PIC16F688

Manufacturer Part NumberPIC16F688
ManufacturerMicrochip Technology Inc.
PIC16F688 datasheet
 


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RETFIE
Return from Interrupt
Syntax:
[ label ]
RETFIE
Operands:
None
TOS → PC,
Operation:
1 → GIE
Status Affected:
None
Description:
Return from Interrupt. Stack is
POPed and Top-of-Stack (TOS) is
loaded in the PC. Interrupts are
enabled by setting Global
Interrupt Enable bit, GIE
(INTCON<7>). This is a two-cycle
instruction.
Words:
1
Cycles:
2
Example:
RETFIE
After Interrupt
PC =
TOS
GIE =
1
© 2007 Microchip Technology Inc.
PIC16F688
RETLW
Return with literal in W
Syntax:
[ label ]
RETLW k
0 ≤ k ≤ 255
Operands:
k → (W);
Operation:
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.
Words:
1
Cycles:
2
Example:
CALL TABLE;W contains
table
;offset value
;W now has table value
TABLE
ADDWF PC ;W = offset
RETLW k1 ;Begin table
RETLW k2 ;
RETLW kn ; End of table
Before Instruction
W
=
0x07
After Instruction
W
=
value of k8
RETURN
Return from Subroutine
Syntax:
[ label ]
RETURN
Operands:
None
TOS → PC
Operation:
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.
DS41203D-page 135