (aio) Hos tom Adsoss Snel Siow) | wf || fisn | Adtose Siti Oouy tomar snow TT |e [srr | Adtoss Sibi Dosy tomar sainowy STS || [ow | actos sabe wah i.sa. qe SSSCSCS~C~rC two fT [asc | FOL or Wn Ooty tor Adds Sabi] Ge)WawH || Te Fee | REL or WA (xn) Ona tom Atos 0) oan Gaiwoes |_| +t | [~ [eerermimmrrowere [|e = — TC/Mark| Delay from 6 (S4) (Notes 1, 5) a [ct | ABT Demy tom 6 (4, S) ans WET Ooty fom ot G4) usa) | «| mms | frac | AooWR che toner eymoe Tw Paro [RO o WF oan om or snow YLT firw | RB wan se,siocsy moe) SSSCSC~S~S~d ww | ww | Wwe ss spqoey es fs [wwe | Wr em wan Gacy noon SSSC~C~S~—s ws] Te Notes: 1. Load = 1 TTL. 2. Load = 1 TTL + SOpF. 3. Load = 1 TTL + (RL = 3.3K), VOH = 3.3V. 4. Tracking Parameter. 5. AIAK < 50ns. 6. AtOCL < 50ns. 7. AtDCT < S50ns.
CONSECUTIVE CYCLES AND BURST MODE SEQUENCE . Note: The clock waveform is duplicated for clarity. The Am8257/9557 requires only one clock input. Figure 1. Consecutive Cycles and Burst Mode Sequence.
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—_ “La e ee ee : ee ee ce *From edge of end lead. a 40-Pin Molded DIP AD ARAAAAARARAR ARAN AA». edhe as LE —Ie om TATA TATA ACERT ATAT TATE : ooo [arr] oth ae ee . be [e | 500 | ss | at fj fe | 060 [so | c © [28 | 0 | PAST Ro REPRE Metallization and Pad Layout om on _iom 2 ms acm 3 3A few 2 ne wank 5 x te ere Limca CPCPLOL OTS ey READY 6 es oO eee f was MLOA 7 L oe STE J un aosTs 6 IF pores =. See ‘ADVANCED wna 10 ost ayo fl vee eon DEVICES, INC. 3» { an » 0 P.O. Box 453 cx 1 — itt a ime ‘Sunnyvale, | 7 ccser 13 — 2 | a moe California 94086 onc « A ae as : (408) 732-2400 on 1s iret Pee ee 2s os TWX: 910-339-9280 onas x = Las oacxs TELEX: 34-6306 ona te ao TOLL FREE nae 8 2 08 (800) 538-8450 Advanced Micro Devices cannot assume responsibility for use of any circuitry described ‘other than circuitry embodied in an Advanced Micro Devices’ product. 6-80