7630 datasheet(79/238 Pages) RENESAS

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2-13

7630 Group User’s Manual

APPLICATION

2.2 Interrupts

Fig. 2.2.8 Structure of Interrupt polarity selection register

Fig. 2.2.9 Structure of Polarity control register

Interrupt polarity selection register

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Name

INT0 interrupt edge selection bit

(Note)

Interrupt polarity selection register (IPOL) [Address : 002D16]

0: Falling edge active

1: Rising edge active

0: Falling edge active

1: Rising edge active

Not used (“0” when read, don't write “1”.)

INT1 interrupt edge selection bit

(Note)

Note: To use the external interrupt functions, the pull-up transistor corresponding to the

selected active level must be enabled by the corresponding pull-up transistor control

bits of the Port P1 pull-up control register).

Polarity control register

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Name

Key-on wake-up polarity

control bit

CAN module dominant level

control bit (Note)

Polarity control register (PCON) [Address : 002F16]

0: Low level active (P4 pull-up)

1: High level active (P4 pull-down)

0: Low level dominant (P32 pull-up)

1: High level dominant (P32 pull-down)

Not used (undefined when read.)

Note: The selected dominant level also controls the polarity of the pull-transistor enabled

by the P32 pull-up/down transistor control bit (bit 2 of the Port P3 pull-up control

7630 Datasheet(PDF) 79 Page - Renesas Technology Corp