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UPD17015 Datasheet(PDF) 14 Page - NEC |
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UPD17015 Datasheet(HTML) 14 Page - NEC |
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14 / 120 page ![]() 14 µPD17015 2. PROGRAM MEMORY (ROM) 2.1 OUTLINE OF PROGRAM MEMORY Fig. 2-1 outlines program memory. As shown in Fig. 2-1, program memory is addressed with a program counter. Program memory is used to store programs. The program counter is used to specify an address in program memory. Fig. 2-1 Outline of Program Memory Program counter Addressing Program memory Instruction 2.2 PROGRAM MEMORY CONFIGURATION Fig. 2-2 shows the configuration of program memory. As shown in Fig. 2-2, program memory consists of 1528 steps × 16 bits. Program memory therefore has addresses 0000H to 05F7H. All µPD17015 instructions are 16-bit one-word instructions. Each instruction can be stored at a single address of program memory. Fig. 2-2 Program Memory Configuration 0000H 05F7H 07FFH 16 bits 1.5K steps Undefined |
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