MC705P6A Motorola, MC705P6A Datasheet - Page 74

• Manufacturer Part Number: MC705P6A
• Description: Microcontrollers
• Manufacturer: Motorola

Instruction Set
13.3.2 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.
74
Do not use read modify-write operations on write-only registers.
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
MC68HC705P6A Advance Information Data Sheet, Rev. 2.1
1. Unlike other read-modify-write instructions, BCLR and
2. TST is an exception to the read-modify-write sequence
BSET use only direct addressing.
because it does not write a replacement value.
Table 13-2. Read-Modify-Write Instructions
Instruction
NOTE
Mnemonic
BCLR
BSET
TST
COM
DEC
NEG
ROR
ASR
CLR
ROL
ASL
LSR
INC
LSL
(2)
(1)
(1)
Freescale Semiconductor