PIC18F2331-E/ML MICROCHIP [Microchip Technology], PIC18F2331-E/ML Datasheet - Page 314
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PIC18F2331-E/ML
Manufacturer Part Number
PIC18F2331-E/ML
Description
28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F2331-EML.pdf
(392 pages)
- Current page: 314 of 392
- Download datasheet (4Mb)
PIC18F2331/2431/4331/4431
RETFIE
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS39616D-page 314
Q Cycle Activity:
After Interrupt
operation
Decode
PC
W
BSR
STATUS
GIE/GIEH, PEIE/GIEL
No
Q1
operation
operation
Return from Interrupt
[ label ]
s [0,1]
(TOS) PC,
1 GIE/GIEH or PEIE/GIEL;
if s = 1:
(WS) W,
(STATUSS) STATUS,
(BSRS) BSR,
PCLATU, PCLATH are unchanged
GIE/GIEH, PEIE/GIEL.
Return from interrupt. Stack is popped
and Top-of-Stack (TOS) is loaded into
the PC. Interrupts are enabled by
setting either the high or low-priority
global interrupt enable bit. If ‘s’ = 1, the
contents of the shadow registers, WS,
STATUSS and BSRS, are loaded into
their corresponding registers, W,
STATUS and BSR. If ‘s’ = 0, no update
of these registers occurs.
1
2
RETFIE
0000
No
No
Q2
RETFIE [s]
1
0000
operation
operation
=
=
=
=
=
No
No
Q3
TOS
WS
BSRS
STATUSS
1
0001
Set GIEH or
from stack
operation
POP PC
GIEL
No
Q4
000s
RETLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
TABLE
Q Cycle Activity:
:
:
:
CALL TABLE ; W contains table
ADDWF PCL
RETLW k0
RETLW k1
RETLW kn
Before Instruction
After Instruction
operation
Decode
W
W
No
Q1
; offset value
; W now has
; table value
; W = offset
; Begin table
;
; End of table
=
=
operation
Return Literal to W
[ label ]
0 k 255
k W,
(TOS) PC,
PCLATU, PCLATH are unchanged
None
W is loaded with the 8-bit literal, ‘k’. The
program counter is loaded from the top
of the stack (the return address). The
high address latch (PCLATH) remains
unchanged.
1
2
literal ‘k’
Read
0000
No
Q2
0x07
value of kn
2010 Microchip Technology Inc.
RETLW k
1100
operation
Process
Data
No
Q3
kkkk
from stack,
Write to W
operation
POP PC
No
Q4
kkkk
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