PIC12F635ESLASHSS datasheet(139/196 Pages) MICROCHIP

139 / 196 page

Preliminary

DS41232B-page 137

PIC12F635/PIC16F636/639

RETFIE

Return from Interrupt

Syntax:

[ label ]

RETFIE

Operands:

None

Operation:

TOS

→ PC,

→ GIE

Status Affected: None

Encoding:

0000

1001

Description:

Return from interrupt. Stack is POPed

and Top-of-Stack (TOS) is loaded in

the PC. Interrupts are enabled by

setting the Global Interrupt Enable bit,

GIE (INTCON<7>). This is a

two-cycle instruction.

Words:

Cycles:

Example:

RETFIE

After Interrupt

PC =

TOS

GIE =

RETLW

Return with Literal in W

Syntax:

[ label ]

RETLW k

Operands:

≤ k ≤ 255

Operation:

→ (W);

TOS

→ PC

Status Affected: None

Encoding:

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:

Cycles:

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

0x07

After Instruction

value of k8

RETURN

Return from Subroutine

Syntax:

[ label ]

RETURN

Operands:

None

Operation:

TOS

→ PC

Status Affected:

None

Description:

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.

RLF

Rotate Left f through Carry

Syntax:

[ label ]

RLF

f,d

Operands:

≤ f ≤ 127

∈ [0,1]

Operation:

See description below

Status Affected:

Encoding:

1101

dfff

ffff

Description:

The contents of register ‘f’ are

rotated one bit to the left through

the CARRY flag. If ‘d’ is ‘0’, the

result is placed in the W register.

If ‘d’ is ‘1’, the result is stored

back in register ‘f’.

Words:

Cycles:

Example:

RLF

REG1,0

Before Instruction

REG1

1110 0110

After Instruction

REG1

1110 0110

1100 1100

PIC12F635E/SS датащи(PDF) 139 Page - Microchip Technology

PIC12F635E/SS датащи(HTML) 139 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL