4584 datasheet(91/157 Pages) RENESAS

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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.3.00

2004.08.06

page 91 of 155

REJ03B0010-0300Z

4584 Group

PRELIMINARY

Notice: This is not a final specification.

Some parametric limits are subject to change.

DI (Disable Interrupt)

0000000100

004

–

Grouping:

Interrupt control operation

Description: Clears (0) to interrupt enable flag INTE, and

disables the interrupt.

Note:

Interrupt is disabled by executing the DI in-

struction after executing 1 machine cycle.

Operation:

(INTE)

← 0

DWDT (Disable WatchDog Timer)

1010011100

29C

–

Grouping:

Other operation

Description: Stops the watchdog timer function by the

WRST instruction after executing the

DWDT instruction.

Operation:

Stop of watchdog timer function enabled

EI (Enable Interrupt)

0000000101

005

–

Grouping:

Interrupt control operation

Description: Sets (1) to interrupt enable flag INTE, and

enables the interrupt.

Note:

Interrupt is enabled by executing the EI in-

struction after executing 1 machine cycle.

Operation:

(INTE)

← 1

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

0000010111

017

–

(Y) = 15

Grouping:

RAM addresses

Description: Subtracts 1 from the contents of register Y.

As a result of subtraction, when the con-

tents of register Y is 15, the next instruction

is skipped. When the contents of register Y

is not 15, the next instruction is executed.

Operation:

(Y)

← (Y) – 1

DEY (DEcrement register Y)

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