PIC16C505T-04SL View Datasheet(PDF) - Microchip Technology
Part Name
Description
MFG CO.
'PIC16C505T-04SL' PDF : 85 Pages View PDF
MOVWF
Move W to f
Syntax:
[ label ] MOVWF f
Operands:
0 ≤ f ≤ 31
Operation:
(W) → (f)
Status Affected: None
Encoding:
0000 001f ffff
Description:
Move data from the W register to
register ’f’.
Words:
1
Cycles:
1
Example:
MOVWF TEMP_REG
Before Instruction
TEMP_REG =
W
=
0xFF
0x4F
After Instruction
TEMP_REG =
W
=
0x4F
0x4F
NOP
No Operation
Syntax:
[ label ] NOP
Operands:
None
Operation:
No operation
Status Affected: None
Encoding:
0000 0000
Description:
No operation.
Words:
1
Cycles:
1
Example:
NOP
0000
PIC16C505
OPTION
Load OPTION Register
Syntax:
[ label ] OPTION
Operands:
None
Operation:
(W) → OPTION
Status Affected: None
Encoding:
0000 0000 0010
Description:
The content of the W register is
loaded into the OPTION register.
Words:
1
Cycles:
1
Example
OPTION
Before Instruction
W
= 0x07
After Instruction
OPTION = 0x07
RETLW
Return with Literal in W
Syntax:
[ label ] RETLW k
Operands:
0 ≤ k ≤ 255
Operation:
k → (W);
TOS → PC
Status Affected: None
Encoding:
1000 kkkk kkkk
Description:
The W register is loaded with the
eight bit literal ’k’. The program
counter is loaded from the top of
the stack (the return address).
This is a two cycle instruction.
Words:
1
Cycles:
2
Example:
TABLE
CALL TABLE ;W contains
;table offset
;value.
•
;W now has table
•
;value.
•
ADDWF PC ;W = offset
RETLW k1 ;Begin table
RETLW k2 ;
•
•
•
RETLW kn ; End of table
Before Instruction
W = 0x07
After Instruction
W = value of k8
© 1999 Microchip Technology Inc.
DS40192C-page 47
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