4518 datasheet(106/160 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.3.01

2005.06.15

page 106 of 157

REJ03B0008-0301

4518 Group

SNZT4 (Skip if Non Zero condition of Timer 4 inerrupt request flag)

SRST (System ReSeT)

SST (Serial i/o transmission/reception STart)

1010000011

283

–

V21 = 0: (T4F) = 1

Grouping:

Timer operation

Description: When V21 = 0 : Skips the next instruction

when timer 4 interrupt request flag T4F is

“1.” After skipping, clears (0) to the T4F

flag. When the T4F flag is “0,” executes the

next instruction.

When V21 = 1 : This instruction is equiva-

lent to the NOP instruction.

Operation:

V21 = 0: (T4F) = 1 ?

After skipping, (T4F)

← 0

V21 = 1: SNZT4 = NOP

(V21 = bit 1 of interrupt control register V2)

0000000001

001

–

Grouping:

Other operation

Description: System reset occurs.

Operation:

System reset occurrence

1010011110

29E

–

Grouping:

Serial I/O operation

Description: Clears (0) to SIOF flag and starts serial I/O.

Operation:

(SIOF)

← 0

Serial I/O transmission/reception start

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

SZB j (Skip if Zero, Bit)

00001000j

02j

–

(Mj(DP)) = 0

j = 0 to 3

Grouping:

Bit operation

Description: Skips the next instruction when the con-

tents of bit j (bit specified by the value j in

the immediate field) of M(DP) is “0.”

Executes the next instruction when the con-

tents of bit j of M(DP) is “1.”

Operation:

(Mj(DP)) = 0 ?

j = 0 to 3

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