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PIC16LF877A-I Datasheet, PDF (166/234 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers | |||
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PIC16F87XA
RLF
Rotate Left f through Carry
Syntax:
Operands:
Operation:
Status Affected:
Description:
[ label ] RLF f,d
0 ⤠f ⤠127
d â [0,1]
See description below
C
The contents of register âfâ are
rotated one bit to the left through the
Carry flag. If âdâ is â0â, the result is
placed in the W register. If âdâ is â1â,
the result is stored back in register âfâ.
C
Register f
RETURN
Syntax:
Operands:
Operation:
Status Affected:
Description:
Return from Subroutine
[ label ] RETURN
None
TOS â PC
None
Return from subroutine. The stack
is POPed and the top of the stack
(TOS) is loaded into the program
counter. This is a two-cycle
instruction.
RRF
Syntax:
Operands:
Operation:
Status Affected:
Description:
Rotate Right f through Carry
[ label ] RRF f,d
0 ⤠f ⤠127
d â [0,1]
See description below
C
The contents of register âfâ are
rotated one bit to the right through
the Carry flag. If âdâ is â0â, the
result is placed in the W register.
If âdâ is â1â, the result is placed
back in register âfâ.
C
Register f
SLEEP
Syntax:
Operands:
Operation:
Status Affected:
Description:
[ label ] SLEEP
None
00h â WDT,
0 â WDT prescaler,
1 â TO,
0 â PD
TO, PD
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.
SUBLW
Subtract W from Literal
Syntax:
[ label ] SUBLW k
Operands:
0 ⤠k ⤠255
Operation:
k - (W) â (W)
Status Affected: C, DC, Z
Description:
The W register is subtracted (2âs
complement method) from the
eight-bit literal âkâ. The result is
placed in the W register.
SUBWF
Syntax:
Operands:
Operation:
Status
Affected:
Description:
Subtract W from f
[ label ] SUBWF f,d
0 ⤠f ⤠127
d â [0,1]
(f) - (W) â (destination)
C, DC, Z
Subtract (2âs complement method)
W register from register âfâ. If âdâ is
â0â, the result is stored in the W
register. If âdâ is â1â, the result is
stored back in register âfâ.
DS39582B-page 164
 2003 Microchip Technology Inc.
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