PIC16F1933-ESLASHP datasheet(345/418 Pages) MICROCHIP

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Preliminary

DS41364A-page 343

PIC16F193X/LF193X

CALL

Call Subroutine

Syntax:

[ label ] CALL k

Operands:

≤ k ≤ 2047

Operation:

(PC)+ 1

→ TOS,

→ PC<10:0>,

(PCLATH<4:3>)

→ PC<12:11>

Status Affected:

None

Description:

Call Subroutine. First, return address

(PC + 1) is pushed onto the stack.

The eleven-bit immediate address is

loaded into PC bits <10:0>. The upper

bits of the PC are loaded from

PCLATH. CALL is a two-cycle instruc-

tion.

CALLW

Subroutine Call With W

Syntax:

[ label ] CALLW

Operands:

None

Operation:

(PC) +1

→ TOS,

(W)

→ PC<7:0>,

(PCLATH<6:0>)

→ PC<14:8>

Status Affected:

None

Description:

Subroutine call with W. First, the

return address (PC + 1) is pushed

onto the return stack. Then, the con-

tents of W is loaded into PC<7:0>,

and the contents of PCLATH into

PC<14:8>. CALLW is a two-cycle

instruction.

CLRF

Clear f

Syntax:

[ label ] CLRF

Operands:

≤ f ≤ 127

Operation:

00h

→ (f)

→ Z

Status Affected:

Description:

The contents of register ‘f’ are cleared

and the Z bit is set.

CLRW

Clear W

Syntax:

[ label ] CLRW

Operands:

None

Operation:

00h

→ (W)

→ Z

Status Affected:

Description:

W register is cleared. Zero bit (Z) is

set.

CLRWDT

Clear Watchdog Timer

Syntax:

[ label ] CLRWDT

Operands:

None

Operation:

00h

→ WDT

→ WDT prescaler,

→ TO

→ PD

Status Affected:

TO, PD

Description:

CLRWDT

instruction resets the Watch-

dog Timer. It also resets the prescaler

of the WDT.

Status bits TO and PD are set.

COMF

Complement f

Syntax:

[ label ] COMF

f,d

Operands:

≤ f ≤ 127

∈ [0,1]

Operation:

(f)

→ (destination)

Status Affected:

Description:

The contents of register ‘f’ are com-

plemented. If ‘d’ is ‘0’, the result is

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

stored back in register ‘f’.

DECF

Decrement f

Syntax:

[ label ] DECF f,d

Operands:

≤ f ≤ 127

∈ [0,1]

Operation:

(f) - 1

→ (destination)

Status Affected:

Description:

Decrement register ‘f’. If ‘d’ is ‘0’, the

result is stored in the W

back in register ‘f’.

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