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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UPD17062 датащи(PDF) 31 Page - Renesas Technology Corp |
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UPD17062 датащи(HTML) 31 Page - Renesas Technology Corp |
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31 / 298 page  29 µPD17062 5. DATA MEMORY (RAM) Data memory is used to store data for operations and control. Simply by executing an appropriate instruction, data can be written to and read from data memory at any time. 5.1 STRUCTURE OF DATA MEMORY Fig. 5-1 shows the structure of data memory. As shown in Fig. 5-1, data memory is divided into three units called banks. These three banks are called BANK0, BANK1, and BANK2. In each bank, data is assigned an address in units of four bits. The high-order three bits are called the row address, while the low-order four bits are called the column address. For example, the data memory location having row address 1H and column address AH is referred to as the data memory location having address 1AH. One address consists of four bits of memory. These four bits are called a nibble. Data memory is divided into the blocks described in Sections 5.1.1 to 5.1.5, according to function. |
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