PIC16F616 Microchip Technology Inc., PIC16F616 Datasheet - Page 133

• Manufacturer Part Number: PIC16F616
• Description: 14-pin Flash-based, 8-bit Cmos Microcontrollers
• Manufacturer: Microchip Technology Inc.

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
PIC16F610/616/16HV610/616
Preliminary
RETLW
Syntax:
Operands:
Operation:
Status Affected:
Description:
Words:
Cycles:
Example:
TABLE
DONE
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
GOTO DONE
•
•
ADDWF PC
RETLW k1
RETLW k2
•
•
•
RETLW kn
W
W
RETURN
RETLW k
=
=
;table offset
;value
;W = offset
;Begin table
;
;End of table
DS41288C-page 131
0x07
value of k8