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HMS39C7092 Datasheet(PDF) 39 Page - Hynix Semiconductor |
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HMS39C7092 Datasheet(HTML) 39 Page - Hynix Semiconductor |
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39 / 199 page  Flash MCU(HMS39C7092) ARM7TDMI Core Preliminary 39 2.4.4 ARM pseudo-instructions ADR The ADR pseudo-instruction loads a program-relative or register-relative address into a register. Syntax The syntax of ADR is: ADR{ condition} register, expression where: register is the register to load. expression is a program-relative or register-relative expression that evaluates to: • a non word-aligned address within 255 bytes • a word-aligned address within 1020 bytes. The address can be either before or after the address of the instruction or the base register. Usage ADR always assembles to one instruction. The assembler attempts to produce a single ADD or SUB instruction to load the address. If the address cannot be constructed in a single instruction, an error is generated and the assembly fails. Use the ADRL pseudo-instruction to assemble a wider range of effective addresses. If expression is program-relative, it must evaluate to an address in the same code area as the ADR pseudo-instruction. Otherwise the address may be out of range after linking. Example start MOV r0,#10 ADR r4,start ; => SUB r4,pc,#0xc |
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