参数资料
型号: MC68HC805P18MP
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: 18/144页
文件大小: 1292K
代理商: MC68HC805P18MP
Advance Information
MC68HC(8)05P18 — Rev. 2.0
114
Instruction Set
MOTOROLA
Instruction Set
12.4.4 Bit Manipulation Instructions
The CPU can set or clear any writable bit in the first 256 bytes of
memory. Port registers, port data direction registers, timer registers, and
on-chip RAM locations are in the first 256 bytes of memory. The CPU
can also test and branch based on the state of any bit in any of the first
256 memory locations. Bit manipulation instructions use direct
addressing. Table 12-4 lists these instructions.
12.4.5 Control Instructions
These register reference instructions control CPU operation during
program execution. Control instructions, listed in Table 12-5, use
inherent addressing.
Table 12-4. Bit Manipulation Instructions
Instruction
Mnemonic
Clear bit
BCLR
Branch if bit clear
BRCLR
Branch if bit set
BRSET
Set bit
BSET
Table 12-5. Control Instructions
Instruction
Mnemonic
Clear carry bit
CLC
Clear interrupt mask
CLI
No operation
NOP
Reset stack pointer
RSP
Return from interrupt
RTI
Return from subroutine
RTS
Set carry bit
SEC
Set interrupt mask
SEI
Stop oscillator and enable IRQ pin
STOP
Software interrupt
SWI
Transfer accumulator to index register
TAX
Transfer index register to accumulator
TXA
Stop CPU clock and enable interrupts
WAIT
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For More Information On This Product,
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