PROJECT: . ADSP 2181 External Overlay and I/O Memory . wT A Septemoer 23/1997 The ADSP 2181 contains 16k word of program memory and 16k word of data memory. Sometimes this is not enough memory for customers to use with various projects. By connecting external overlay and I/O memory to the ADSP 2181, we gain technical knowledge like board layout and , experience with wiring external devices to the DSP chip. Also, we are able to verify published information about external overlay and I/O memory. Finally, we are also able to verify the functionality of the ICE and simulator with external overlay and I/O memory. | IMPLEMENTATION: In order to connect the external overlay and I/O memory to the ADSP 2181, the ADSP 2181 EZ-Kit Lite was used. The-EZ-Kit Lite contains two expansion connectors that would easily allow someone to connect external devices to the DSP chip. In this case, external memory. In order to connect the external memory to the DSP chip via the expansion connectors, a female header strip was soldered to the connector.. A separate wire-wrap board was used to hold the external 32k x 8 SRAM chips. The pins from the memory chips would be wired to a male header strip and the board could be easily attached to the female header strip on the EZ-Kit Lite. RESULTS: This project verifies the use of overlay memory with zero wait states as mentioned in the published information. Currently, the I/O memory is still in the process of debugging. Project is estimated to be completed within two weeks along with application note and schematics.Materials Used: _l. (1) ADSP 2181 EZ-Kit Lite Analog Devices, Inc. Part Number - ADDS-21xx-EZLITE 2. (5)32k x 8 SRAM chips. 12 ns, 0 waitstates from Integrated Device Technology, Inc. ' Part Number - 71256SA12TP 3 for external PM/DM Overlay e 2 for /O memory 3. (1) Dual Row 72:Pin male header strip from Sullins | . Part Number - SZ062-36 (DIGIKEY) 4. (1) Dual Row 72 Pin female header strip from 3M : Part Numbr - 929975-01-36 (DIGIKEY)| so aM | IO | kom (eca-0d) VIVa yeurayxg (Sd + Elv-ov) Udav So aM a0 S10WI9 1, (7a-8@) VLVG O/l (Olv-0Vv) uaav SWO SINd UM da SWOI td-0d C1V-0V T8T? dSadv AIOW DI O/T pue AepI9AO Wd/Wd preog uorsuedxg A10uloy(| I8l dSadV0} 2/8 RASH OVERLAY Paon. see 1/0 NEw ORY - SETI yoon. 028 Spas. ass FES pens casas > por pu x >pes sd ee eo oh PS oH SS agsretren Bane Mage aeany Daman lgaag- eaces fae SNe eR en jo Jiveneuneae ox Seeae Beeeennneae ox Gar zx * Son eA N POS me BORN TROK BO om mR NA BOSHHOTBSTOTDASAHSAGOSBGOO Pane ddnaeesnOwe goon o eeeedeeeesececss enn SAAN OER OO em eeccceneccecaccee GUGREROREE ithad > = _ S 3 = S = = = < s | e ~ i aT psf oloe es oe} SI wofoe <I ay os zi| = zf > a 2. 2 Ia 2l= i 2 af att Ye =te ef! dj e. 43 2 Jel . 3 I . 24 =~ fe Te _|* ole = -f2 1g it _ ba.76 * VIVGT Loel Se Tega sss 7e+ > Of Az . SIGUA ZUsUNrogaz ys AVONIH LUTAIAO HOsHd . Se eraty SaDIATO 90 TUNY : . ge Livsaszre a | i pievusssere SE LZlusgszi oo : 08 Mae : Ce ey oN 16 Ret ~ seons. UF ons iy Pet vt tu . oo ee ws zu gta $8 Ny Cl re 90 eu Z19 re N) 7 80 Oe 19 rb Ee eid SB ~ ato. $8 zo Su 616 9u NI PRO.) Og 0 su = ezg iu zte ie bo au 1z0 au Ny 1g 8 $0 QU bes zz0 by Pe N] tO au 30 bu bss 820 aid 810 "O18 0 ery (75h I> ig 5) TTd \) C7swa>ttg sa: 1 $3 TTe tz L768 >-+350: 30 Zz18 N C708 > FSG 30 ate 30 Z1Y L73A> OA C1Y bey N) [AER ~F30 3A ety aA E10 bes ; 33A Pty 323A rig QDA rTB | Th l , THA a) yA A (swi> [sea> : - ety ae] SWHYS 8 * ATE (EF) AYOWSW THYNYZLXGSRAMS 8 x MEMORY 2 /0 32 O16..023 rTI GU eet) wll uw uo > wir oa 7! = DOG en UUM MAM BOON 2 VURFOUNNANNS ae Zz A > poeoanoca ww ~ < | ida | . wo = > | TONS oe 4 foment Han OH TON lO so aj Cerner erearcac rare in pa Bone ef o i | Jy), : - y! ~ 7 152} co] 2 - . oN s - AEN eo - ic} - 7 . seat - u - Yo |r - > win: jemi} st 20 io . . VUUBANTONRKR AND 2 . UEOUoname TOO = ow > gaanaaa 1s _ a an a rd TON @ 1 af oe oe ae nwmnonwoamas Ju pj ceaeaccaaccatcaeaacacad Jn a A [SNinict | ANALOG DEVICES Title 1/0 MEMORY Nunbder REV of 232, 1997 Bheet Septamber Size Document Date: