
1997 Microchip Technology Inc.
DS30272A-page 77
PIC16C71X
INCFSZ
Increment f, Skip if 0
Syntax:
[
label ]
INCFSZ f,d
Operands:
0
≤ f ≤ 127
d
∈ [0,1]
Operation:
(f) + 1
→ (dest), skip if result = 0
Status Affected:
None
Encoding:
00
1111
dfff
ffff
Description:
The contents of register 'f' are incre-
mented. If 'd' is 0 the result is placed
in the W register. If 'd' is 1 the result is
placed back in register 'f'.
If the result is 1, the next instruction is
executed. If the result is 0, a NOP is
executed instead making it a 2TCY
instruction
.
Words:
1
Cycles:
1(2)
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register
'f'
Process
data
Write to
dest
If Skip:
(2nd Cycle)
Q1
Q2
Q3
Q4
NOP
Example
HERE
INCFSZ
CNT, 1
GOTO
LOOP
CONTINUE
Before Instruction
PC
=
address HERE
After Instruction
CNT
=
CNT + 1
if CNT=
0,
PC
=
address CONTINUE
if CNT
≠
0,
PC
=
address HERE +1
IORLW
Inclusive OR Literal with W
Syntax:
[
label ]
IORLW k
Operands:
0
≤ k ≤ 255
Operation:
(W) .OR. k
→ (W)
Status Affected:
Z
Encoding:
11
1000
kkkk
Description:
The contents of the W register is
OR’ed with the eight bit literal 'k'. The
result is placed in the W register
.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
literal 'k'
Process
data
Write to
W
Example
IORLW
0x35
Before Instruction
W
=
0x9A
After Instruction
W
=
0xBF
Z
=
1