PIC16C745/765
RETFIE
Return from Interrupt
[ label ] RETFIE
None
RLF
Rotate Left f through Carry
[ label ] RLF f,d
0 ≤ f ≤ 127
Syntax:
Syntax:
Operands:
Operands:
Operation:
d
[0,1]
TOS → PC,
1 → GIE
Operation:
See description below
C
Status Affected: None
Status Affected:
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’.
C
Register f
RETLW
Return with Literal in W
Syntax:
[ label ] RETLW k
RRF
Rotate Right f through Carry
[ label ] RRF f,d
0 ≤ f ≤ 127
Operands:
Operation:
0 ≤ k ≤ 255
Syntax:
Operands:
k → (W);
TOS → PC
d
[0,1]
Status Affected: None
Operation:
See description below
C
Description:
The W register is loaded with the
Status Affected:
Description:
eight bit literal ’k’. The program
counter is loaded from the top of
the stack (the return address).
This is a two cycle instruction.
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 reg-
ister ’f’.
C
Register f
RETURN
Syntax:
Return from Subroutine
[ label ] RETURN
None
SLEEP
Operands:
Operation:
Syntax:
[ label
]
TOS → PC
SLEEP
Status Affected: None
Operands:
Operation:
None
Description: Return from subroutine. The stack
00h → WDT,
0 → WDT prescaler,
1 → TO,
is POPed and the top of the stack
(TOS) is loaded into the program
counter. This is a two cycle
instruction.
0 → PD
Status Affected:
Description:
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.
See Section 13.9 for more
details.
1999 Microchip Technology Inc.
Advanced Information
DS41124A-page 115
MICROCHIP [ MICROCHIP ]
