PIC16C621A Datasheet

IC型号：
PIC16C621A
PDF描述：
EPROM-Based 8-Bit CMOS Microcontrollers
文件大小：
2148.18KB
PDF页数：
128页
芯片厂家：
Microchip

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PIC16C62X

NOP

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Example

NOP

No Operation

[

label

]

None

No operation

None

0000

0xx0

0000

RETFIE

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Return from Interrupt

[

label

]

None

TOS

鈫?/div>

PC,

鈫?/div>

GIE

None

0000

1001

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.

NOP

RETFIE

No operation.

Words:

Cycles:

Example

RETFIE

After Interrupt

PC =

GIE =

TOS

OPTION

Syntax:

Operands:

Operation:

Encoding:

Description:

Load Option Register

[

label

]

None

(W)

鈫?/div>

OPTION

0000

0110

0010

RETLW

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Return with Literal in W

[

label

]

RETLW k

鈮?/div>

255

鈫?/div>

(W);

TOS

鈫?/div>

None

01xx

kkkk

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.

OPTION

Status Affected: None

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 readable/writable

address it.

Words:

Cycles:

Example

To maintain upward compatibility

with future PICmicro鈩?products,

do not use this instruction.

Words:

Cycles:

Example

CALL TABLE

鈥?/div>

value

鈥?/div>

TABLE 鈥?/div>

ADDWF

RETLW

鈥?/div>

RETLW

;W contains table

;offset value

;W now has table

;W = offset

;Begin table

;

; End of table

Before Instruction

0x07

value of k8

After Instruction

漏

1998 Microchip Technology Inc.

Preliminary

DS30235G-page 69

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