PIC16F627A_05 Datasheet, PDF (125/180 Pages) Microchip Technology – Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F627A/628A/648A
IORLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Inclusive OR Literal with W
[ label ] IORLW k
0 ≤ k ≤ 255
(W) .OR. k → (W)
Z
11
1000 kkkk kkkk
The contents of the W register is
OR’ed with the eight-bit literal
‘k’. The result is placed in the W
register.
1
1
IORLW 0x35
Before Instruction
W = 0x9A
After Instruction
W = 0xBF
Z =0
IORWF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Inclusive OR W with f
[ label ] IORWF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(W) .OR. (f) → (dest)
Z
00
0100 dfff ffff
Inclusive OR the W register with
register ‘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’.
1
1
IORWF REG1, 0
Before Instruction
REG1 = 0x13
W = 0x91
After Instruction
REG1 = 0x13
W = 0x93
Z
=1
MOVLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Move Literal to W
[ label ] MOVLW k
0 ≤ k ≤ 255
k → (W)
None
11
00xx kkkk kkkk
The eight bit literal ‘k’ is loaded
into W register. The “don’t
cares” will assemble as ‘0’s.
1
1
MOVLW 0x5A
After Instruction
W = 0x5A
MOVF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Move f
[ label ] MOVF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) → (dest)
Z
00
1000 dfff ffff
The contents of register ‘f’ is
moved to a destination
dependent upon the status of
‘d’. If d = 0, destination is W
register. 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.
1
1
MOVF REG1, 0
After Instruction
W= value in REG1 register
Z= 1
© 2005 Microchip Technology Inc.
DS40044D-page 123