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UPD17062 데이터시트(PDF) 20 Page - Renesas Technology Corp |
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UPD17062 데이터시트(HTML) 20 Page - Renesas Technology Corp |
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20 / 298 page ![]() 18 µPD17062 2. PROGRAM MEMORY (ROM) Program memory stores the program to be executed by the CPU, as well as predetermined constant data. 2.1 CONFIGURATION OF PROGRAM MEMORY Fig. 2-1 shows the configuration of program memory. As shown in Fig. 2-1, the capacity of the program memory is 8K bytes (3968 × 16 bits). Locations in program memory are addressed in units of 16 bits. The total address range is from 0000H to 0F7FH. Memory is divided into pages. The range of page 0 is from 0000H to 07FFH, while that of page 1 is from 0800H to 0F7FH. The range from 0800H to 0F7FH can be used as the CROM (character ROM) area in which the display patterns for the IDC are stored. If this area is not used as CROM, it can be used as a program area. The range from 0000H to 00FFH is a table reference area. The area is used by the JMP @AR, CALL @AR, MOVT, PUSH, and POP instructions. Fig. 2-1 Configuration of Program Memory Address Program memory (ROM) 16 bits Page 0 Page 1 (area that can be used as CROM) 3968 steps 0000H 07FFH 0800H 0F7FH b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 |
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