Chapter7 Move - 68HC12 Data Movement Instructions Textbook...

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ELEC 2220 Computer Systems 68HC12 Data Movement Instructions Textbook Chapter 7 Sections 7.5 – 7.7
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ELEC 2220 Computer Systems Data movement instructions Move data between registers and memory. “Load” a register with a value from memory “Store” a register value in memory “Transfer” a value from one register to another “Exchange” data between registers Memory Registers load store transfer exchange
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ELEC 2220 Computer Systems Load (LDr) Instructions Copy memory content into a register r . Source: any addressing mode except for inherent The source operand is not changed Destination: register (A,B,D,SP,X,Y) (NOT PC) N, Z and V are updated (0 V). Mnemonics: 8-bit: LDAA, LDAB 16-bit: LDD, LDX, LDY, LDS
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ELEC 2220 Computer Systems LDAA instruction options
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Load Effective Address (LEA r ) Load X, Y or SP with an effective address. Source:
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This note was uploaded on 09/23/2011 for the course ELEC 2220 taught by Professor Staff during the Summer '08 term at Auburn University.

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Chapter7 Move - 68HC12 Data Movement Instructions Textbook...

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