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參數(shù)資料
| 型號： | MC68HC05P4ADWE |
| 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, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 44/72頁 |
| 文件大?。?/td> | 400K |
| 代理商： | MC68HC05P4ADWE |
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Instruction Types
MC68HC05P4A Data Sheet, Rev. 7.1
Freescale Semiconductor
49
11.3.3 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 use a combination of direct addressing and relative
addressing. The direct address of the byte to be tested is in the byte following the opcode. The third byte
is the signed offset byte. The CPU finds the conditional branch destination by adding the third byte to the
program counter if the specified bit tests true. The bit to be tested and its condition (set or clear) is part of
the opcode. The span of branching is from –128 to +127 from the address of the next location after the
branch instruction. The CPU also transfers the tested bit to the carry/borrow bit of the condition code
register. Table 11-3 lists the jump and branch instructions.
Table 11-3. Jump and Branch Instructions
Instruction
Mnemonic
Branch if carry bit clear
BCC
Branch if carry bit set
BCS
Branch if equal
BEQ
Branch if half-carry bit clear
BHCC
Branch if half-carry bit set
BHCS
Branch if higher
BHI
Branch if higher or same
BHS
Branch if IRQ pin high
BIH
Branch if IRQ pin low
BIL
Branch if lower
BLO
Branch if lower or same
BLS
Branch if interrupt mask clear
BMC
Branch if minus
BMI
Branch if interrupt mask set
BMS
Branch if not equal
BNE
Branch if plus
BPL
Branch always
BRA
Branch if bit clear
BRCLR
Branch never
BRN
Branch if bit set
BRSET
Branch to subroutine
BSR
Unconditional jump
JMP
Jump to subroutine
JSR
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC05P4APE | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28 |
| MC68HC05P4ADW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| MC68HC05P6VS | 8-BIT, 2.1 MHz, MICROCONTROLLER, CDIP28 |
| MC68HC05P6CS | 8-BIT, 2.1 MHz, MICROCONTROLLER, CDIP28 |
| MC68HC05P6VP | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05P4DW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P4P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P6 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P6_1 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P8 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
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