PIC16F570 datasheet(74/129 Pages) MICROCHIP

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PIC16F570

DS40001684E-page 74

 2013-2014 Microchip Technology Inc.

RETLW

Return with Literal in W

Syntax:

[ label ]

RETLW k

Operands:

 k  255

Operation:

 (W);

TOS

 PC

Status Affected: None

Description:

The W register is loaded with the

8-bit literal ‘k’. The program

counter is loaded from the top of

the stack (the return address). This

is a two-cycle instruction.

RETURN

Return

Syntax:

[ label ]

RETURN

Operands:

None

Operation:

TOS

 PC

Status Affected: None

Description:

The program counter is loaded

from the top of the stack (the

return address). This is a two-

cycle instruction.

RLF

Rotate Left f through Carry

Syntax:

[ label ]

RLF f,d

Operands:

 f  31

 [0,1]

Operation:

See description below

Status Affected: C

Description:

The contents of register ‘f’ are

rotated 1 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’.

RRF

Rotate Right f through Carry

Syntax:

[ label ] RRF f,d

Operands:

 f  31

 [0,1]

Operation:

See description below

Status Affected: C

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

SLEEP

Enter SLEEP Mode

Syntax:

[label ] SLEEP

Operands:

None

Operation:

00h

 WDT;

 WDT prescaler;

 TO;

 PD

Status Affected: TO, PD, RBWUF

Description:

Time-out Status bit (TO) is set. The

Power-down Status bit (PD) is

cleared.

RBWUF is unaffected.

The WDT and its prescaler are

cleared.

The processor is put into Sleep

mode with the oscillator stopped.

See Section 8.10 “Power-down

Mode (Sleep)” on Sleep for more

details.

SUBWF

Subtract W from f

Syntax:

[label ] SUBWF f,d

Operands:

f 31

 [0,1]

Operation:

(f) – (W)

dest)

Status Affected: C, DC, Z

Description:

Subtract (2’s complement method)

the W register from register ‘f’. If ‘d’

is ‘0’, the result is stored in the W

stored back in register ‘f’.

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