FS91M68 datasheet(20/24 Pages) FORTUNE

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FS91M68

GOTO

Unconditional Branch

Syntax:

GOTOk

≤ k ≤ 1FFFh

Operation:

← k

Flag Affected:

None

Description:

The immediate address is

loaded into PC.

Cycle:

Example:

GOTO THERE

After instruction:

PC = address (THERE)

INCF

Increment

Syntax:

INCF

f, d

≤ f ≤ FFh

∈ [0,1]

Operation:

[Destination]

← [f] +1

Flag Affected:

Description:

[f] is incremented. If d is 0, the

result is stored in the W register.

If d is 1, the result is stored back

in [f].

Cycle:

Example 1:

INCF

OPERAND,0

Before instruction:

W = 88h, OPERAND = 23h

After instruction:

W = 24h, OPERAND = 23h

Example 2:

INCF

OPERAND,1

Before instruction:

W = 88h, OPERAND = 23h

After instruction:

W = 88h, OPERAND = 24h

INCFSZ

Increment f, skip if zero

Syntax:

INCFSZ

f, d

≤ f ≤ FFh

∈ [0,1]

Operation:

[Destination]

← [f] + 1, skip if the

result is zero

Flag Affected:

None

Description:

[f] is incremented. If d is 0, the

result is stored in the W register.

If d is 1, the result is stored back

in [f].

If the result is 0, then the next

fetched instruction is discarded

and a NOP is executed instead

making it a two-cycle instruction.

Cycle:

1, 2

Example:

Node

INCFSZ FLAG, 1

OP1

OP2

Before instruction:

PC = address (Node)

After instruction:

[FLAG] = [FLAG] + 1

If [FLAG] = 0

PC = address(OP2)

If [FLAG]

≠ 0

PC = address(OP1)

IORLW

Inclusive OR literal with W

Syntax:

IORLW

≤ k ≤ FFh

Operation:

[W]

← [W] | k

Flag Affected:

Description:

Inclusive OR the content of the

W register and the eight-bit

literal "k". The result is stored in

the W register.

Cycle:

Example:

IORLW

85H

Before instruction:

W = 69h

After instruction:

W = EDh

IORWF

Inclusive OR W with f

Syntax:

IORWF

f, d

≤ f ≤ FFh

∈ [0,1]

Operation:

[Destination]

← [W] | [f]

Flag Affected:

Description:

Inclusive OR the content of the

W register and [f]. If d is 0, the

result is stored in the W register.

If d is 1, the result is stored back

in [f].

Cycle:

Example:

IORWF

OPERAND,1

Before instruction:

W = 88h, OPERAND = 23h

After instruction:

W = 88h, OPERAND = ABh

Rev. 1.3

20/24

FS91M68 Datasheet(PDF) 20 Page - Fortune Semiconductor Corp.

FS91M68 Datasheet(HTML) 20 Page - Fortune Semiconductor Corp.

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