Datasheet

 1998-2013 Microchip Technology Inc. DS30605D-page 105
PIC16C63A/65B/73B/74B
RETFIE Return from Interrupt
Syntax: [ label ] RETFIE
Operands: None
Operation: TOS  PC,
1  GIE
Status Affected:
None
RETLW Return with Literal in W
Syntax: [ label ] RETLW k
Operands: 0  k  255
Operation: k  (W);
TOS  PC
Status Affected: None
Description:
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.
RETURN Return from Subroutine
Syntax: [ label ] RETURN
Operands: None
Operation: TOS  PC
Status Affected: None
Description:
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.
RLF Rotate Left f through Carry
Syntax: [ label ] RLF f,d
Operands: 0  f  127
d  [0,1]
Operation: See description below
Status Affected: C
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'.
RRF Rotate Right f through Carry
Syntax: [ label ] RRF f,d
Operands: 0  f  127
d  [0,1]
Operation: See description below
Status Affected: C
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'.
SLEEP
Syntax: [ label ] SLEEP
Operands: None
Operation: 00h  WDT,
0  WDT prescaler,
1  TO
,
0  PD
Status Affected: TO, PD
Description:
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. See
Section 13.8 for more details.
Register fC
Register fC