Datasheet

© 2007 Microchip Technology Inc. DS39599G-page 291
PIC18F2220/2320/4220/4320
RRNCF Rotate Right f (no carry)
Syntax: [ label ] RRNCF f [,d [,a]]
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (f<n>) → dest<n-1>,
(f<0>) → dest<7>
Status Affected: N, Z
Encoding:
0100 00da ffff ffff
Description: The contents of register ‘f’ are
rotated one bit to the right. If ‘d’ is
‘0’, the result is placed in W. If ‘d’ is
‘1’, the result is placed back in reg-
ister ‘f’ (default). If ‘a’ is ‘0’, the
Access Bank will be selected, over-
riding 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 1:
RRNCF REG, 1, 0
Before Instruction
REG = 1101 0111
After Instruction
REG = 1110 1011
Example 2:
RRNCF REG, W
Before Instruction
W=?
REG = 1101 0111
After Instruction
W=1110 1011
REG = 1101 0111
register f
SETF Set f
Syntax: [ label ] SETF f [,a]
Operands: 0 ≤ f ≤ 255
a ∈ [0,1]
Operation: FFh → f
Status Affected: None
Encoding:
0110 100a ffff ffff
Description: The contents of the specified regis-
ter are set to FFh. If ‘a’ is ‘0’, the
Access Bank will be selected, over-
riding 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
register ‘f’
Example:
SETF REG
Before Instruction
REG = 0x5A
After Instruction
REG = 0xFF