MC68HC705P9CDW FREESCALE [Freescale Semiconductor, Inc], MC68HC705P9CDW Datasheet - Page 54

• Manufacturer Part Number: MC68HC705P9CDW
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Central Processor Unit (CPU)
4.7.2.2 Read-Modify-Write Instructions
Technical Data
54
NOTE:
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.
Do not use read-modify-write operations on write-only registers.
Freescale Semiconductor, Inc.
For More Information On This Product,
1. Unlike other read-modify-write instructions, BCLR and BSET
2. TST is an exception to the read-modify-write sequence because
Central Processor Unit (CPU)
Arithmetic Shift Left (Same as LSL)
Arithmetic Shift Right
Bit Clear
Bit Set
Clear Register
Complement (One’s Complement)
Decrement
Increment
Logical Shift Left (Same as ASL)
Logical Shift Right
Negate (Two’s Complement)
Rotate Left through Carry Bit
Rotate Right through Carry Bit
Test for Negative or Zero
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use only direct addressing.
it does not write a replacement value.
Table 4-2. Read-Modify-Write Instructions
Instruction
MC68HC705P9 — Rev. 4.0
Mnemonic
BCLR
BSET
TST
COM
ROR
DEC
NEG
ASR
CLR
ROL
ASL
LSR
LSL
INC
(2)
(1)
(1)
MOTOROLA