PIC16C432 Datasheet, PDF (73/106 Pages) Microchip Technology – OTP 8-Bit CMOS MCU with LIN Transceiver

PIC16C432
SUBLW
Syntax:
Operands:
Operation:
Status
Affected:
Encoding:
Description:
Words:
Cycles:
Example 1:
Example 2:
Example 3:
Subtract W from Literal
[ label ] SUBLW k
0 ≤ k ≤ 255
k - (W) → (W)
C, DC, Z
11
110x kkkk kkkk
The W register is subtracted (2’s
complement method) from the eight
bit literal 'k'. The result is placed in the
W register.
1
1
SUBLW 0x02
Before Instruction
W= 1
C=?
After Instruction
W= 1
C = 1; result is positive
Before Instruction
W= 2
C= ?
After Instruction
W= 0
C = 1; result is zero
Before Instruction
W= 3
C=?
After Instruction
W = 0xFF
C = 0; result is negative
SUBWF
Syntax:
Operands:
Operation:
Status
Affected:
Encoding:
Description:
Words:
Cycles:
Example 1:
Example 2:
Example 3:
Subtract W from f
[ label ] _{SUBWF f,d}
0 ≤ f ≤ 127
d ∈ [0,1]
(f) - (W) → (dest)
C, DC, Z
00
0010 dfff ffff
Subtract (2’s complement method)
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 reg-
ister 'f'.
1
1
SUBWF REG1,1
Before Instruction
REG1 = 3
W
=2
C
=?
After Instruction
REG1 =
W
=
C
=
1
2
1; result is positive
Before Instruction
REG1 = 2
W
=2
C
=?
After Instruction
REG1 =
W
=
C
=
0
2
1; result is zero
Before Instruction
REG1 = 1
W
=2
C
=?
After Instruction
REG1 =
W
=
C
=
0xFF
2
0; result is negative
 2002 Microchip Technology Inc.
Preliminary
DS41140B-page 71