PIC16HV540 Datasheet, PDF (18/36 Pages) Microchip Technology – Enhanced PIC16C54 EPROM-Based 8-Bit CMOS Microcontroller With On-Chip Voltage Regulator

PIC16HV540
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 = 5, 6 or 7
Operation:
(W) → TRIS register f
Status Affected: None
Encoding:
0000 0000 0fff
Description:
TRIS register 'f' (f = 5, 6, or 7) is loaded
with the contents of the W register
Words:
1
Cycles:
1
Example
TRIS PORTA
Before Instruction
W
= 0XA5
After Instruction
TRISA = 0XA5
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 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
DS40197A-page 18
Preliminary
© 1998 Microchip Technology Inc.