PIC16F684 datasheet(119/192 Pages) MICROCHIP

119 / 192 page

DS41202F-page 117

PIC16F684

13.2

Instruction Descriptions

ADDLW

Add literal and W

Syntax:

[ label ] ADDLW

Operands:

≤ k ≤ 255

Operation:

(W) + k

→ (W)

Status Affected:

C, DC, Z

Description:

The contents of the W register

are added to the eight-bit literal ‘k’

and the result is placed in the

W register.

ADDWF

Add W and f

Syntax:

[ label ] ADDWF

f,d

Operands:

≤ f ≤ 127

∈ [0,1]

Operation:

(W) + (f)

→ (destination)

Status Affected:

C, DC, Z

Description:

Add the contents of the W register

with register ‘f’. If ‘d’ is ‘0’, the

result is stored in the W register. If

‘d’ is ‘1’, the result is stored back

in register ‘f’.

ANDLW

AND literal with W

Syntax:

[ label ] ANDLW

Operands:

≤ k ≤ 255

Operation:

(W) .AND. (k)

→ (W)

Status Affected:

Description:

The contents of W register are

AND’ed with the eight-bit literal

‘k’. The result is placed in the W

ANDWF

AND W with f

Syntax:

[ label ] ANDWF

f,d

Operands:

≤ f ≤ 127

∈ [0,1]

Operation:

(W) .AND. (f)

→ (destination)

Status Affected:

Description:

AND the W register with register

‘f’. If ‘d’ is ‘0’, the result is stored in

the W register. If ‘d’ is ‘1’, the

result is stored back in register ‘f’.

BCF

Bit Clear f

Syntax:

[ label ] BCF

f,b

Operands:

≤ f ≤ 127

≤ b ≤ 7

Operation:

→ (f<b>)

Status Affected:

None

Description:

Bit ‘b’ in register ‘f’ is cleared.

BSF

Bit Set f

Syntax:

[ label ] BSF

f,b

Operands:

≤ f ≤ 127

≤ b ≤ 7

Operation:

→ (f<b>)

Status Affected:

None

Description:

Bit ‘b’ in register ‘f’ is set.

BTFSC

Bit Test, Skip if Clear

Syntax:

[ label ] BTFSC f,b

Operands:

≤ f ≤ 127

≤ b ≤ 7

Operation:

skip if (f<b>) = 0

Status Affected:

None

Description:

If bit ‘b’ in register ‘f’ is ‘1’, the next

instruction is executed.

If bit ‘b’, in register ‘f’, is ‘0’, the

next instruction is discarded, and

a NOP is executed instead, making

this a 2-cycle instruction.

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