
1996 Microchip Technology Inc.
DS30412C-page 113
PIC17C4X
ADDWFC
ADD WREG and Carry bit to f
Syntax:
[
label ] ADDWFC
f,d
Operands:
0
≤ f ≤ 255
d
∈ [0,1]
Operation:
(WREG) + (f) + C
→ (dest)
Status Affected:
OV, C, DC, Z
Encoding:
0001
000d
ffff
Description:
Add WREG, the Carry Flag and data
memory location 'f'. If 'd' is 0, the result is
placed in WREG. If 'd' is 1, the result is
placed in data memory location 'f'.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register 'f'
Execute
Write to
destination
Example:
ADDWFC
REG
0
Before Instruction
Carry bit =
1
REG
=
0x02
WREG
=
0x4D
After Instruction
Carry bit =
0
REG
=
0x02
WREG
=
0x50
ANDLW
And Literal with WREG
Syntax:
[
label ] ANDLW
k
Operands:
0
≤ k ≤ 255
Operation:
(WREG) .AND. (k)
→ (WREG)
Status Affected:
Z
Encoding:
1011
0101
kkkk
Description:
The contents of WREG are AND’ed with
the 8-bit literal 'k'. The result is placed in
WREG.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read literal
'k'
Execute
Write to
WREG
Example:
ANDLW
0x5F
Before Instruction
WREG
=
0xA3
After Instruction
WREG
=
0x03