Datasheet

PIC17C4X
DS30412C-page 134  1996 Microchip Technology Inc.
RRNCF Rotate Right f (no carry)
Syntax: [
label ] RRNCF f,d
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
Operation: f<n> → d<n-1>;
f<0> → d<7>
Status Affected: None
Encoding:
0010 000d ffff ffff
Description:
The contents of register 'f' are rotated
one bit to the right. If 'd' is 0 the result is
placed in WREG. If 'd' is 1 the result is
placed back in register 'f'.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register 'f'
Execute Write to
destination
Example 1:
RRNCF REG, 1
Before Instruction
WREG = ?
REG = 1101 0111
After Instruction
WREG = 0
REG = 1110 1011
Example 2:
RRNCF REG, 0
Before Instruction
WREG = ?
REG = 1101 0111
After Instruction
WREG = 1110 1011
REG = 1101 0111
register f
SETF Set f
Syntax: [
label ] SETF f,s
Operands: 0 ≤ f ≤ 255
s ∈ [0,1]
Operation: FFh → f;
FFh → d
Status Affected: None
Encoding:
0010 101s ffff ffff
Description:
If 's' is 0, both the data memory location
'f' and WREG are set to FFh. If 's' is 1
only the data memory location 'f' is set
to FFh.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register 'f'
Execute Write
register 'f'
and other
specified
register
Example1:
SETF REG, 0
Before Instruction
REG = 0xDA
WREG = 0x05
After Instruction
REG = 0xFF
WREG = 0xFF
Example2: SETF REG, 1
Before Instruction
REG = 0xDA
WREG = 0x05
After Instruction
REG = 0xFF
WREG = 0x05