memory products - Al Kossow's Bitsavers

MK4501(N, K)-65/80110/12/15/20COMPOUND EXPANSIONThe two expansion techiques described above canbe applied together in a straight forward mannerto achieve large FIFO arrays (see Figure 12).BIDIRECTIONAL APPLICATIONSApplications, which require data buffering betweentwo systems (each system capable of READ andWRITE operations), can be achieved by pairingMK4501s, as shown in Figure 13. Care must betaken to assure that the ap.QL0priate flag is monitoredby each ~stem. (Le.,£f is monitored on thedevice where W is used; EF is monitored on thedevice where R is used.) Both Depth Expansion andWidth Expansion may be used in this mode.FIGURE 12. COMPOUND FIFO EXPANSIONoo·oaoo·oa00·017OO·ONA.W.RSOO·ON09·0NOla·ONNOTES1. For depth expansion block see DEPTH EXPANSION Section and Figure 9.2. For Flag operation see WIDTH EXPANSION Section and Figure B.FIGURE 13. BIDIRECTIONAL FIFO APPLICATIONAw. R,;"4F~ 5EF.l\ ° 1o.o·aO~.SYSTEM A - - - - - - - - - - - - - - SYSTEM B~R,;o.o·a~4 O.o·a501w.EF.FF.12/15408