PIC18F24 MICROCHIP [Microchip Technology], PIC18F24 Datasheet - Page 300

• Manufacturer Part Number: PIC18F24
• Description: 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
• Manufacturer: MICROCHIP [Microchip Technology]

COMF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS41159D-page 298
PIC18FXX8
Q Cycle Activity:
Before Instruction
After Instruction
Decode
REG
REG
W
Q1
=
=
=
register ‘f’
Complement f
[ label ] COMF
0
d
a
N, Z
The contents of register ‘f’ are
complemented. If ‘d’ is ‘0’, the result is
stored in W. If ‘d’ is ‘1’, the result is
stored back in register ‘f’ (default). 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
COMF
( f )
Read
0001
Q2
f
[0,1]
[0,1]
0x13
0x13
0xEC
255
dest
11da
REG, W
Process
Data
Q3
f [,d [,a]]
ffff
destination
Write to
Q4
ffff
CPFSEQ
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
No
No
No
PC Address
W
REG
If REG
If REG
Q1
Q1
Q1
PC
PC
register ‘f’
operation
operation
operation
Compare f with W, Skip if f = W
[ label ] CPFSEQ
0
a
(f) – (W),
skip if (f) = (W)
(unsigned comparison)
None
Compares the contents of data memory
location ‘f’ to the contents of W by
performing an unsigned subtraction.
If ‘f’ = W, then the fetched instruction is
discarded and a NOP is executed
instead, making this 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:
HERE
NEQUAL
EQUAL
Read
0110
No
No
No
Q2
Q2
Q2
f
[0,1]
=
=
=
=
=
=
 2004 Microchip Technology Inc.
255
3 cycles if skip and followed
by a 2-word instruction.
HERE
?
?
W;
Address (EQUAL)
W;
Address (NEQUAL)
001a
CPFSEQ REG
:
:
operation
operation
operation
Process
Data
No
No
No
Q3
Q3
Q3
f [,a]
ffff
operation
operation
operation
operation
No
No
No
No
Q4
Q4
Q4
ffff