PIC18F2450 MICROCHIP [Microchip Technology], PIC18F2450 Datasheet - Page 231

• Manufacturer Part Number: PIC18F2450
• Description: 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

CPFSGT
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
© 2006 Microchip Technology Inc.
Q Cycle Activity:
If skip:
If skip and followed by 2-word instruction:
Before Instruction
After Instruction
operation
operation
operation
Decode
PC
W
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
CPFSGT
0
a
(f) – W),
skip if (f) > (W)
(unsigned comparison)
None
Compares the contents of data memory
location ‘f’ to the contents of the W by
performing an unsigned subtraction.
If the contents of ‘f’ are greater than the
contents of WREG, 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 is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f
Section 19.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
1
1(2)
Note: 3 cycles if skip and followed
HERE
NGREATER
GREATER
Read
0110
No
No
No
Q2
Q2
Q2
=
=
=
=
f
[0,1]
255
by a 2-word instruction.
Address (HERE)
?
W;
Address (GREATER)
W;
Address (NGREATER)
f {,a}
010a
operation
operation
operation
CPFSGT REG, 0
:
:
Process
Data
No
No
No
Q3
Q3
Q3
95 (5Fh). See
ffff
Advance Information
operation
operation
operation
operation
No
No
No
No
Q4
Q4
Q4
ffff
CPFSLT
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
W
If REG
PC
If REG
PC
PIC18F2450/4450
Q1
Q1
Q1
register ‘f’
operation
operation
operation
Compare f with W, Skip if f < W
CPFSLT
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 the contents of ‘f’ are less than the
contents of 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 is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
1
1(2)
Note:
HERE
NLESS
LESS
Read
0110
No
No
No
Q2
Q2
Q2
=
=
<
=
=
f
[0,1]
255
3 cycles if skip and followed
by a 2-word instruction.
Address (HERE)
?
W;
Address (LESS)
W;
Address (NLESS)
CPFSLT REG, 1
:
:
f {,a}
000a
operation
operation
operation
Process
Data
No
No
No
Q3
Q3
Q3
DS39760A-page 229
ffff
operation
operation
operation
operation
No
No
No
No
Q4
Q4
Q4
ffff