PIC18F23K20 MICROCHIP [Microchip Technology], PIC18F23K20 Datasheet - Page 358
PIC18F23K20
Manufacturer Part Number
PIC18F23K20
Description
28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F23K20.pdf
(456 pages)
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Part Number:
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PIC18F2XK20/4XK20
24.2.2
ADDFSR
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS41303G-page 358
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’
Add Literal to FSR
ADDFSR f, k
0 k 63
f [ 0, 1, 2 ]
FSR(f) + k FSR(f)
None
The 6-bit literal ‘k’ is added to the
contents of the FSR specified by ‘f’.
1
1
Read
1110
Q2
03FFh
0422h
1000
Process
Data
Q3
ffkk
Write to
FSR
kkkk
Q4
ADDULNK
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
Before Instruction
After Instruction
Operation
Decode
FSR2
PC
FSR2
PC
Q1
No
=
=
=
=
Operation
ADDULNK 23h
literal ‘k’
Add Literal to FSR2 and Return
ADDULNK k
0 k 63
FSR2 + k FSR2,
(TOS) PC
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
Read
1110
Q2
No
03FFh
0100h
0422h
(TOS)
2010 Microchip Technology Inc.
1000
Operation
Process
Data
Q3
No
11kk
Operation
Write to
FSR
kkkk
Q4
No
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