PIC16C620 Microchip Technology, PIC16C620 Datasheet - Page 71

• Manufacturer Part Number: PIC16C620
• Description: EPROM-Based 8-Bit CMOS Microcontroller
• Manufacturer: Microchip Technology

SUBLW
Syntax:
Operands:
Operation:
Status
Affected:
Encoding:
Description:
Words:
Cycles:
Example 1:
Example 2:
Example 3:
1998 Microchip Technology Inc.
Subtract W from Literal
[ label ]
0
k - (W)
C, DC, Z
The W register is subtracted (2’s com-
plement method) from the eight bit literal
'k'. The result is placed in the W register.
1
1
SUBLW
Before Instruction
After Instruction
Before Instruction
After Instruction
Before Instruction
After Instruction
11
k
255
W
C
W
C
tive
W
C
W
C
W
C
W
C
tive
SUBLW k
0x02
W)
110x
=
=
=
=
=
=
=
=
=
=
=
=
1
?
1
1; result is posi-
2
?
0
1; result is zero
3
?
0xFF
0; result is nega-
kkkk
kkkk
Preliminary
SUBWF
Syntax:
Operands:
Operation:
Status
Affected:
Encoding:
Description:
Words:
Cycles:
Example 1:
Example 2:
Example 3:
Subtract W from f
[ label ]
0
d
(f) - (W)
C, DC, Z
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'.
1
1
SUBWF
Before Instruction
After Instruction
Before Instruction
After Instruction
Before Instruction
After Instruction
00
f
[0,1]
REG1
W
C
REG1
W
C
REG1
W
C
REG1
W
C
REG1
W
C
REG1
W
C
127
PIC16C62X
SUBWF f,d
REG1,1
dest)
0010
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
DS30235G-page 71
3
2
?
1
2
1; result is positive
2
2
?
0
2
1; result is zero
1
2
?
0xFF
2
0; result is negative
dfff
ffff