P12C508 datasheet(39/84 Pages) MICROCHIP

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Advance Information

DS40139A-page 39

PIC12C5XX

ADDWF

Add W and f

Syntax:

[

label ] ADDWF

f,d

Operands:

≤ f ≤ 31

∈ [0,1]

Operation:

(W) + (f)

→ (dest)

Status Affected:

C, DC, Z

Encoding:

0001

11df

ffff

Description:

Add the contents of the W register and

in the W register. If 'd' is '1' the result is

stored back in register 'f'

Words:

Cycles:

Example:

ADDWF

FSR, 0

Before Instruction

0x17

FSR =

0xC2

After Instruction

0xD9

FSR =

0xC2

ANDLW

And literal with W

Syntax:

[

label ] ANDLW

Operands:

≤ k ≤ 255

Operation:

(W).AND. (k)

→ (W)

Status Affected:

Encoding:

1110

kkkk

Description:

The contents of the W register are

AND’ed with the eight-bit literal 'k'. The

result is placed in the W register

Words:

Cycles:

Example:

ANDLW

0x5F

Before Instruction

0xA3

After Instruction

0x03

ANDWF

AND W with f

Syntax:

[

label ] ANDWF

f,d

Operands:

≤ f ≤ 31

∈ [0,1]

Operation:

(W) .AND. (f)

→ (dest)

Status Affected:

Encoding:

0001

01df

ffff

Description:

The contents of the W register are

AND’ed 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'

Words:

Cycles:

Example:

ANDWF

FSR,

Before Instruction

0x17

FSR =

0xC2

After Instruction

0x17

FSR =

0x02

BCF

Bit Clear f

Syntax:

[

label ] BCF

f,b

Operands:

≤ f ≤ 31

≤ b ≤ 7

Operation:

→ (f<b>)

Status Affected:

None

Encoding:

0100

bbbf

ffff

Description:

Bit 'b' in register 'f' is cleared.

Words:

Cycles:

Example:

BCF

FLAG_REG,

Before Instruction

FLAG_REG = 0xC7

After Instruction

FLAG_REG = 0x47

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