PIC18LF8720 Microchip Technology, PIC18LF8720 Datasheet - Page 278

• Manufacturer Part Number: PIC18LF8720
• Description: (PIC18LF6620/6520/8520/6620/8620/6720/8720) 64/80-Pin High-Performance / 64-Kbyte Enhanced Flash Microcontrollers
• Manufacturer: Microchip Technology

PIC18F6520/8520/6620/8620/6720/8720
COMF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS39609B-page 276
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 com-
plemented. 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
0x13
0x13
0xEC
f
[0,1]
[0,1]
255
dest
11da
REG, 0, 0
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
PC Address
W
REG
If REG
If REG
No
No
No
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
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: 3 cycles if skip and followed
HERE
NEQUAL
EQUAL
Read
0110
Q2
No
No
No
Q2
Q2
=
=
=
=
=
=
f
[0,1]
 2004 Microchip Technology Inc.
255
by a 2-word instruction.
HERE
?
?
W;
Address (EQUAL)
W;
Address (NEQUAL)
,
then the fetched
CPFSEQ REG, 0
:
:
001a
operation
operation
operation
Process
Data
Q3
No
No
No
Q3
Q3
ffff
f [,a]
operation
operation
operation
operation
No
Q4
No
No
No
Q4
Q4
ffff