PIC16F54T-I/SO View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
PIC16F54T-I/SO Datasheet PDF : 88 Pages
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PIC16F5X
SUBWF
Subtract W from f
Syntax:
[ label ] SUBWF f, d
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operation:
(f) – (W) → (dest)
Status Affected: C, DC, Z
Encoding:
0000 10df ffff
Description:
Subtract (2’s complement method)
the W register from 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 1:
SUBWF REG1, 1
Before Instruction
REG1
=3
W
=2
C
=?
After Instruction
REG1
=1
W
=2
C
= 1 ; result is positive
Example 2:
Before Instruction
REG1
=2
W
=2
C
=?
After Instruction
REG1
=0
W
=2
C
= 1 ; result is zero
Example 3:
Before Instruction
REG1
=1
W
=2
C
=?
After Instruction
REG1
= 0xFF
W
=2
C
= 0 ; result is negative
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 =
After Instruction
REG1 =
W
=
0xA5
0xA5
0x5A
TRIS
Load TRIS Register
Syntax:
[ label ] TRIS f
Operands:
f = 5, 6, 7, 8 or 9
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 PORTB
Before Instruction
W
= 0xA5
After Instruction
TRISB = 0xA5
© 2007 Microchip Technology Inc.
DS41213D-page 51
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