3886 datasheet(138/380 Pages) RENESAS

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3886 Group User’s Manual

APPLICATION

2-21

2.2 Interrupt

(2)

Relevant registers setting

Figure 2.2.16 shows the relevant registers setting (corresponding to Figure 2.2.15).

Fig. 2.2.16 Registers setting relevant to key input interrupt (corresponding to Figure 2.2.15)

(3)

Key input interrupt source selection

When using a key input interrupt source, select which of the following by the interrupt source

selection register (address 3916).

•CNTR0 or key-on wake-up (bit 6)

•A-D converter or key-on wake-up (bit 7)

P3D

IREQ2

Key-on wake-up interrupt request (Note 2)

Port P3 direction register (address 0716)

Bits corresponding to P37 to P30

Interrupt request register 2 (address 3D16)

PCTL1

Port control register 1 (address 2E16)

P30 to P33 pull-up

INTSEL

Interrupt source selection register (address 3916)

Key-on wake-up interrupt

N ote

ICON2

Interrupt control register 2 (address 3F16)

N ote

Key-on wake-up interrupt: Enabled (Note 3)

Notes 1: Set “1” to the bit which is selected as the key-on wake-up interrupt source from either b7 or b6

of the interrupt source selection register. Do not set “1” to these bits simultaneously. (When

setting “1” to b6, set “0” to b7. When setting “0” to b6, set “1” to b7.)

2: When setting “1” to b7 of the interrupt source selection register, set “0” to b6 of the interrupt

request register 2. When setting “1” to b6 of the interrupt source selection register, set “0” to

b1 of the interrupt request register 2.

3: When setting “1” to b7 of the interrupt source selection register, set “1” to b6 of the interrupt

control register 2. When setting “1” to b6 of the interrupt source selection register, set “1” to b1

of the interrupt control register 2.

0: Input port

1: Output port

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