PIC16F1825T-ESS datasheet(345/448 Pages) MICROCHIP

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DS41440C-page 345

PIC16(L)F1825/1829

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,

0  WDT prescaler,

1  TO,

0  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

prescaler 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

complement 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

complement 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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