3822 datasheet(82/328 Pages) RENESAS

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APPLICATION

2.2 Interrupts

2–16

3822 GROUP USER’S MANUAL

INT0

INT1

Serial I/O receive

Serial I/O transmit

Timer X

Timer Y

Timer 2

Timer 3

CNTR0

CNTR1

Timer 1

INT2

INT3

Key input

(Key-on wake up)

ADT

A-D conversion

BRK instruction

Reference

Interrupt request generating conditions

Interrupt sources

Table 2.2.1 Interrupt sources and interrupt request generating conditions

At detection of either rising or falling edge of INT0 input

(Active edge selectable)

At detection of either rising or falling edge of INT1 input

(Active edge selectable)

At completion of serial I/O data reception

At completion of serial I/O transmit shift or when transmit

buffer is empty

At timer X underflow

At timer Y underflow

At timer 2 underflow

At timer 3 underflow

At detection of either rising or falling edge of CNTR0

input (Active edge selectable)

At detection of either rising or falling edge of CNTR1

input (Active edge selectable)

At timer 1 underflow

At detection of either rising or falling edge of INT2 input

(Active edge selectable)

At detection of either rising or falling edge of INT3 input

(Active edge selectable)

At falling of conjunction of input level for port P2 (at

input mode)

At detection of falling edge of ADT input

At completion of A-D conversion

At BRK instruction execution

(1) Interrupt request generating conditions

Table 2.2.1 shows interrupt sources and interrupt request generating conditions.

The occurrence of an interrupt request causes the corresponding interrupt request bit to be set to “1.”

When the following conditions are satisfied in this state, the interrupt request is accepted.

For details, refer to “2.2.2 Control”.

Interrupt disable flag = “0” (interrupts enabled)

Interrupt enable bit = “1” (interrupts enabled)

2.2.4 INT interrupts

2.5 Serial I/O

2.3 Timer X and timer Y

2.4 Timer 1, timer 2, and timer 3

2.3 Timer X and timer Y

2.4 Timer 1, timer 2, and timer 3

2.2.4 INT interrupts

2.2.5 Key input interrupt

2.6 A-D converter

SERIES 740 <SOFTWARE>

USER’S MANUAL

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