參數(shù)資料
型號： MC68HC705J2S
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： HCMOS MICROCONTROLLER UNIT
中文描述： 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER, CDIP20
封裝： WINDOWED, CERDIP-20
文件頁數(shù)： 59/82頁
文件大?。?/td> 327K
代理商： MC68HC705J2S
MC68HC705J2
Rev. 2
INSTRUCTION SET
MOTOROLA
10-7
1
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10.2.4 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 10-4
lists these instructions.
10.2.5 Control Instructions
These register reference instructions control CPU operation during program
execution. Control instructions, listed in
Table 10-5
, use inherent addressing.
Table 10-4. Bit Manipulation Instructions
Instruction
Mnemonic
Clear Bit
BCLR
Branch if Bit Clear
BRCLR
Branch if Bit Set
BRSET
Set Bit
BSET
Table 10-5. 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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