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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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UPD17062 데이터시트(PDF) 41 Page - Renesas Technology Corp |
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UPD17062 데이터시트(HTML) 41 Page - Renesas Technology Corp |
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41 / 298 page  39 µPD17062 Example 2. 5.3.2 Notes on Using Unmounted Data Memory As shown in Fig. 5-6, nothing is actually assigned to bit 0 (LSB) of address 72H of BANK1 of the port registers. If a data memory manipulation instruction is executed for this address, the following operations are performed: (1) Device behavior If a read instruction is executed, a 0 is read. Executing a write instruction results in no change. (2) Assembler behavior Normal assembly is performed. No error occurs. (3) Emulator (IE-17K) behavior If a read instruction is executed, a 0 is read. Executing a write instruction results in no change. No error occurs. M1 M2 M3 MEM MEM MEM 0.15H 1.15H 2.15H ; ; ; Bank Row address Column address BANK1 MOV M1, MOV M2, MOV M3, #0000B #0000B #0000B ; ; ; ; Assembler built-in macro instruction BANK ← 1 M1, M2, and M3 are defined symbolically in # for different banks, but are for BANK1 in this program. Thus, all of these three instructions write 0s to data memory address 15H in BANK1. Symbol definition pseudo instruction |
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