Datasheet

PIC18F1220/1320
DS39605F-page 216 © 2007 Microchip Technology Inc.
MOVFF Move f to f
Syntax: [ label ] MOVFF f
s
,f
d
Operands: 0 ≤ f
s
≤ 4095
0 ≤ f
d
≤ 4095
Operation: (f
s
) → f
d
Status Affected: None
Encoding:
1st word (source)
2nd word (destin.)
1100
1111
ffff
ffff
ffff
ffff
ffff
s
ffff
d
Description: The contents of source register ‘f
s
’
are moved to destination register
‘f
d
’. Location of source ‘f
s
’ can be
anywhere in the 4096-byte data
space (000h to FFFh) and location
of destination ‘f
d
’ can also be
anywhere from 000h to FFFh.
Either source or destination can be
W (a useful special situation).
MOVFF is particularly useful for
transferring a data memory location
to a peripheral register (such as the
transmit buffer or an I/O port).
The MOVFF instruction cannot use
the PCL, TOSU, TOSH or TOSL as
the destination register.
The MOVFF instruction should not
be used to modify interrupt settings
while any interrupt is enabled (see
page 73).
Words: 2
Cycles: 2 (3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
(src)
Process
Data
No
operation
Decode No
operation
No dummy
read
No
operation
Write
register ‘f’
(dest)
Example:
MOVFF REG1, REG2
Before Instruction
REG1 = 0x33
REG2 = 0x11
After Instruction
REG1 = 0x33,
REG2 = 0x33
MOVLB Move literal to low nibble in BSR
Syntax: [ label ] MOVLB k
Operands: 0 ≤ k ≤ 255
Operation: k → BSR
Status Affected: None
Encoding:
0000 0001 kkkk kkkk
Description: The 8-bit literal ‘k’ is loaded into
the Bank Select Register (BSR).
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read literal
‘k’
Process
Data
Write
literal ‘k’ to
BSR
Example:
MOVLB 5
Before Instruction
BSR register = 0x02
After Instruction
BSR register = 0x05