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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UPD77019 датащи(PDF) 21 Page - NEC |
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UPD77019 датащи(HTML) 21 Page - NEC |
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21 / 56 page  21 µPD77018A, 77019 2.4.2 Data Memory Outline The µPD77018A and the µPD77019 each has two data memory areas (64K words × 16 bits each) in X and Y memory areas. Every memory areas consists of 3K words × 16 bits data RAM and 12K words ×16 bits data ROM . As the µPD77018A and the µPD77019 each has interface with the external data memory, 16 K words × 16 bits external data memory space can be added to X/Y memories. Each data memory area includes on-chip peripheral area which consists of 64 words. When the external data memory area is accessed, instruction cycle can be 2 or more by wait function. Caution When any data is accessed or stored to system address, normal operation of the device is not assured. 3840H 383FH 0000H System (1984 words) System (11K words) Data RAM (3K words) External Data Memory (16K words) PD77018A, 77019 Peripheral (64 words) 4000H 3FFFH FFFFH System (20K words) 0C00H 0BFFH 7000H 6FFFH C000H BFFFH Data ROM (12K words) 3800H 37FFH µ |
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