參數(shù)資料
型號： PIC16LCR620AT-04I/SO
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 4 MHz, RISC MICROCONTROLLER, PDSO18
封裝： 0.300 INCH, PLASTIC, MS-013, SO-18
文件頁數(shù)： 101/128頁
文件大小： 3677K
代理商： PIC16LCR620AT-04I/SO
PIC16C62X
DS30235J-page 72
2003 Microchip Technology Inc.
SUBLW
Subtract W from Literal
Syntax:
[ label ]
SUBLW k
Operands:
0
≤ k ≤ 255
Operation:
k - (W)
→ (W)
Status
Affected:
C, DC, Z
Encoding:
11
110x
kkkk
Description:
The W register is subtracted (2’s
complement method) from the eight
bit literal 'k'. The result is placed in
the W register.
Words:
1
Cycles:
1
Example 1:
SUBLW
0x02
Before Instruction
W=
1
C=
?
After Instruction
W=
1
C
=
1; result is positive
Example 2:
Before Instruction
W=
2
C=
?
After Instruction
W=
0
C
=
1; result is zero
Example 3:
Before Instruction
W=
3
C=
?
After Instruction
W=
0xFF
C
=
0; result is negative
SUBWF
Subtract W from f
Syntax:
[ label ]
SUBWF f,d
Operands:
0
≤ f ≤ 127
d
∈ [0,1]
Operation:
(f) - (W)
→ (dest)
Status
Affected:
C, DC, Z
Encoding:
00
0010
dfff
ffff
Description:
Subtract (2’s complement method)
W register from register 'f'. If 'd' is 0,
the result is stored in the W register.
If 'd' is 1, the result is stored back in
register 'f'.
Words:
1
Cycles:
1
Example 1:
SUBWF
REG1,1
Before Instruction
REG1=
3
W=
2
C=
?
After Instruction
REG1=
1
W=
2
C
=
1; result is positive
Example 2:
Before Instruction
REG1=
2
W=
2
C=
?
After Instruction
REG1=
0
W=
2
C
=
1; result is zero
Example 3:
Before Instruction
REG1=
1
W=
2
C=
?
After Instruction
REG1=
0xFF
W=
2
C
=
0; result is negative
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