參數(shù)資料
型號(hào): PIC16LC715
廠商: Microchip Technology Inc.
英文描述: 8-Bit CMOS Microcontrollers with A/D Converter
中文描述: 8位CMOS微控制器與A / D轉(zhuǎn)換器
文件頁數(shù): 80/176頁
文件大?。?/td> 803K
代理商: PIC16LC715
PIC16C71X
DS30272A-page 80
1997 Microchip Technology Inc.
RETLW
Syntax:
Operands:
Operation:
Return with Literal in W
[ label RETLW k
0
k
255
k
(W);
TOS
PC
None
Status Affected:
Encoding:
Description:
11
01xx
kkkk
kkkk
The W register is loaded with the eight
bit literal 'k'. The program counter is
loaded from the top of the stack (the
return address). This is a two cycle
instruction.
1
2
Q1
Q2
Words:
Cycles:
Q Cycle Activity:
Q3
Q4
1st Cycle
Decode
Read
literal 'k'
NOP
Write to
W, Pop
from the
Stack
2nd Cycle
NOP
NOP
NOP
NOP
Example
TABLE
CALL TABLE ;W contains table
;offset value
;W now has table value
ADDWF PC ;W = offset
RETLW k1 ;Begin table
RETLW k2 ;
RETLW kn ; End of table
Before Instruction
W
=
After Instruction
W
=
0x07
value of k8
RETURN
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Return from Subroutine
[ label RETURN
None
TOS
PC
None
00
0000
0000
1000
Return from subroutine. The stack is
POPed and the top of the stack (TOS)
is loaded into the program counter.
This is a two cycle instruction.
1
2
Q1
Q2
Words:
Cycles:
Q Cycle Activity:
Q3
Q4
1st Cycle
Decode
NOP
NOP
Pop from
the Stack
2nd Cycle
NOP
NOP
NOP
NOP
Example
RETURN
After Interrupt
PC =
TOS
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