PIC16F716 datasheet(76/126 Pages) MICROCHIP

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PIC16F716

DS41206A-page 74

Preliminary

 2003 Microchip Technology Inc.

BCF

Bit Clear f

Syntax:

[ label ] BCF

f,b

Operands:

≤ f ≤ 127

≤ b ≤ 7

Operation:

→ (f<b>)

Status Affected:

None

Encoding:

00bb

bfff

ffff

Description:

Bit ‘b’ in register ‘f’ is cleared.

Words:

Cycles:

Example

BCF

REG1, 7

Before Instruction

REG1

= 0xC7

After Instruction

REG1

= 0x47

BSF

Bit Set f

Syntax:

[ label ] BSF

f,b

Operands:

≤ f ≤ 127

≤ b ≤ 7

Operation:

→ (f<b>)

Status Affected:

None

Encoding:

01bb

bfff

ffff

Description:

Bit ‘b’ in register ‘f’ is set.

Words:

Cycles:

Example

BSF

REG1, 7

Before Instruction

REG1

= 0x0A

After Instruction

REG1

= 0x8A

BTFSC

Bit Test f, Skip if Clear

Syntax:

[ label ] BTFSC f,b

Operands:

≤ f ≤ 127

≤ b ≤ 7

Operation:

skip if (f<b>) = 0

Status Affected:

None

Encoding:

10bb

bfff

ffff

Description:

If bit ‘b’ in register ‘f’ is ‘0’ then the

next instruction is skipped.

If bit ‘b’ is ‘0’ then the next

instruction fetched during the

current instruction execution is

discarded, and a NOP is executed

instead, making this a two-cycle

instruction.

Words:

Cycles:

1(2)

Example

HERE

FALSE

TRUE

BTFSC

GOTO

•

REG1

PROCESS_CODE

Before Instruction

PC = address HERE

After Instruction

if REG<1> = 0,

PC = address TRUE

if REG<1>=1,

PC = address FALSE

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