PIC16F688
SLEEP
RLF
Rotate Left f through Carry
Syntax:
[ label ] SLEEP
Syntax:
Operands:
[ label ]
RLF f,d
Operands:
Operation:
None
0 ≤ f ≤ 127
d
[0,1]
00h → WDT,
0 → WDT prescaler,
1 → TO,
Operation:
See description below
C
Status Affected:
Encoding:
0 → PD
00
1101
dfff
ffff
Status Affected:
Description:
TO, PD
Description:
The contents of register ‘f’ are
rotated one bit to the left through
the Carry Flag. If ‘d’ is ‘0’, the
result is placed in the W register.
If ‘d’ is ‘1’, the result is stored
back in register ‘f’.
The power-down Status bit, PD is
cleared. Time-out Status bit, TO
is set. Watchdog Timer and its
prescaler are cleared.
The processor is put into Sleep
mode with the oscillator stopped.
C
Register f
Words:
Cycles:
Example
1
1
SUBLW
Subtract W from Literal
Syntax:
[ label ] SUBLW k
0 ≤ k ≤ 255
RLF
REG1,0
Operands:
Operation:
Before Instruction
k - (W) → (W)
REG1
=
=
1110 0110
0
C
Status Affected: C, DC, Z
After Instruction
Description:
The W register is subtracted (2’s
REG1
=
=
=
1110 0110
1100 1100
1
complement method) from the
eight-bit literal ‘k’. The result is
placed in the W register.
W
C
RRF
Rotate Right f through Carry
SUBWF
Subtract W from f
Syntax:
[ label ] RRF f,d
0 ≤ f ≤ 127
Syntax:
[ label ] SUBWF f,d
0 ≤ f ≤ 127
Operands:
Operands:
d
[0,1]
d
[0,1]
Operation:
See description below
C
Operation:
(f) - (W) → (destination)
Status Affected:
Description:
Status Affected: C, DC, Z
Description: Subtract (2’s complement method)
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’.
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’.
C
Register f
DS41203B-page 126
Preliminary
2004 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
