PIC18F010T-I/SN 查看數據表（PDF） - Microchip Technology
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PIC18F010T-I/SN Datasheet PDF : 176 Pages
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PIC18F010/020
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’ is 1, the Bank will be selected
as per the BSR value.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Decode
Q2
Read
register ’f’
Q3
Process
Data
Q4
Write
register ’f’
Example:
NEGF REG
Before Instruction
REG = 0011 1010 [0x3A]
N
=?
OV
=?
C
=?
DC
=?
Z
=?
After Instruction
REG =
N
=
OV
=
C
=
DC
=
Z
=
1100 0110 [0xC6]
1
0
0
0
0
NOP
No Operation
Syntax:
[ label ] NOP
Operands:
None
Operation:
No operation
Status Affected: None
Encoding:
0000 0000 0000 0000
1111 xxxx xxxx xxxx
Description:
No operation.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Decode
Q2
No
operation
Q3
No
operation
Q4
No
operation
Example:
None.
2001 Microchip Technology Inc.
Preliminary
DS41142A-page 123
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