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AN-615

Abstract: C1995 DP8420A DP8422A F245 tcpb9 20R4D
Contextual Info: National Semiconductor Application Note 615 Lawson H C Chang March 1989 INTRODUCTION This application note describes interfacing the DP8422A DRAM controller also applicable to DP8420A 21A to the 68000 (16 MHz) with slower memories This design is based upon burst mode access by holding RAS low and toggling