PIC16LC8X-04 View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
PIC16LC8X-04 Datasheet PDF : 117 Pages
| |||
PIC16C8X
SUBLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example 1:
Example 2:
Example 3:
Subtract W from Literal
[ label ] SUBLW k
0 ≤ k ≤ 255
k – (W) → (W)
C, DC, Z
11 110x kkkk kkkk
The W register is subtracted (2’s
complement method) from the
eight bit literal 'k'. The result is
placed in the W register.
1
1
SUBLW 0x02
Before Instruction
W =1
C =?
After Instruction
W =1
C = 1; result is positive
Before Instruction
W =2
C =?
After Instruction
W =0
C = 1; result is zero
Before Instruction
W =3
C =?
After Instruction
W = FF
C = 0; result is negative
SUBWF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example 1:
Example 2:
Example 3:
Subtract W from f
[ label ] SUBWF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) – (W) → (dest)
C, DC, Z
00 0010 dfff ffff
Subtract (2’s complement meth-
odize 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'.
1
1
SUBWF REG1,1
Before Instruction
REG1 = 3
W
=2
C
=?
After Instruction
REG1 = 1
W
=2
C
= 1; result is positive
Before Instruction
REG1 = 2
W
=2
C
=?
After Instruction
REG1 = 0
W
=2
C
= 1; result is zero
Before Instruction
REG1 = 1
W
=2
C
=?
After Instruction
REG1 = FF
W
=2
C
= 0; result is negative
© 1995 Microchip Technology Inc.
DS30081F-page 63
Share Link: 