455A Datasheet, PDF(101/148 Page) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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455A Datasheet, PDF (101/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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455A Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

SNZT1 (Skip if Non Zero condition of Timer 1 interrupt request flag)

Instruc-

Number of

tion

code

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

words

Number of

cycles

Flag CY

Skip condition

V12 = 0 : (T1F) = 1

Opera-

tion:

V12 = 0 : (T1F) = 1 ?

(T1F) â 0

V12 = 1 : SNZT1 = NOP

(V12 = bit 2 of interrupt control register V1)

Grouping: Timer operation

Description: When V12 = 0 : Clears (0) to the T1F flag and skips the

next instruction when timer 1 interrupt request flag T1F is

â1â. When the T1F flag is â0,â executes the next instruction.

When V12 = 1 : This instruction is equivalent to the NOP

instruction.

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 flag)

Instruc-

tion

code

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

Number of

words

Number of

cycles

Flag CY

Skip condition

V23 = 0 : (VDF) = 1

Opera- (VDF) = 1?

tion:

Grouping: Other operation

Description: Skips the next instruction when voltage drop detection cir-

cuit flag VDF is â1â. Execute instruction when VDF is â0â.

After skipping, the contents of VDF remains unchanged.

Rev.1.01 Feb 15, 2008 Page 101 of 146

REJ03B0224-0101

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