4571 Datasheet, PDF(85/126 Page) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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4571 Datasheet, PDF (85/126 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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4571 Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

SNZT2 (Skip if Non Zero condition of Timer 2 interrupt request flag)

Instruc-

Number of

tion

code

1 0 1 0 0 0 0 0 0 1 2 2 8 1 16

words

Number of

cycles

Flag CY

Skip condition

V13 = 0 : (T2F) = 1

Opera-

tion:

V13 = 0 : (T2F) = 1 ?

(T2F) â 0

V13 = 1 : SNZT2 = NOP

(V13 = bit 3 of interrupt control register V1)

Grouping: Timer operation

Description: When V13 = 0 : Clears (0) to the T2F flag and skips the

next instruction when timer 2 interrupt request flag T2F is

â1â. When the T2F flag is â0â, executes the next instruction.

When V13 = 1 : This instruction is equivalent to the NOP

instruction.

SNZT3 (Skip if Non Zero condition of Timer 3 interrupt request flag)

Instruc-

Number of

tion

code

1 0 1 0 0 0 0 0 1 0 2 2 8 2 16

words

Number of

cycles

Flag CY

Skip condition

V20 = 0 : (T3F) = 1

Opera- V20 = 0 : (T3F) = 1 ?

tion: (T3F) â 0

V20 = 1 : SNZT3 = NOP

Grouping: Timer operation

Description: When V20 = 0 : Clears (0) to the T3F flag and skips the

next instruction when timer 3 interrupt request flag T3F is

â1â. When the T3F flag is â0â, executes the next instruction.

When V20 = 1 : This instruction is equivalent to the NOP

instruction.

SNZVD (Skip if Non Zero condition of Voltage Detector interrupt request flag)

Instruc-

Number of Number of

tion

code

1 0 1 0 0 0 1 0 1 0 2 2 8 A 16

words

cycles

Flag CY

Skip condition

V23 = 0 : (VDF) = 1

Opera- V23 = 0 : (VDF) = 1?

tion: V23 = 1 : SNZVD = NOP

Grouping: Other operation

Description: When V23 = 0 : Skips the next instruction when voltage

detector interrupt request flag VDF is â1â. After skipping,

clears (0) to the VDF flag. The VDF flag is not cleared to

â0â.

When V23 = 1 : This instruction is equivalent to the NOP

instruction.

SRST (System ReSet)

Instruc-

tion

code

0 0 0 0 0 0 0 0 0 1 2 0 0 1 16

Number of

words

Number of

cycles

Flag CY

Opera- System reset

tion:

Grouping: Other operation

Description: System reset occurs.

Skip condition

Rev.1.02 May 25, 2007 Page 85 of 124

REJ03B0179-0102

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