Datasheet

PIC16C71X
DS30272A-page 78  1997 Microchip Technology Inc.
IORWF Inclusive OR W with f
Syntax: [
label ] IORWF f,d
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
Operation: (W) .OR. (f) → (dest)
Status Affected: Z
Encoding:
00 0100 dfff ffff
Description:
Inclusive OR the W register with regis-
ter 'f'. If 'd' is 0 the result is placed in
the W register. If 'd' is 1 the result is
placed back in register 'f'.
Words: 1
Cycles: 1
Q Cycle Activity: Q1 Q2 Q3 Q4
Decode Read
register
'f'
Process
data
Write to
dest
Example
IORWF RESULT, 0
Before Instruction
RESULT = 0x13
W = 0x91
After Instruction
RESULT = 0x13
W = 0x93
Z = 1
MOVF Move f
Syntax: [
label ] MOVF f,d
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
Operation: (f) → (dest)
Status Affected: Z
Encoding:
00 1000 dfff ffff
Description:
The contents of register f is moved to
a destination dependant upon the sta-
tus of d. If d = 0, destination is W reg-
ister. If d = 1, the destination is file
register f itself. d = 1 is useful to test a
file register since status flag Z is
affected.
Words: 1
Cycles: 1
Q Cycle Activity: Q1 Q2 Q3 Q4
Decode Read
register
'f'
Process
data
Write to
dest
Example
MOVF FSR, 0
After Instruction
W = value in FSR register
Z = 1
MOVLW Move Literal to W
Syntax: [
label ] MOVLW k
Operands: 0 ≤ k ≤ 255
Operation: k → (W)
Status Affected: None
Encoding:
11 00xx kkkk kkkk
Description:
The eight bit literal 'k' is loaded into W
register
. The don’t cares will assemble
as 0’s.
Words: 1
Cycles: 1
Q Cycle Activity: Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
Write to
W
Example
MOVLW 0x5A
After Instruction
W = 0x5A
MOVWF Move W to f
Syntax: [
label ] MOVWF f
Operands: 0 ≤ f ≤ 127
Operation: (W) → (f)
Status Affected: None
Encoding:
00 0000 1fff ffff
Description:
Move data from W register to register
'f'
.
Words: 1
Cycles: 1
Q Cycle Activity: Q1 Q2 Q3 Q4
Decode Read
register
'f'
Process
data
Write
register 'f'
Example
MOVWF OPTION_REG
Before Instruction
OPTION = 0xFF
W = 0x4F
After Instruction
OPTION = 0x4F
W = 0x4F