参数资料
型号: PIC16LC433E/P
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDIP18
封装: 0.300 INCH, PLASTIC, DIP-18
文件页数: 97/122页
文件大小: 1862K
代理商: PIC16LC433E/P
PIC16C433
DS41139A-page 74
Advance Information
2001 Microchip Technology Inc.
NOP
No Operation
Syntax:
[ label ]
NOP
Operands:
None
Operation:
No operation
Status Affected:
None
Encoding:
00
0000
0xx0
0000
Description:
No operation.
Words:
1
Cycles:
1
Example
NOP
OPTION
Load Option Register
Syntax:
[ label ]
OPTION
Operands:
None
Operation:
(W)
→ OPTION
Status Affected:
None
Encoding:
00
0000
0110
0010
Description:
The contents of the W register are
loaded in the OPTION register.
This instruction is supported for
code compatibility with PIC16C5X
products. Since OPTION is a read-
able/writable register, the user can
directly address it.
Words:
1
Cycles:
1
Example
To maintain upward compatibility
with future PIC16C433 products, do
not use this instruction.
RETFIE
Return from Interrupt
Syntax:
[ label ]
RETFIE
Operands:
None
Operation:
TOS
→ PC,
1
→ GIE
Status Affected:
None
Encoding:
00
0000
1001
Description:
Return from Interrupt. Stack is
POPed and Top-of-Stack (TOS) is
loaded in the PC. Interrupts are
enabled by setting Global Inter-
rupt Enable bit, GIE
(INTCON<7>). This is a two-cycle
instruction.
Words:
1
Cycles:
2
Example
RETFIE
After Interrupt
PC =
TOS
GIE =
1
RETLW
Return with Literal in W
Syntax:
[ label ]
RETLW k
Operands:
0
≤ k ≤ 255
Operation:
k
→ (W);
TOS
→ PC
Status Affected: None
Encoding:
11
01xx
kkkk
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
TABLE
CALL TABLE;W contains table
;offset value
;W now has table value
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
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