mc68hc05ct4fn Freescale Semiconductor, Inc, mc68hc05ct4fn Datasheet - Page 113

• Manufacturer Part Number: mc68hc05ct4fn
• Description: Mc68hc05 Family Of Microcontrollers Mcus
• Manufacturer: Freescale Semiconductor, Inc

15.4.2 Read-Modify-Write Instructions
MC68HC05CT4
NOTE:
—
Rev. 2.0
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.
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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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1. Unlike other read-modify-write instructions, BCLR and
2. TST is an exception to the read-modify-write sequence
Table 15-2. Read-Modify-Write Instructions
BSET use only direct addressing.
because it does not write a replacement value.
Instruction Set
Instruction
General Release Specification
Mnemonic
BCLR
BSET
TST
COM
ROR
DEC
NEG
ASR
CLR
ROL
ASL
LSR
INC
LSL
(2)
(1)
(1)
Instruction Types
Instruction Set