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参数资料
型号： MC68HC805P18CP
厂商： FREESCALE SEMICONDUCTOR INC
元件分类： 微控制器/微处理器
英文描述： 8-BIT, EEPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
封装： PLASTIC, DIP-28
文件页数： 16/144页
文件大小： 1292K
代理商： MC68HC805P18CP
Advance Information
MC68HC(8)05P18 — Rev. 2.0
112
Instruction Set
MOTOROLA
Instruction Set
12.4.2 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. The test for negative or zero instruction (TST) is an
exception to the read-modify-write sequence because it does not write a
replacement value. Table 12-2 lists the read-modify-write instructions.
12.4.3 Jump/Branch Instructions
Jump instructions allow the CPU to interrupt the normal sequence of the
program counter. The unconditional jump instruction (JMP) and the
jump- to-subroutine instruction (JSR) have no register operand. Branch
instructions allow the CPU to interrupt the normal sequence of the
program counter when a test condition is met. If the test condition is not
met, the branch is not performed. All branch instructions use relative
addressing.
Bit test and branch instructions cause a branch based on the state of any
readable bit in the first 256 memory locations. These 3-byte instructions
Table 12-2. Read-Modify-Write Instructions
Instruction
Mnemonic
Arithmetic shift left
ASL
Arithmetic shift right
ASR
Clear bit in memory
BCLR
Set bit in memory
BSET
Clear
CLR
Complement (one’s complement)
COM
Decrement
DEC
Increment
INC
Logical shift left
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
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For More Information On This Product,
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相关代理商/技术参数
参数描述
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