PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 301
PIC18F258
Manufacturer Part Number
PIC18F258
Description
High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F258.pdf
(384 pages)
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INCFSZ
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
If skip:
If skip and followed by 2-word instruction:
2002 Microchip Technology Inc.
Before Instruction
After Instruction
operation
operation
operation
Decode
No
No
No
PC
CNT
If CNT
PC
If CNT
PC
Q1
Q1
Q1
=
=
=
=
=
register ’f’
operation
operation
operation
Increment f, skip if 0
[ label ]
0
d
a
(f) + 1
skip if result = 0
None
The contents of register ’f’ are
incremented. If ’d’ is 0, the result is
placed in W. If ’d’ is 1, the result is
placed back in register ’f’ (default).
If the result is 0, the next instruc-
tion, which is already fetched, is
discarded, and a NOP is executed
instead, making it a two-cycle
instruction. If ’a’ is 0, the Access
Bank will be selected, overriding
the BSR value. If ’a’ = 1, then the
bank will be selected as per the
BSR value (default).
1
1(2)
Note: 3 cycles if skip and followed
HERE
NZERO
ZERO
Read
0011
No
No
No
Q2
Q2
Q2
Address (HERE)
CNT + 1
0;
Address (ZERO)
0;
Address (NZERO)
f
[0,1]
[0,1]
by a 2-word instruction.
255
dest,
INCFSZ
:
:
INCFSZ
11da
operation
operation
operation
Process
Data
No
No
No
Q3
Q3
Q3
ffff
f [,d [,a]]
CNT
destination
operation
operation
operation
Write to
No
No
No
Q4
Q4
Q4
ffff
INFSNZ
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
If skip:
If skip and followed by 2-word instruction:
Before Instruction
After Instruction
operation
operation
operation
Decode
PC
REG
If REG
PC
If REG
PC
No
No
No
Q1
Q1
Q1
=
=
=
=
=
register ’f’
operation
operation
operation
Increment f, skip if not 0
[ label ]
0
d
a
(f) + 1
skip if result
None
The contents of register 'f' are
incremented. If 'd' is 0, the result is
placed in W. If 'd' is 1, the result is
placed back in register 'f' (default).
If the result is not 0, the next
instruction, which is already
fetched, is discarded, and a NOP is
executed instead, making it a
two-cycle instruction. If ’a’ is 0, the
Access Bank will be selected, over-
riding the BSR value. If ’a’ = 1, then
the bank will be selected as per the
BSR value (default).
1
1(2)
Note: 3 cycles if skip and followed
HERE
ZERO
NZERO
Read
0100
No
No
No
Q2
Q2
Q2
Address (HERE)
REG + 1
0;
Address (NZERO)
0;
Address (ZERO)
f
[0,1]
[0,1]
PIC18FXX8
255
by a 2-word instruction.
dest,
INFSNZ
INFSNZ
10da
operation
operation
operation
Process
Data
0
No
No
No
Q3
Q3
Q3
DS41159B-page 299
REG
ffff
f [,d [,a]]
destination
operation
operation
operation
Write to
No
No
No
Q4
Q4
Q4
ffff
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