PIC18F1230 MICROCHIP [Microchip Technology], PIC18F1230 Datasheet - Page 252
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PIC18F1230
Manufacturer Part Number
PIC18F1230
Description
18/20/28-Pin, Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F1230.pdf
(312 pages)
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PIC18F1230/1330
21.2.2
ADDFSR
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS39758B-page 250
Q Cycle Activity:
Note:
Before Instruction
After Instruction
Decode
FSR2
FSR2
Q1
EXTENDED INSTRUCTION SET
All PIC18 instructions may take an optional label argument preceding the instruction mnemonic for use in
symbolic addressing. If a label is used, the instruction syntax then becomes: {label} instruction argument(s).
=
=
ADDFSR 2, 23h
literal ‘k’
0
f
FSR(f) + k
None
The 6-bit literal ‘k’ is added to the
contents of the FSR specified by ‘f’.
1
1
Add Literal to FSR
ADDFSR f, k
Read
1110
Q2
03FFh
0422h
[ 0, 1, 2 ]
k
63
1000
Process
FSR(f)
Data
Q3
ffkk
Advance Information
Write to
FSR
kkkk
Q4
ADDULNK
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example:
Before Instruction
After Instruction
Operation
Decode
Q1
No
FSR2
PC
FSR2
PC
Add Literal to FSR2 and Return
ADDULNK k
0
FSR2 + k
(TOS)
None
The 6-bit literal ‘k’ is added to the
contents of FSR2. A RETURN is then
executed by loading the PC with the
TOS.
The instruction takes two cycles to
execute; a NOP is performed during the
second cycle.
This may be thought of as a special
case of the ADDFSR instruction, where
f = 3 (binary ‘11’); it operates only on
FSR2.
1
2
1110
=
=
=
=
Operation
ADDULNK 23h
literal ‘k’
k
Read
Q2
No
03FFh
0100h
0422h
(TOS)
63
© 2006 Microchip Technology Inc.
1000
PC
FSR2,
Operation
Process
11kk
Data
Q3
No
Operation
Write to
kkkk
FSR
Q4
No
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