PIC16F/LF1946/47
SUBLW
Subtract W from literal
RRF
Rotate Right f through Carry
Syntax:
[ label ] SUBLW
0 k 255
k
Syntax:
[ label ] RRF f,d
Operands:
Operation:
Status Affected:
Description:
Operands:
0 f 127
d [0,1]
k - (W) W)
C, DC, Z
Operation:
See description below
C
The W register is subtracted (2’s com-
plement method) from the eight-bit
literal ‘k’. The result is placed in the W
register.
Status Affected:
Description:
The contents of register ‘f’ are rotated
one bit to the right through the Carry
flag. If ‘d’ is ‘0’, the result is placed in
the W register. If ‘d’ is ‘1’, the result is
placed back in register ‘f’.
C = 0
W k
C = 1
W k
C
Register f
DC = 0
DC = 1
W<3:0> k<3:0>
W<3:0> k<3:0>
SUBWF
Subtract W from f
SLEEP
Enter Sleep mode
[ label ] SLEEP
None
Syntax:
[ label ] SUBWF f,d
Syntax:
Operands:
0 f 127
d [0,1]
Operands:
Operation:
00h WDT,
0 WDT prescaler,
1 TO,
Operation:
(f) - (W) destination)
Status Affected:
Description:
C, DC, Z
0 PD
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 register ‘f.
Status Affected:
Description:
TO, PD
The power-down Status bit, PD is
cleared. Time-out Status bit, TO is
set. Watchdog Timer and its pres-
caler are cleared.
C = 0
W f
The processor is put into Sleep mode
with the oscillator stopped.
C = 1
W f
DC = 0
DC = 1
W<3:0> f<3:0>
W<3:0> f<3:0>
SUBWFB
Subtract W from f with Borrow
Syntax:
SUBWFB f {,d}
Operands:
0 f 127
d [0,1]
Operation:
(f) – (W) – (B) dest
Status Affected:
Description:
C, DC, Z
Subtract W and the BORROW flag
(CARRY) from register ‘f’ (2’s comple-
ment method). If ‘d’ is ‘0’, the result is
stored in W. If ‘d’ is ‘1’, the result is
stored back in register ‘f’.
2010 Microchip Technology Inc.
Preliminary
DS41414A-page 379
MICROCHIP [ MICROCHIP ]
