參數(shù)資料
型號: PIC18F86K90T-I/PTRSL
廠商: Microchip Technology
文件頁數(shù): 43/110頁
文件大?。?/td> 0K
描述: MCU 8BIT 64K FLASH 80-TQFP
標(biāo)準(zhǔn)包裝: 1,200
系列: PIC® XLP™ 18F
核心處理器: PIC
芯體尺寸: 8-位
速度: 64MHz
連通性: I²C,LIN,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,LCD,POR,PWM,WDT
輸入/輸出數(shù): 69
程序存儲器容量: 64KB(32K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量: 4K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 24x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 80-TQFP
包裝: 帶卷 (TR)
PIC18F47J53 FAMILY
DS39964B-page 490
Preliminary
2010 Microchip Technology Inc.
RETFIE
Return from Interrupt
Syntax:
RETFIE {s}
Operands:
s
[0,1]
Operation:
(TOS)
PC,
1 GIE/GIEH or PEIE/GIEL;
if s = 1,
(WS)
W,
(STATUSS)
STATUS,
(BSRS)
BSR,
PCLATU, PCLATH are unchanged
Status Affected:
GIE/GIEH, PEIE/GIEL.
Encoding:
0000
0001
000s
Description:
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 (default).
Words:
1
Cycles:
2
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
No
operation
No
operation
POP PC
from stack
Set GIEH or
GIEL
No
operation
No
operation
No
operation
No
operation
Example:
RETFIE
1
After Interrupt
PC
=
TOS
W=
WS
BSR
=
BSRS
STATUS
=
STATUSS
GIE/GIEH, PEIE/GIEL
=
1
RETLW
Return Literal to W
Syntax:
RETLW k
Operands:
0
k 255
Operation:
k
W,
(TOS)
PC,
PCLATU, PCLATH are unchanged
Status Affected:
None
Encoding:
0000
1100
kkkk
Description:
W is loaded with the eight-bit literal ‘k’.
The program counter is loaded from the
top of the stack (the return address).
The high address latch (PCLATH)
remains unchanged.
Words:
1
Cycles:
2
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
literal ‘k’
Process
Data
POP PC
from stack,
write to W
No
operation
No
operation
No
operation
No
operation
Example:
CALL TABLE ; W contains table
; offset value
; W now has
; table value
:
TABLE
ADDWF PCL
; W = offset
RETLW k0
; Begin table
RETLW k1
;
:
RETLW kn
; End of table
Before Instruction
W
=
07h
After Instruction
W
=
value of kn
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