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D17133CS Datasheet(PDF) 266 Page - NEC |
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D17133CS Datasheet(HTML) 266 Page - NEC |
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266 / 289 page  CHAPTER 19 ASSEMBLER RESERVED WORDS 19.1 MASK OPTION PSEUDO INSTRUCTIONS To create µPD17120, 17121, 17132, and 17133 programs, it is necessary to specify whether pins that can have pull-up resistors have pull-up resistors. This is done in the assembler source program using mask option pseudo instructions. To set the mask option, note that D171 ××.OPT file in the AS171×× ( µPD171×× device file) must be in the current directory at assembly time. Specify mask options for the following pins: • RESET pin • Port 0D (P0D3, P0D2, P0D1, P0D0) • Port 0E (P0E1, P0E0) 19.1.1 OPTION and ENDOP Pseudo Instructions The block from the OPTION pseudo instruction to the ENDOP pseudo instruction is defined as the option definition block. The format for the mask option definition block is shown below. Only the three pseudo instructions listed in Table 19-1 can be described in this block. Format: Symbol Mnemonic Operand Comment [label:] OPTION [;comment] • • • • ENDOP 251 |
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