Datasheet

© 2007 Microchip Technology Inc. DS41213D-page 49
PIC16F5X
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 = 0xFF
W = 0x4F
After Instruction
TEMP_REG = 0x4F
W = 0x4F
NOP No Operation
Syntax: [ label ] NOP
Operands: None
Operation: No operation
Status Affected: None
Encoding: 0000 0000 0000
Description: No operation.
Words: 1
Cycles: 1
Example
: NOP
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