PIC16F818_13 Datasheet, PDF (109/178 Pages) Microchip Technology – 18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Technology

RETFIE
Syntax:
Operands:
Operation:
Status Affected:
Return from Interrupt
[ label ] RETFIE
None
TOS  PC,
1  GIE
None
PIC16F818/819
RLF
Syntax:
Operands:
Operation:
Status Affected:
Description:
Rotate Left f through Carry
[ label ] RLF f,d
0  f  127
d  [0,1]
See description below
C
The contents of register ‘f’ are
rotated one bit to the left through
the Carry flag. If ‘d’ = 0, the result
is placed in the W register. If
‘d’ = 1, the result is stored back in
register ‘f’.
C
Register f
RETLW
Syntax:
Operands:
Operation:
Status Affected:
Description:
Return with Literal in W
[ label ] RETLW k
0  k  255
k  (W);
TOS  PC
None
The W register is loaded with the
eight-bit literal ‘k’. The program
counter is loaded from the top of
the stack (the return address).
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  [0,1]
See description below
C
The contents of register ‘f’ are
rotated one bit to the right through
the Carry flag. If ‘d’ = 0, the result
is placed in the W register. If
‘d’ = 1, the result is placed back in
register ‘f’.
C
Register f
RETURN
Syntax:
Operands:
Operation:
Status Affected:
Description:
Return from Subroutine
[ label ] RETURN
None
TOS  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.
SLEEP
Syntax:
Operands:
Operation:
Status Affected:
Description:
Enter Sleep mode
[ label ] SLEEP
None
00h  WDT,
0  WDT prescaler,
1  TO,
0  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.
 2001-2013 Microchip Technology Inc.
DS39598F-page 109