7630 datasheet(207/238 Pages) RENESAS

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3-36

7630 Group User’s Manual

APPENDIX

3.5 List of registers

Port P4 pull-up/down control register

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Name

Port P4 pull-up/down control register (PUP4) [Address : 002C16]

0 : No pull-up/down

1 : Pull-up/down (Note)

P40 pull-up/down transistor

control bit

P41 pull-up/down transistor

control bit

P42 pull-up/down transistor

control bit

P43 pull-up/down transistor

control bit

P44 pull-up/down transistor

control bit

P45 pull-up/down transistor

control bit

P46 pull-up/down transistor

control bit

P47 pull-up/down transistor

control bit

0 : No pull-up/down

1 : Pull-up/down (Note)

0 : No pull-up/down

1 : Pull-up/down (Note)

0 : No pull-up/down

1 : Pull-up/down (Note)

0 : No pull-up/down

1 : Pull-up/down (Note)

0 : No pull-up/down

1 : Pull-up/down (Note)

0 : No pull-up/down

1 : Pull-up/down (Note)

0 : No pull-up/down

1 : Pull-up/down (Note)

Note: Enables the pull-transistor towards the passive polarity of key-on wake-up interrupt.

This level depends on the Key-on wake-up polarity control bit (bit 0 of the Polarity

control register [address: 002F16] ).

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).

Fig. 3.5.29 Structure of Port P4 pull-up/down control register

Fig. 3.5.30 Structure of Interrupt polarity selection register

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