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PIC17C44-08/P Datasheet(PDF) 134 Page - Microchip Technology

Part # PIC17C44-08/P
Description  High-Performance 8-Bit CMOS EPROM/ROM Microcontroller
PDF  240 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC17C44-08/P Datasheet(HTML) 134 Page - Microchip Technology

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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



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