PIC18F2220 MICROCHIP [Microchip Technology], PIC18F2220 Datasheet - Page 274
![no-image](/images/no-image-200.jpg)
PIC18F2220
Manufacturer Part Number
PIC18F2220
Description
28/40/44-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F2220.pdf
(388 pages)
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PIC18F2220/2320/4220/4320
COMF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS39599C-page 272
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
0x13
0x13
0xEC
f
[0,1]
[0,1]
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
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
tion is discarded and a NOP is
executed instead, making this 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
NEQUAL
EQUAL
Read
0110
Q2
No
No
No
Q2
Q2
=
=
=
=
=
=
f
[0,1]
2003 Microchip Technology Inc.
255
by a 2-word instruction.
HERE
?
?
W;
Address (EQUAL)
W;
Address (NEQUAL)
,
then the fetched instruc-
CPFSEQ REG
:
:
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
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