PIC16F1933-ESLASHP datasheet(351/418 Pages) MICROCHIP

351 / 418 page

Preliminary

DS41364A-page 349

PIC16F193X/LF193X

RRF

Rotate Right f through Carry

Syntax:

[ label ]

RRF f,d

Operands:

≤ f ≤ 127

∈ [0,1]

Operation:

See description below

Status Affected:

Description:

The contents of register ‘f’ are rotated

one bit to the right through the Carry

flag. If ‘d’ is ‘0’, the result is placed in

the W register. If ‘d’ is ‘1’, the result is

placed back in register ‘f’.

SLEEP

Enter Sleep mode

Syntax:

[ label ]SLEEP

Operands:

None

Operation:

00h

→ WDT,

→ WDT prescaler,

→ TO,

→ PD

Status Affected:

TO, PD

Description:

The power-down Status bit, PD is

cleared. Time-out Status bit, TO is

set. Watchdog Timer and its pres-

caler are cleared.

The processor is put into Sleep mode

with the oscillator stopped.

SUBLW

Subtract W from literal

Syntax:

[ label ]SUBLW k

Operands:

≤ k ≤ 255

Operation:

k - (W)

→ (W)

Status Affected:

C, DC, Z

Description:

The W register is subtracted (2’s com-

plement method) from the eight-bit

literal ‘k’. The result is placed in the W

SUBWF

Subtract W from f

Syntax:

[ label ]

SUBWF f,d

Operands:

≤ f ≤ 127

∈ [0,1]

Operation:

(f) - (W)

→ (destination)

Status Affected:

C, DC, Z

Description:

Subtract (2’s complement method) W

result is stored in the W

back in register ‘f.

SUBWFB

Subtract W from f with Borrow

Syntax:

SUBWFB

f {,d}

Operands:

≤ f ≤ 127

∈ [0,1]

Operation:

(f) – (W) – (B)

→ dest

Status Affected:

C, DC, Z

Description:

Subtract W and the BORROW flag

(CARRY) from register ‘f’ (2’s comple-

ment method). If ‘d’ is ‘0’, the result is

stored in W. If ‘d’ is ‘1’, the result is

stored back in register ‘f’.

C = 0

> k

C = 1

≤ k

DC = 0

W<3:0>

> k<3:0>

DC = 1

W<3:0>

≤ k<3:0>

C = 0

> f

C = 1

≤ f

DC = 0

W<3:0>

> f<3:0>

DC = 1

W<3:0>

≤ f<3:0>

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