5.6 EXTERNAL MEMORY INTERFACE EXTERNAL ROM
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INTEL 8051 Microcontroller
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8-bit Microcontroller Compatible with 8051 Products Special Microcontroller Features ... AD7: External memory interface Address/Data bit 7.
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AT89LP51ED2. AT89LP51ID2. Atmel-3714B-Microcontroller-8051-AT89LP51RD2-ED2-ID2-Datasheet-022013 WR: External memory interface Write Strobe (active-low).
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