PIC18F2220/2320/4220/4320
NEGF
Negate f
NOP
No Operation
Syntax:
[ label ] NEGF f [,a]
Syntax:
[ label ] NOP
None
Operands:
0 ≤ f ≤ 255
a ∈ [0,1]
Operands:
Operation:
Status Affected:
Encoding:
No operation
None
Operation:
( f ) + 1 → f
Status Affected:
Encoding:
N, OV, C, DC, Z
0000
1111
0000
xxxx
0000
xxxx
0000
xxxx
0110
110a
ffff
ffff
Description:
Words:
No operation.
Description:
Location ‘f’ is negated using two’s
complement. The result is placed in
the data memory location ‘f’. 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.
1
1
Cycles:
Q Cycle Activity:
Q1
Q2
No
Q3
No
Q4
Decode
No
operation
operation
operation
Words:
Cycles:
1
1
Example:
None.
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register ‘f’
Process
Data
Write
register ‘f’
NEGF
REG, 1
Example:
Before Instruction
REG
=
0011 1010 [0x3A]
1100 0110 [0xC6]
After Instruction
REG
=
2003 Microchip Technology Inc.
DS39599C-page 283
MICROCHIP [ MICROCHIP ]
