HD6432351 datasheet(388/1025 Pages) RENESAS

388 / 1025 page

Section 9 I/O Ports

Rev. 3.00 Sep 15, 2006 page 354 of 988

REJ09B0330-0300

9.4.3

Pin Functions

Port 3 pins also function as SCI I/O pins (TxD0, RxD0, SCK0, TxD1, RxD1, and SCK1). Port 3

pin functions are shown in table 9.7.

Table 9.7

Port 3 Pin Functions

Selection Method and Pin Functions

P35/SCK1

The pin function is switched as shown below according to the combination of

bit C/

A in the SCI1 SMR, bits CKE0 and CKE1 in SCR, and bit P35DDR.

CKE1

—

CKE0

—

P35DDR

—

Pin function

P35

input pin

P35

output pin*

SCK1

output pin*

SCK1

output pin*

SCK1

input pin

Note:

* When P35ODR = 1, the pin becomes an NMOS open-drain output.

P34/SCK0

The pin function is switched as shown below according to the combination of

bit C/

A in the SCI0 SMR, bits CKE0 and CKE1 in SCR, and bit P34DDR.

CKE1

—

CKE0

—

P34DDR

—

Pin function

P34

input pin

P34

output pin*

SCK0

output pin*

SCK0

output pin*

SCK0

input pin

Note:

* When P34ODR = 1, the pin becomes an NMOS open-drain output.

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