PIC18F2480/2580/4480/4580
MOVFF
Move f to f
MOVLB
Move Literal to Low Nibble in BSR
Syntax:
MOVFF f ,f
Syntax:
MOVLW k
s
d
Operands:
0 ≤ f ≤ 4095
Operands:
Operation:
Status Affected:
Encoding:
Description:
0 ≤ k ≤ 255
k → BSR
None
s
0 ≤ f ≤ 4095
d
Operation:
(f ) → f
s
d
Status Affected:
None
0000
0001
kkkk
kkkk
Encoding:
The eight-bit literal ‘k’ is loaded into the
Bank Select Register (BSR). The value
of BSR<7:4> always remains ‘0’,
1st word (source)
2nd word (destin.)
1100
1111
ffff
ffff
ffff
ffff
ffffs
ffffd
regardless of the value of k :k .
7
4
Description:
The contents of source register ‘f ’ are
s
moved to destination register ‘f ’.
Words:
Cycles:
1
1
d
Location of source ‘f ’ can be anywhere
s
in the 4096-byte data space (000h to
Q Cycle Activity:
Q1
FFFh) and location of destination ‘f ’
can also be anywhere from 000h to
FFFh.
d
Q2
Q3
Q4
Decode
Read
literal ‘k’
Process
Data
Write literal
‘k’ to BSR
Either source or destination can be W
(a useful special situation).
MOVFFis particularly useful for
transferring a data memory location to a
peripheral register (such as the transmit
buffer or an I/O port).
Example:
MOVLB
5
Before Instruction
BSR Register =
After Instruction
BSR Register =
02h
05h
The MOVFFinstruction cannot use the
PCL, TOSU, TOSH or TOSL as the
destination register.
Words:
Cycles:
2
2 (3)
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register ‘f’
(src)
Process
Data
No
operation
Decode
No
operation
No
operation
Write
register ‘f’
(dest)
No dummy
read
Example:
MOVFF
REG1, REG2
Before Instruction
REG1
REG2
=
=
33h
11h
After Instruction
REG1
REG2
=
=
33h
33h
DS39637D-page 392
© 2009 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
