Datasheet

 2010 Microchip Technology Inc. DS39616D-page 311
PIC18F2331/2431/4331/4431
NEGF Negate f
Syntax: [ label ] NEGF f [,a]
Operands: 0  f  255
a  [0,1]
Operation: ( f
) + 1  f
Status Affected: N, OV, C, DC, Z
Encoding: 0110 110a ffff ffff
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.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write
register ‘f’
Example:
NEGF REG, 1
Before Instruction
REG = 0011 1010 [0x3A]
After Instruction
REG = 1100 0110 [0xC6]
NOP No Operation
Syntax: [ label ] NOP
Operands: None
Operation: No operation
Status Affected: None
Encoding: 0000
1111
0000
xxxx
0000
xxxx
0000
xxxx
Description: No operation.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
No
operation
Example:
None.