UPD17708 datasheet(142/358 Pages) RENESAS

142 / 358 page

µPD17704, 17705, 17707, 17708, 17709

140

Figure 12-19. Timing Charts When Interrupt Is Accepted (1/3)

(1) When one interrupt (e.g., rising of INT0 pin) is used

(a) If there is no interrupt mask time by the interrupt flag (IP

×××)

<1> If a normal instruction which is not “MOVT” or an instruction that satisfies a skip

condition is executed when interrupt is accepted

<2> If “MOVT” or an instruction that satisfies a skip condition is executed when interrupt is

accepted

Instruction

MOV

WR, #0010B

POKE

INTPM3, WR

MOVT DBF,

@AR or skip

instruction

Interrupt

cycle

INTE

1.78 s

Interrupt enable period

INT0 pin interrupt accepted

INT0 pin interrupt service

INT0 pin

IRQ0 flag

IP0 flag

1 instruction

cycle

Instruction

MOV

WR, #0010B

POKE

INTPM3, WR

Normal

instruction

Interrupt

cycle

INTE

INT0 pin

IRQ0 flag

IP0 flag

1 instruction

cycle

1.78 s

Interrupt enable period

INT0 pin interrupt accepted

INT0 pin interrupt service

UPD17708 Datasheet(PDF) 142 Page - Renesas Technology Corp

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