PIC18F4431-I/P Microchip Technology Inc., PIC18F4431-I/P Datasheet - Page 306
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PIC18F4431-I/P
Manufacturer Part Number
PIC18F4431-I/P
Description
Microcontroller; 16 KB Flash; 768 RAM; 256 EEPROM; 36 I/O; 40-Pin-PDIP
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F4431-IP.pdf
(396 pages)
Specifications of PIC18F4431-I/P
A/d Inputs
9-Channel, 10-Bit
Cpu Speed
10 MIPS
Eeprom Memory
256 Bytes
Input Output
36
Interface
I2C/SPI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
40-pin PDIP
Programmable Memory
16K Bytes
Ram Size
768 Bytes
Speed
40 MHz
Timers
1-8-bit, 3-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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PIC18F2331/2431/4331/4431
COMF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS39616B-page 304
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, W
Process
Data
Q3
f [,d [,a]]
ffff
destination
Write to
Q4
ffff
Preliminary
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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