Datasheet

© 2007 Microchip Technology Inc. DS39599G-page 295
PIC18F2220/2320/4220/4320
SWAPF Swap f
Syntax: [ label ] SWAPF f [,d [,a]]
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (f<3:0>) → dest<7:4>,
(f<7:4>) → dest<3:0>
Status Affected: None
Encoding:
0011 10da ffff ffff
Description: The upper and lower nibbles of reg-
ister ‘f’ are exchanged. If ‘d’ is ‘0’,
the result is placed in W. If ‘d’ is ‘1’,
the result is placed in register ‘f’
(default). If ‘a’ is ‘0’, the Access
Bank will be selected, overriding
the BSR value. If ‘a’ is ‘1’, then the
bank will be selected as per the
BSR value (default).
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example:
SWAPF REG
Before Instruction
REG = 0x53
After Instruction
REG = 0x35