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PIC18F242 Fiches technique(PDF) 241 Page - Microchip Technology

No de pièce PIC18F242
Description  High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D
PDF  332 Pages
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Fabricant  MICROCHIP [Microchip Technology]
Site Internet  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F242 Fiches technique(HTML) 241 Page - Microchip Technology

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© 2006 Microchip Technology Inc.
DS39564C-page 239
PIC18FXX2
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.



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