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| 型號(hào)： | S3C1850XX-SM |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO24 |
| 封裝： | 0.375 INCH, SOP-24 |
| 文件頁(yè)數(shù)： | 28/89頁(yè) |
| 文件大?。?/td> | 323K |
| 代理商： | S3C1850XX-SM |
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INSTRUCTION SET
S3C1840/C1850/C1860/P1860
5-12
JP
dst
Binary Code:
1 0 d d
d d d d
Description:
The JP transfers program control to the destination address if the SF is one.
The conditional jump replaces the contents of the program counter with the address
indicated and transfers control to that location.
Had the SF flag not been set, control would have proceeded with the next instruction.
Operation:
If SF = 1 ; PC
← (W), PA ← PB
Flags:
SF : Set to one
SL : Unaffected
Example:
JP
SUTIN1
; This instruction will cause program execution to branch to the
instruction at label SUTIN; SUTIN1 must be within the current
page
CALL
dst
Binary Code:
1 1 d d
d d d d
Description:
If the SF flag is set to 1, this instruction calls a subroutine located at the indicated address,
and then pushes the current contents of the program counter to the top of the stack. The
program counter value used is the address of the first instruction following the CALL ins.
The specified destination address is then loaded into the program counter and points to the
first instruction of a procedure. At the end of the procedure, the return (RET) instruction
can be used to return to the original program flow.
Operation:
If SF = 1 ; SRi
← PC + 1, PSRi ← PA
PC
← I (W), PA ← PB
Flags:
SF : Set to one
SL : Unaffected
Example:
CALL
ACD1
; CALL subroutine located at the label ACD1 where ACD1
must be within the current page
RET
Binary Code:
0 0 0 0
1 1 1 1
Description:
This instruction is normally used to return to the previously executing procedure at the end
of a procedure entered by a CALL instruction. The contents of the location addressed by
the stack pointer are popped into the program counter. The next statement executed is that
addressed by the new contents of the program counter.
Operation:
PC
← Sri, PB ← PSRi
PA
← PB
Flags:
SF : Set to one
SL : Unaffected
Example:
RET
; Return from subroutine
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相關(guān)代理商/技術(shù)參數(shù) |
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