PIC16F628-20P Datasheet, PDF (111/170 Pages) Microchip Technology – FLASH-Based 8-Bit CMOS Microcontroller

15.1 Instruction Descriptions
ADDLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Add Literal and W
[ label ] ADDLW k
0 ≤ k ≤ 255
(W) + k → (W)
C, DC, Z
11
111x kkkk kkkk
The contents of the W register
are added to the eight bit literal
'k' and the result is placed in the
W register.
1
1
ADDLW 0x15
Before Instruction
W = 0x10
After Instruction
W = 0x25
ADDWF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Add W and f
[ label ] ADDWF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(W) + (f) → (dest)
C, DC, Z
00
0111 dfff ffff
Add the contents of the W regis-
ter with register 'f'. If 'd' is 0 the
result is stored in the W register.
If 'd' is 1 the result is stored back
in register 'f'.
1
1
ADDWF REG1, 0
Before Instruction
W = 0x17
REG1 = 0xC2
After Instruction
W = 0xD9
REG1 = 0xC2
Z =0
C =0
DC = 0
PIC16F62X
ANDLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
AND Literal with W
[ label ] ANDLW k
0 ≤ k ≤ 255
(W) .AND. (k) → (W)
Z
11
1001 kkkk kkkk
The contents of W register are
AND’ed with the eight bit literal
'k'. The result is placed in the W
register.
1
1
ANDLW 0x5F
Before Instruction
W = 0xA3
After Instruction
W = 0x03
ANDWF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
AND W with f
[ label ] ANDWF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(W) .AND. (f) → (dest)
Z
00
0101 dfff ffff
AND the W register with register
'f'. If 'd' is 0 the result is stored in
the W register. If 'd' is 1 the
result is stored back in register
'f'.
1
1
ANDWF REG1, 1
Before Instruction
W = 0x17
REG1 = 0xC2
After Instruction
W = 0x17
REG1 = 0x02
 2003 Microchip Technology Inc.
Preliminary
DS40300C-page 109