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MC68HCL05P1A Datasheet(PDF) 83 Page - Freescale Semiconductor, Inc |
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MC68HCL05P1A Datasheet(HTML) 83 Page - Freescale Semiconductor, Inc |
83 / 124 page Instruction Set Instruction Types MC68HC05P1A — Rev. 3.0 General Release Specification Instruction Set 9.4.2 Read-Modify-Write Instructions These instructions read a memory location or a register, modify its contents, and write the modified value back to the memory location or to the register. NOTE: Do not use read-modify-write operations on write-only registers. 1. Unlike other read-modify-write instructions, BCLR and BSET use only direct addressing. 2. TST is an exception to the read-modify-write sequence because it does not write a replacement value. Table 9-2. Read-Modify-Write Instructions Instruction Mnemonic Arithmetic Shift Left (Same as LSL) ASL Arithmetic Shift Right ASR Bit Clear BCLR(1) Bit Set BSET(1) Clear Register CLR Complement (One’s Complement) COM Decrement DEC Increment INC Logical Shift Left (Same as ASL) LSL Logical Shift Right LSR Negate (Two’s Complement) NEG Rotate Left through Carry Bit ROL Rotate Right through Carry Bit ROR Test for Negative or Zero TST(2) Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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