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