Datasheet
1999-2012 Microchip Technology Inc. DS40192D-page 47
PIC16C505
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