參數(shù)資料
型號: MC68HSC05J1ADW
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
封裝: SOIC-20
文件頁數(shù): 111/128頁
文件大小: 1650K
代理商: MC68HSC05J1ADW
Instruction Set
Instruction Types
MC68HC05J1A — Rev. 3.0
Technical Data
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.
Table 9-2. Read-Modify-Write Instructions
Instruction
Mnemonic
Arithmetic shift left (same as LSL)
ASL
Arithmetic shift right
ASR
Bit clear
BCLR(1)
1. Unlike other read-modify-write instructions, BCLR and BSET use
only direct addressing.
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)
2. TST is an exception to the read-modify-write sequence because it
does not write a replacement value.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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