PIC12F683-E/MD MICROCHIP [Microchip Technology], PIC12F683-E/MD Datasheet - Page 109
PIC12F683-E/MD
Manufacturer Part Number
PIC12F683-E/MD
Description
8-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC12F683-EMD.pdf
(176 pages)
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RETFIE
Syntax:
Operands:
Operation:
Status Affected:
Description:
Words:
Cycles:
Example:
© 2007 Microchip Technology Inc.
Return from Interrupt
[ label ]
None
TOS → PC,
1 → GIE
None
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.
1
2
After Interrupt
RETFIE
PC =
GIE =
RETFIE
TOS
1
RETLW
Syntax:
Operands:
Operation:
Status Affected:
Description:
Words:
Cycles:
Example:
TABLE
RETURN
Syntax:
Operands:
Operation:
Status Affected:
Description:
Return from Subroutine
[ label ]
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.
Return with literal in W
[ label ]
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.
1
2
Before Instruction
After Instruction
CALL TABLE;W contains
table
•
•
•
ADDWF PC ;W = offset
RETLW k1 ;Begin table
RETLW k2 ;
•
•
•
RETLW kn ; End of table
;offset value
;W now has table value
PIC12F683
W
W
RETURN
RETLW k
=
=
DS41211D-page 107
0x07
value of k8
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