4518 datasheet(103/160 Pages) RENESAS

103 / 160 page

Skip condition

Number of

cycles

Number of

words

Instruction

code

Flag CY

Skip condition

Number of

cycles

Number of

words

Instruction

code

Flag CY

Skip condition

Number of

cycles

Number of

words

Instruction

code

Flag CY

Skip condition

Number of

cycles

Number of

words

Instruction

code

Flag CY

Rev.3.01

2005.06.15

page 103 of 157

REJ03B0008-0301

4518 Group

SNZ0 (Skip if Non Zero condition of external 0 interrupt request flag)

0000111000

038

–

V10 = 0: (EXF0) = 1

Grouping:

Interrupt operation

Description: When V10 = 0 : Skips the next instruction

when external 0 interrupt request flag EXF0

is “1.” After skipping, clears (0) to the EXF0

flag. When the EXF0 flag is “0,” executes

the next instruction.

When V10 = 1 : This instruction is equiva-

lent to the NOP instruction.

Operation:

V10 = 0: (EXF0) = 1 ?

After skipping, (EXF0)

← 0

V10 = 1: SNZ0 = NOP

(V10 : bit 0 of the interrupt control register V1)

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

SEA n (Skip Equal, Accumulator with immediate data n)

0000100101

025

–

(A) = n

Grouping:

Comparison operation

Description: Skips the next instruction when the con-

tents of register A is equal to the value n in

the immediate field.

Executes the next instruction when the con-

tents of register A is not equal to the value n

in the immediate field.

Operation:

(A) = n ?

n = 0 to 15

000111nnnn

07n

SEAM (Skip Equal, Accumulator with Memory)

0000100110

026

–

(A) = (M(DP))

Grouping:

Comparison operation

Description: Skips the next instruction when the con-

tents of register A is equal to the contents of

M(DP).

Executes the next instruction when the con-

tents of register A is not equal to the

contents of M(DP).

Operation:

(A) = (M(DP)) ?

SNZ1 (Skip if Non Zero condition of external 1 interrupt request flag)

0000111001

039

–

V11 = 0: (EXF1) = 1

Grouping:

Interrupt operation

Description: When V11 = 0 : Skips the next instruction

when external 1 interrupt request flag EXF1

is “1.” After skipping, clears (0) to the EXF1

flag. When the EXF1 flag is “0,” executes

the next instruction.

When V11 = 1 : This instruction is equiva-

lent to the NOP instruction.

Operation:

V11 = 0: (EXF1) = 1 ?

After skipping, (EXF1)

← 0

V11 = 1: SNZ1 = NOP

(V11 : bit 1 of the interrupt control register V1)

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