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| 型號： | 68HC705PL4B |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 中文描述： | 8位微控制器單元（MCU）。（8位微控制器） |
| 文件頁數(shù)： | 75/98頁 |
| 文件大小： | 1019K |
| 代理商： | 68HC705PL4B |
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April 30, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05PL4
REV 2.0
INSTRUCTION SET
MOTOROLA
12-7
12.1.13 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.
12.1.14 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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