1999 Microchip Technology Inc.
DS40139E-page 57
PIC12C5XX
SWAPF
Swap Nibbles in f
Syntax:
[
label ] SWAPF f,d
Operands:
0
≤ f ≤ 31
d
∈ [0,1]
Operation:
(f<3:0>)
→ (dest<7:4>);
(f<7:4>)
→ (dest<3:0>)
Status Affected:
None
Encoding:
0011
10df
ffff
Description:
The upper and lower nibbles of register
’f’ are exchanged. If ’d’ is 0 the result is
placed in W register. If ’d’ is 1 the result
is placed in register ’f’.
Words:
1
Cycles:
1
Example
SWAPF
REG1,
0
Before Instruction
REG1
=
0xA5
After Instruction
REG1
=
0xA5
W
=
0X5A
TRIS
Load TRIS Register
Syntax:
[
label ] TRIS
f
Operands:
f = 6
Operation:
(W)
→ TRIS register f
Status Affected:
None
Encoding:
0000
0fff
Description:
TRIS register ’f’ (f = 6) is loaded with the
contents of the W register
Words:
1
Cycles:
1
Example
TRIS
GPIO
Before Instruction
W=
0XA5
After Instruction
TRIS
=
0XA5
Note:
f = 6 for PIC12C5XX only.
XORLW
Exclusive OR literal with W
Syntax:
[
label]XORLW k
Operands:
0
≤ k ≤ 255
Operation:
(W) .XOR. k
→ (W)
Status Affected:
Z
Encoding:
1111
kkkk
Description:
The contents of the W register are
XOR’ed with the eight bit literal 'k'. The
result is placed in the W register.
Words:
1
Cycles:
1
Example:
XORLW
0xAF
Before Instruction
W=
0xB5
After Instruction
W
=
0x1A
XORWF
Exclusive OR W with f
Syntax:
[
label ] XORWF
f,d
Operands:
0
≤ f ≤ 31
d
∈ [0,1]
Operation:
(W) .XOR. (f)
→ (dest)
Status Affected:
Z
Encoding:
0001
10df
ffff
Description:
Exclusive OR the contents of 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'.
Words:
1
Cycles:
1
Example
XORWF
REG,1
Before Instruction
REG
=
0xAF
W=
0xB5
After Instruction
REG
=
0x1A
W=
0xB5