XC68HC705JJ7 Motorola, XC68HC705JJ7 Datasheet - Page 196

• Manufacturer Part Number: XC68HC705JJ7
• Description: MICROCONTROLLER
• Manufacturer: Motorola

Instruction Set
14.4.2 Read-Modify-Write Instructions
Advance Information
196
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.
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
1. Unlike other read-modify-write instructions, BCLR and
2. TST is an exception to the read-modify-write sequence be-
Table 14-2. Read-Modify-Write Instructions
BSET use only direct addressing.
cause it does not write a replacement value.
Instruction Set
Instruction
MC68HC705JJ7 • MC68HC705JP7 — REV 4
Mnemonic
BCLR
BSET
TST
COM
DEC
NEG
ROR
ASR
CLR
ROL
ASL
LSR
INC
LSL
(2)
(1)
(1)
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